how many camshafts does a dohc v8 have
Overhead camshaft


SOHC engine, since the rocker arms are reduced in size or eliminated. A DOHC design permits a wider angle between intake and exhaust valves than in SOHC engines. This can give a less restricted airflow at higher engine speeds. DOHC with a multivalve design also allows for the optimum placement of the spark plug, which in turn improves combustion efficiency. Engines having more than one bank of cylinders (e.g. V6, V8 – where two cylinder banks meet to form a "V") with two camshafts in total remain SOHC and
17385293
Audi V8


one of two all-new, all-aluminium alloy engines – both petrol engines, and both in V8 configuration with 32 valves (four valves per cylinder) with dual valve springs, and four overhead camshafts (DOHC). The design set the pattern for future Audi-developed Volkswagen Group V8 engines. In addition to using an all-aluminum alloy cylinder block (when the established material was grey cast iron), the camshafts were driven using a hybrid method. A rubber/kevlar toothed timing belt, driven from
4366861
Ferrari Jano engine


V8 DOHC engine, intended for Formula One. This family of engines replaced "Lampredi" inline-4s known from Ferrari Monza line and went on to win many international races and titles for Ferrari. The design team comprised Jano as well as Vittorio Bellentani, Alberto Massimino (best known for Maserati 250F), and Andrea Fraschetti. All "Jano" engines used dry sump lubrication and almost all of them had two spark plugs per cylinder with four coils. Also most of them had DOHC configuration with chain-driven camshafts and two valves
18920589
GM 4T80 transmission


in 1993 along with the Northstar Double Overhead Camshaft (DOHC) V8. It reportedly cost 80% more than a similar GM 4T60 transmission and weighed 60 lb (27 kg) more. This transaxle has been used in many of GM's front drive large sedans. The Cadillac Division had exclusive usage of the 4T80-E until the 1995 Oldsmobile Aurora debuted. The Aurora had the 4.0L version of the Northstar V8 coupled to a 4T80-E. It wasn't until 2004 that Pontiac got usage of this transaxle in the Bonneville GXP which employed a
11410437
Audi V8


sold in North America until 1996. The competition model of the Audi V8 won back-to-back Deutsche Tourenwagen Meisterschaft driver's titles in 1990 and 1991, with the championship winners being Hans-Joachim Stuck and Frank Biela respectively. Audi was the first company to win back-to-back DTM titles. Standard features for the Audi V8 included a 32-valve, double overhead camshaft (DOHC) V8 engine and a four-speed electronically controlled ZF 4HP24A automatic transmission providing Audi's quattro permanent four-wheel drive system.
4366856
Overhead camshaft


to the 1950s. The terms "multivalve" and "DOHC" do not refer to the same thing: not all multivalve engines are DOHC and not all DOHC engines are multivalve. Examples of DOHC engines with two valves per cylinder include the Alfa Romeo Twin Cam engine, the Jaguar XK6 engine and the Lotus Ford Twin Cam engine. Most recent DOHC engines are multivalve, with between three and five valves per cylinder. More than two overhead camshafts are not known to have been tried in a production engine. However, MotoCzysz
17385295
Moto Guzzi


. The elastic frame rear suspension was immediately introduced to production machines, transforming the usability of the motorcycle as an everyday form of transportation. In 2006, Moto Guzzi retraced the 'raid' of 1928 to introduce the Norge 1200. The word "Norge" is Norwegian for "Norway". The Moto Guzzi Grand Prix V8, introduced in 1955, was a 500 cc racing motorcycle fitted with a V8 engine using dual overhead camshafts (DOHC). The engine was conceived by Giulio Carcano, Enrico Cantoni, Umberto Todero,
11060556
List of Ferrari engines


company's well-known 65° V6 DOHC engines. This Vittorio Jano design formed the basis of the company's modern engines right up through the mid-2000s (decade). Another series of V6 engines was started in 1958 with a 60° V-angle and single overhead camshafts design. The first V8 engine was derived from a Lancia project, used in D50 F1 racecar. The "Dino" V8 family lasted from the early 1970s through 2004 when it was replaced by a new Ferrari/Maserati design. Ferrari used V10
20230535
Ford SHO V8 engine


SHO V6, including the aluminum cylinder heads and 4 valves per cylinder DOHC design, but differed with an aluminum rather than iron block and no variable length intake manifold. A chain is also used to time the camshafts to crankshaft instead of the belts that the SHO V6s used. The SHO V8 has a split port style intake valve setup. The primary valve is exposed all the time and has the fuel injector spraying on it, while the secondary valve is only exposed when the Intake manifold Runner Control opens the secondary plates at
8193238
Multi-valve


valves per cylinder (three intakes, three exhaust). It achieved at 7,200 rpm (97.5 kW/liter). Although most multi-valve engines have overhead camshafts, either SOHC or DOHC, a multivalve engine may be a pushrod overhead valve engine (OHV) design. Chevrolet has revealed a three-valve version of its Generation IV V8 which uses pushrods to actuate forked rockers, and Cummins makes a four-valve OHV straight six diesel, the Cummins B Series (now known as ISB). Ford also uses
10046501
Ford Modular engine


SVT vehicles, such as the Ford GT and Shelby GT500, have been hand-built by technicians at Ford's Romeo, Michigan plant. "Vehicles equipped with the 32-valve DOHC 5.4 L include the following:" The 5.8 is formally known as the Trinity Engine or 5.8-liter V8 engine, which benefits from cylinder heads with improved coolant flow, Ford GT camshafts, piston-cooling oil jets similar to those found on the 5.0 Coyote, new 5-layer MLS head gaskets, an over-rev function that increases the red line to
15307522
BMW OHV V8 engine


The BMW OHV V8 is an overhead valve V8 petrol engine produced from 1954 to 1965. It is BMW's first V8 engine, and BMW did not produce another V8 automobile engine until the BMW M60 in 1992. The engine does not have an official model code, therefore it is often identified as being the only overhead valve ("OHV") V8 engine produced by BMW, since all other BMW V8 engines use a dual overhead camshaft valvetrain. Although not a direct replacement, in 1965 the six-cylinder BMW M30
8141085
List of Nissan engines


single overhead camshaft so there is no "D" listed in the name; the camshaft type designation place being left out completely. Nissan does not have a letter designation for the SOHC configuration so the camshaft configuration type is assumed as SOHC if no letter is present.br br Lastly, the MR16DDT engine has feature designations that describe an engine with dual overhead camshafts, direct cylinder fuel injection and a single turbocharger. Nissan's Straight-4 engines include: Nissan's Straight-6 engines include: Nissan's V6 engines include: Nissan's V8 engines include
13039128
List of AMC engines


feature a 10" deck height, which by Ford standards, is the dividing line between 'small blocks' and 'big blocks', so the typical 'other make' automotive jargon does not add any useful description. All '66-'91 AMC V8s have the same 4.75" bore spacing as the Rambler V8 and the same crankshaft to camshaft centerline distance but this second AMC V8 design weighs less for a variety of technical reasons. The '66-'91 AMC V8's generic engine weight is 540 lbs. The AMC V8 continued to
9014553
Mazda FE-DOHC engine


interference design. There are two valve springs per valve and four valves per cylinder. While a dual valve spring configuration is used, the stock springs are fairly low-sprung. Low spring rates were chosen for increased valvetrain longevity and low friction with the dual valve springs for the reduction of harmonics and increased valve stability. The Mazda FE-DOHC came with several different camshaft profiles from the factory. As such there were several camshaft combinations available. The F8K1 was the intake camshaft for the F8-DOHC, only listed due to family
12368728
Variable Cam Timing


of oil to the phaser cavity. The phaser cavity changes the valve timing by rotating the camshaft slightly from its initial orientation, which results in the camshaft timing being advanced or retarded. The PCM adjusts the camshaft timing depending on factors such as engine load and RPM. For twin cam or DOHC engines, VCT was used on either the intake or exhaust camshaft. (Engines that have VCT on both camshafts are now designated as Ti-VCT.) The use of variable camshaft timing on the exhaust camshaft is for improved emissions
12030799
Nissan VK engine


alloy block and heads and low-friction molybdenum-coated pistons. The valvetrain is a dual overhead cam (DOHC) design with a continuously variable valve timing control system (CVTCS) on the intake valves. It also has 4 valves per cylinder with micro-finished camshafts and ductile iron cylinder liners for increased durability. Nismo also uses the VK56DE for FIA GT1 racing. In race trim, it produces and of torque. The Nissan Motorsport VK56DE was launched in Australia for the V8 Supercars Championship in 2013 by Kelly Racing in
13040166
BMW M62


The BMW M62 is a naturally aspirated V8 petrol engine which was produced from 1995 to 2005. A successor to the BMW M60, the M62 features an aluminium engine block and a single row timing chain. In 1998, a Technical Update included VANOS (variable valve timing) for the intake camshafts. The S62 engine is the BMW M high performance version of the M62, which was released in the E39 M5. Like the BMW M60 engine it replaced, the M62 is a DOHC engine with four valves per cylinder, an
18029658
Engine configuration


of its two-cylinder heads is still an SOHC design, and a V engine with two camshafts per cylinder head is DOHC, or informally a "quad cam" engine. With overhead camshafts, the valvetrain will be shorter and lighter, as no pushrods are required. Some overhead camshaft designs still have rocker arms; this facilitates adjustment of mechanical clearances. A four valves per cylinder design usually has two valves for intake and two for exhaust, which requires two camshafts per cylinder bank. If there are two camshafts in the
20467771
Saab H engine


use two valves per cylinder and DOHC versions use four valves per cylinder with a pentroof chamber, the valve angle being 22 degrees from vertical. All engines use flat inverted bucket type valve lifters, hydraulic in the case of DOHC engines. The engines were given numbers, for instance B201 is a 2.0-litre (20) engine with one camshaft. B201 is the original H engine with two valves per cylinder and a single overhead camshaft. It was introduced in 1981 and unlike the B engine it did not have the central shaft which
17620147
Pegaso Z-102


used a 2.8 L (2,816 cc), and 3.2 L (3,178 cc) litre DOHC desmodromic 32-valve V8 engines with multiple carburetors or an optional supercharger. Power ranged from to and was sent to the rear wheels through a five-speed gearbox with gear-driven camshafts. The base model Z-102 had a top speed of 120 mph (192 km/h). In supercharged trim the Z-102 could reach a top speed of , making it the world's fastest production car at that time. The main beams of the
14478155
Overhead camshaft


"twin cam" unless each cylinder bank has two camshafts; the latter are DOHC, and are often known as "quad cam". Although the term "twin cam" is often used to refer to DOHC engines, it is imprecise, as it includes designs with two block-mounted camshafts. Examples include the Harley-Davidson Twin Cam engine, Riley car engines from 1926 to the mid 1950s, Triumph motorcycle parallel-twins from the 1930s to the 1980s, and Indian Chief and Scout V-twins from 1920
17385294
Alfa Romeo 33 Stradale


-sump lubricated all aluminum V8 engine that featured SPICA fuel injection, four ignition coils and twin spark plugs per cylinder. The engine used four chain-driven camshafts to operate the DOHC 2 valves per cylinder valvetrain and had a rev-limit of 10,000 rpm with a compression ratio of 10.5:1, producing at 8,800 rpm and at 7,000 rpm of torque in road trim and in race trim. Because every Stradale is hand built and unique the power levels can vary by car, used rpms etc., for example the first production
11897397
Infiniti QX70


friction molybdenum-coated pistons that makes use of the continuous variable valve timing which in part optimizes the opening of intake valves. This is also coupled with an electronically controlled super-wide ratio five-speed automatic with a manumatic shift mode that includes the option of sequentially selected manual gearshifts and downshift rev matching. The AWD FX45 incorporates a 4.5-liter (4,494 cc) 32-valve V8 DOHC VK45DE gasoline engine with four valves per cylinder, microfinished camshafts with aluminum-alloy block and heads, low-friction molybdenum-coated pistons, titanium
21556217
Engine configuration


heat problems and fell out of favor for automobile use, see "flathead engine". The majority of modern automobile engines place the camshaft on the cylinder head in an overhead camshaft (OHC) design. There may be one or two camshafts in the cylinder head; a single camshaft design is called single overhead camshaft (SOHC). A design with two camshafts per cylinder head is called double overhead camshaft (DOHC). Note that the camshafts are counted per cylinder head, so a V engine with one camshaft in each
20467770
Toyota A engine


from the 4A-GE in terms of performance and power. Although both have the same displacement and are DOHC, they were optimized for different uses. The first obvious difference are the valves, the engine's intake and exhaust valves were placed 22.3° apart (compared to 50° in the G-Engines). The second is that it employed a "slave cam system", the camshafts being geared together and driven off one camshaft's sprocket (both camshafts' sprockets on the G-Engine are rotated by the
21260761
Ford flathead V8 engine


amateur mechanics. These shell main bearings are made of a cadmium silver alloy. The Ford flathead V8 has a single camshaft located inside the engine block above the crankshaft. It is spur gear driven; the camshaft's spur gear is made of plastic. The camshaft has three camshaft bearings. A lid made of cast iron covers the camshaft spur gears; the ignition distributor is placed on top of this lid and is driven by the camshaft spur gears. For powering the fuel pump, the camshaft is fitted with an extra cam
12442680
Camshaft


gasoline engines the overhead cam system, where the camshaft is on top of the cylinder head, is quite common. While today some engines rely on a single camshaft per cylinder bank, which is known as a "single overhead camshaft" (SOHC), most modern engines are driven by a two camshafts per cylinder bank arrangement (one camshaft for the intake valves and another for the exhaust valves); such camshaft arrangement is known as a "double" or "dual overhead cam" (DOHC), thus, a
16471612
Buick V8 engine


then-new Oldsmobile "Rocket V8". It became known as the "nailhead" for the unusual vertical alignment of its small-sized valves. To offset the smaller-sized valves and restrictive intake- and exhaust-port diameters, the nailhead V8 family used a camshaft with greater lift and duration. The small-diameter intake runners allowed these engines to develop high torque, with many exceeding one foot-pound per cubic inch, exceptional for the time. All of the nailhead designs have a bore spacing. The produced
3870588
Overhead camshaft


overhead camshaft, a bevel shaft with a sliding spline was the easiest way to allow for this expansion. These bevel shafts were usually in an external tube outside the block, and were known as "tower shafts". By the end of the war the DOHC Napier Lion had entered service with the Allies. Among the early pioneers of DOHC were Isotta Fraschini's Giustino Cattaneo, Austro-Daimler's Ferdinand Porsche, Stephen Tomczak (in the "Prinz Heinrich") (in 1919); Sunbeam built small numbers of racing
17385309
Ford Modular engine


S.p.A. Since 1996, all of the 4.6 L 4-valve engines manufactured for use in the SVT Cobra have been hand-built by SVT technicians at Ford's Romeo, Michigan plant. The 4-valve DOHC 4.6 L engine was on the Ward's 10 Best Engines list for 1996 and 1997. "Vehicles equipped with the 32-valve DOHC 4.6 L include the following:" The "Coyote" V8 is the latest evolution of the Modular engine. Ford engineers needed to design a V8, specifically for the Mustang GT, that would
15307498
Mazda F engine


-DOHC engines available with various compression ratio, camshaft and ECU tuning combinations however none were fitted with a turbocharger from the factory. Like many DOHC engines, this engine has an interference valvetrain design, making periodic timing belt changes vital to the engine's life. Should the timing belt break the engine should be replaced as piston and valvetrain damage will occur. Applications: The F2 is a stroked version of the FE with a bore and stroke of , for a displacement of . Introduced for the 1988–1992 GD platform cars, it
7867027
VR6 engine


valves (four per cylinder) had two overhead camshafts as well, however with a slight change of operation principle: In the 24 valve engine all intake valves are operated by the front camshaft (with the aid of rockers), while all the exhaust valves are operated by the rear camshaft (again with rockers). This operating principle is more akin to a double overhead camshaft (DOHC) design, with one camshaft for intake valves, and one for exhaust valves. There are several different variants of the VR6 engine.
16643841
Motorcycle engine


the combustion chamber resides within the cylinder and/or a depression in the piston crown, but usually a "dome" within the cylinder head provides most of the combustion volume. Motorcycles, use poppet valves in a range of designs: side valve, overhead valve (OHV) with pushrod operation, overhead cam (SOHC), and double overhead cam (DOHC). A cylinder with desmodromic valves may have three or even four camshafts. An OHC or DOHC cylinder head will have at least two valves per cylinder (1 inlet and
4976388
MV Agusta 250 Bicilindrica


four-stroke engine with double overhead camshafts (DOHC). The camshafts were driven by a gear train. The valves had diameters of 34 mm (inlet) and 32 mm (outlet) and had an angle of 90 ° between them. The cylinders were tilted 5 ° forward. The engine had a bore and stroke of 53 mm × 56 mm. Engine power was 36 bhp at 12,500 rpm, an improvement over the 250 single's 29 bhp. That was a very high end speed for that time and many
17660687
Overhead camshaft


the Boston Whaler boats. When DOHC technology was introduced in mainstream vehicles, it was common for it to be heavily advertised. While used at first in limited production and sports cars such as the 1925 Sunbeam 3 litre, Alfa Romeo is one of the twin cam's greatest proponents. 6C Sport, the first Alfa Romeo road car using a DOHC engine, was introduced in 1928. Ever since this, DOHC has been a trademark of most Alfa Romeo engines (some Alfa V6 engines are SOHC, not DOHC. Most Alfasud
17385315
Lincoln Aviator


AWD models. In place of the SOHC 2-valve version of the 4.6 L "Modular" V8 shared with the Explorer/Mountaineer and other Ford trucks, the Aviator was fitted with the DOHC 4-valve version of the engine, shared with the Mustang Mach 1 and Marauder. Producing and of torque, the DOHC V8 engine in the Aviator came with two more horsepower than the 5.4 L V8 in the Navigator (though with less of torque). As with the Explorer/Mountaineer, rear-wheel-drive was standard, with
6661907
Ford SHO V8 engine


with the valves if the camshaft or timing chain fails. Due to some cam sprocket failures, the engine acquired a reputation for potentially catastrophic failure. Soon after the introduction of the SHO V8 engine, widespread problems with the cam sprockets began to surface. Yamaha had used a relatively unusual method, called "swaging", of affixing the cam sprockets to the camshafts. The cam sprockets were fastened to the hollow camshafts by forcing a metal ball which was slightly larger than the interior diameter of the camshaft through the center of the
8193241
V8 engine


configuration. The 8V31 weighs 56 metric tons and is rated at . Moto Guzzi of Italy built a water-cooled DOHC V8 4-stroke motorcycle for Grand Prix racing between 1955 and 1957, referred to as the Moto Guzzi Grand Prix 500 cc V8. It was known as the "Otto Cilindri," and had a very high power output but was not developed to its full potential. Each cylinder had its own carburetter. Around 1964, Finnish TT motorcyclist technician area lecturer Tauno Nurmi built a 350 cc DOHC V8-powered 4-stroke motorcycle engine
6288995
Overhead camshaft


51 (1931). and three years later, Harry A. Miller and Fred Offenhauser inaugurated the line of 4.1 litre DOHC Offenhauser inline-4 American auto racing engines, which began to dominate American open-wheel auto racing through much of the 20th century. American luxury automaker Duesenberg was an early proponent of overhead camshaft engines with their SOHC straight eight Model A, produced from 1921-1927. Duesenberg also produced successful OHC race car engines in the 1920s. The 1928-1937 Duesenberg Model J featured a DOHC straight eight engine producing 265
17385311
Motorcycle engine


head enables higher rpm to be achieved without detrimental valve float also known as valve bounce. In a side-valve engine, the valves are operated from the "underhead" cam without special valve gear. Overhead valve (OHV) engines have valves operated by pushrods. Single- and double-overhead camshaft (SOHC and DOHC, respectively) engines have overhead camshafts typically operated by chain, belt, gear train or bevel gear drive. The earliest motorcycle engines had exhaust valves operated in the same way as a side-valve engine
4976390
Lincoln LS


-aluminum 3.0 L DOHC V6 that was a variant of the Jaguar AJ-V6 engine. Optional in the LS was an all-aluminum 3.9 L DOHC V8, a shorter-stroke variant of the Jaguar 4.0 L AJ-26 V8. The V8 was not offered as a manual because the Getrag could not handle the torque produced. Both engines required premium-grade gasoline for optimum performance. Ford's 5R55S five-speed automatic transmission with an optional manual shift ability called "SelectShift" was standard with either engine, while a
6662422
Crossplane


disposed in opposite banks, so long equal-length exhaust pipes are needed to merge these pairs and achieve uniform scavenging. One of the earliest examples of such a tuned exhaust for a crossplane V8 was as fitted to the 1.5 Liter Coventry Climax FWMV Mk.I and Mk.II engines in the early 1960s - these were known to get in the way of servicing the engine itself, however. Many racing crossplane V8 engines (like Ford 4.2L DOHC V8 for Indy racing) had exhaust ports on the inside of the V
20455165
BMC A-series engine


It became the basis for many of their following engines notably the later OHC Nissan E engine, was scaled up into Nissan CA engine and ultimately the DOHC CA18DET. All these engines show their lineage by the characteristic un-skirted crankcase block of the BMC A series, but with the A and E having the camshaft moved to the right side allowing greater port areas, and a mounting on the right wall of the crankcase for the oil pump whereas the BMC A series had the oil pump at the back end of the left
19247377
Straight-six engine


is mechanically simpler than a V6 or V8 since it has only one cylinder head and the overhead camshaft configuration has half as many camshafts. Diesel straight-sixes are available in passenger cars. A 2.4l VW diesel was available in the Volvo 240 from 1978. Mercedes-Benz debuted the OM603 diesel in 1985. The twin-turbo BMW M57 and N57 engines produce up to and from their capacities respectively. Japanese passenger car diesels include the Nissan RD engine, Nissan LD engine, and the Nissan TD engine, which have similar
20632305
Jaguar AJ-V8 engine


The Jaguar AJ-8 is a compact DOHC V8 piston engine used in many Jaguar vehicles. It was the fourth new engine type in the history of the company. In 1997 it replaced both designs previously available on Jaguar cars: the straight-6 Jaguar AJ6 engine (or rather its AJ16 variant), and the Jaguar V12 engine. It remained the only engine type available on Jaguar until 1999 with the launch of the S-Type, when the Jaguar AJ-V6 engine was added to the list. The AJ-V8 is available
17794417
Honda advanced technology


thickness of the cylinder block and camshaft, engine weight is reduced by 15% and fuel efficiency is improved by 10%. Employs VTC, direct injection technology and the Atkinson cycle using the DOHC, VTEC technologies as the base. Extensive friction reduction measures have been implemented. Employs direct injection technology and the Atkinson cycle using the DOHC, VTEC technologies as the base. Implementation of VTC and high-capacity EGR (exhaust gas recirculation) to both the intake and exhaust ports creates significantly reduced friction. For the 2.0L class hybrid
22116969
Ford Modular engine


the Ford Fairlane sedan model ranges, as well as in its high performance Ford Performance Vehicles (FPV) division models, until mid-2010, when they were replaced by the 5.0L. The DOHC 5.4 L V8s are named "Boss" by Ford Australia. "Ford of Australia 4-valve DOHC 5.4 L V8 engines include:" In 2005, Ford Racing Performance Parts introduced a V8 crate engine for use in motor racing and home-made performance cars, officially called M-6007-T50EA, but more widely known as "Cammer". Since then,
15307525
Ferrari Jano engine


a highly competitive race car at its time. "Type 136" was introduced in 1957 in Ferrari 290 S. Having same measurements as before (73 mm by 69.5 mm) and same capacity, this engine received a DOHC configuration. It was first Ferrari sports racing car with DOHC V12 engine, nine years before "Colombo" V12 received a quad-cam upgrade in 275 P2. Those twin camshafts per cylinder bank were inspired by Lancia D50 Formula One car's engine, also designed by Vittorio Jano. With new configuration also
18920591
Honda


, has never built a V8 for passenger vehicles. In the late 1990s, the company resisted considerable pressure from its American dealers for a V8 engine (which would have seen use in top-of-the-line Honda SUVs and Acuras), with American Honda reportedly sending one dealer a shipment of V8 beverages to silence them. Honda considered starting V8 production in the mid-2000s for larger Acura sedans, a new version of the high end NSX sports car (which previously used DOHC V6 engines with VTEC to achieve its high
13700735
Chevrolet El Camino


body designs was much better visibility of which the unusually thin windshield pillars contributed. A structural improvement was a stronger design for the side door guard beams. El Caminos shared the "Colonnade" frameless door glass with other Chevelles, and would continue this feature into the next generation as well. The 307 2-barrel V8 with was the base engine. Options included a 350 2-barrel V8 with , a 350 4-barrel V8 with , and a 454 4-barrel V8 with . Hardened engine valve seats and hydraulic camshafts made these engines reliable for many miles
14092810
Chevrolet Chevelle Laguna


the instrument gauge cluster. While lesser Chevelles (except the Malibu SS option) came standard with either a 250-cubic-inch six-cylinder or a 307-cubic-inch two-barrel V8, Lagunas came standard with a 145-horsepower 350-cubic-inch two-barrel V8. Options included a 350 four-barrel V8 of and a 454 four-barrel V8 rated at . Hardened engine valve seats and hydraulic camshafts made these engines reliable for many miles, and allowed them to accept the increasingly popular unleaded regular gasoline. A three-speed
17781355
Chevrolet Chevelle


room. Five power teams were available for 1973 Chevelle models; the 250 inline-six and 307 2-barrel V8 both rated at were std. engines on Deluxe and Malibu. The 350 2-barrel V8 of was the base Laguna engine. Options for any Chevelle included a 350 4-barrel V8 of and a 454 4-barrel V8 rated at . Hardened engine valve seats and hydraulic camshafts made these engines reliable for many miles, and allowed them to accept the increasingly popular unleaded regular gasoline. 3 speed manual transmission was standard; 4 speed manual and
650007
Mazda FE-DOHC engine


at least five different FE-DOHC engines available with various compression ratio, camshaft and ECU tuning combinations, however none were fitted with a turbocharger from the factory. Despite this, the FE-DOHC is already built for turbo with large forged connecting rods, large journal dimensions, oil cooler, piston oilers, web-stiffened block with main girdles (and braceplate where equipped). This robust engine design is a favourite of tuners who are aware of its capability because it already has a high-power capacity perfect for custom
12368723
BMW M60


The BMW M60 is a naturally aspirated V8 petrol engine which was produced from 1992 to 1996. It was BMW's first V8 engine in over 25 years. The M60 was replaced by the BMW M62 engine. During the 1970s, BMW produced a prototype V8 engine for the E23 7 Series, however this engine did not reach production. Development of the M60 began in 1984. The M60 engine has double overhead camshafts with four valves per cylinder. The camshaft is driven by a dual-row timing chain with a self-
10814845
Ford Performance Vehicles


the release of the FG in 2008. For the FG MkI, the 5.4 was further tuned to produce 315 kW (428 PS; 422 bhp) and 551 N·m (406 lb·ft). FPV achieved this through a new camshaft profile, new camshaft timing, strengthened piston assembly and a higher compression ratio (10.5:1 to 10.8:1). In October 2010 FPV retired the 5.4L Boss V8, in favour of a new supercharged 5.0L V8. The project, codenamed "Miami", is based on the Coyote 5.0 litre V8 and
9850554
Mitsubishi 4A9 engine


of the exhaust manifold at the rear of the engine. This layout is beneficial since it minimizes the heat capacity of the exhaust system upstream of the catalytic converter and thus, together with combustion control, promotes activation of the catalytic converter. 4A91's DOHC camshafts are driven by a single-stage roller chain of pitch and width, instead of the previous 4G15's cogged belt drive. Camshafts act directly on bucket-type tappets. The intake camshaft is fitted with a continuously variable cam-phasing, altering timing up to 50
11903390
MV Agusta 125 Bialbero


-stroke engine. The name "Bialbero" means "two camshafts". It was clear at that time that the lightweight models would need two camshafts. The MV Agusta Bialbero 125 engine even resembled the Benelli 250 cc racer from before the Second World War . The engine was an air-cooled single-cylinder four-stroke with double overhead camshafts (DOHC) powered by a gear train. The valves were at an angle of 90° to each other and were closed by external hairpin springs. The valve diameter of
18114082
BMW OHV V8 engine


increased the block stiffness over typical engines with wet cylinder liners. The layout of the engine is a 90° V8 with cast iron wet liners and stiffening webs between the cylinders. Apart from the materials, the engine was similar in overall design to the Cadillac OHV V8 and Oldsmobile V8 engine of the late 1940s, with a central camshaft using pushrods to operating overhead valves in crossflow cylinder heads with wedge-shaped combustion chambers. The versions have a bore of and a stroke of . Initially, this engine used a two barrel
8141088
Ford Modular engine


rpm and at 4500 rpm. The Shelby GT500 uses a 4-valve DOHC 5.4 L with an Eaton M122H Roots type supercharger and air-to-liquid intercooler. The GT500 5.4 L shares its high-flow cylinder head castings with the Ford GT, with only minor machining differences, and shares camshafts with the 2003–2004 Ford Mustang SVT Cobra; which have less lift and duration than the Ford GT camshafts. The 2007–2010 GT500 engine used an iron engine block, while the 2011 GT500 5.4 L receives a new aluminum engine block, with
15307520
Ford Motor Company


Championship three times in 1966, 1967, and 1968, and the World Rally Championship three times in 1979, 2006 and 2007. IndyCars with Ford engines first competed in 1935 using a production-based Ford V8 in the Miller-Ford racer. A pushrod Ford V8 raced with Lotus in 1963, and Ford's first Indy win was in 1965 with a DOHC V8. Ford motors, including the Ford-sponsored DFX engine developed by Cosworth, have won the Indianapolis 500 eighteen times. On May 12, 1996, Arie
1375890
GM Y platform


bodies built after 1964 can be identified by the inclusion of the Y as the fourth character in the Vehicle Identification Number, or VIN. Only two Y-body cars have been produced in this second group: The Y-Body has a rear-wheel drive, front-engined V8 layout, accommodating either a small block Chevrolet V8 (such as an LT4 or LS1) in the Corvette, or the 32-valve DOHC Northstar V8 in the XLR. The Y-Body also has 4-wheel independent suspension. Like a standard rear
13989263
Overhead camshaft


and indirectly, through a short rocker arm, on the exhaust valve(s). This allows a compact, light valvetrain to operate valves in a flat combustion chamber. The Unicam valve train was first used in single cylinder dirt bikes and has been used on the Honda VFR1200 since 2010. A dual overhead camshaft (DOHC) valvetrain layout is characterised by two camshafts located within the cylinder head, one operating the intake valves and the other one operating the exhaust valves. This design reduces valvetrain inertia more than is the case with an
17385292
Honda advanced technology


and Lift Electronic Control), an evolution of Honda's VTEC engine. The i-VTEC engine works by controlling the timing and lifting of the camshafts depending on engine speeds. The valves open a small amount during low engine speeds to achieve maximum fuel efficiency. The valves will open wider at higher engine speeds to achieve higher performance. Honda i-VTEC (intelligent-VTEC) has VTC continuously variable timing of camshaft phasing on the intake camshaft of DOHC VTEC engines. The technology first appeared on Honda's K-series
22116965
Ford SHO V8 engine


camshaft, thus expanding the metal slightly and creating a mechanical bond between the cam sprocket and the camshaft. This method proved to be inadequate, and the cam sprocket could break loose from the camshaft and spin independently from the camshaft (or "walk"). This would result in the camshaft stopping and thus not activating the valves, allowing the pistons to hit the valves, ruining the engine. The preventive measure of welding the cam sprocket to the camshaft soon proved to be a fix for engines that had not suffered such
8193242
Cadillac twin-turbo V8


The Cadillac Blackwing V8 (GM RPO "LTA") is a twin-turbo DOHC V8 engine produced by General Motors for use in Cadillac vehicles only. It is a clean sheet engine design, as well as Cadillac's first ever twin-turbo V8 engine. The engine was branded as the "Blackwing V8" by GM technicians, and is the first Cadillac-exclusive dual overhead cam V8 engine since the Northstar V8 was dropped in 2011. The aluminum cylinder block houses a lightweight rotating assembly composed of a forged steel
5654846
Formula 5000


at many international circuits, including Monza (Italy), Hockenheim (Germany) and Zandvoort (Netherlands), and attracted a significant number of continental drivers. The weak pound (a result of the energy crisis) and the increasing cost of importing Chevrolet V8 engines caused some concern and engine regulations for European F5000 were revised to permit engines other than the 5.0 litre pushrod V8s - the DOHC Cosworth GA V6 (based on a unit used in Group 2 Capris was permitted to race at a capacity of 3500cc. March 75A and
20007758
Overhead camshaft


intermediary rocker arm. SOHC cylinder heads are generally less expensive to manufacture than double overhead camshaft (DOHC) cylinder heads. Timing belt replacement can be easier since there are fewer camshaft drive sprockets that need to be aligned during the replacement procedure. SOHC designs offer reduced complexity compared with overhead valve designs when used for multivalve cylinder heads, in which each cylinder has more than two valves. An example of an SOHC design using shim and bucket valve adjustment was the engine installed in the Hillman Imp (four cylinder, eight valve)
17385289
Ford Mustang Mach 1


and struts, and lower and stiffer springs, the Mach 1 received a huge performance gain over the base GT and even the Bullitt in the form of a unique variant of the DOHC 32-valve 4.6 Liter Modular V8. Commonly known by Mach 1 owners as an "R" code DOHC, (for the unique VIN engine R code) this all-aluminium engine features the same high flow heads as the 2003–2004 SVT Cobra, 2003–2004 Mercury Marauder, 2003–2005 Lincoln Aviator, and the 2003–2009 Australian Boss 5.4 L V8s (see Ford
5619234
Multi-valve


NA 3.0-liter V8 producing appr. at 9,000 rpm (101.9 kW/liter), featured four valves per cylinder. For many years it was the dominant engine in Formula One, and it was also used in other categories, including CART, Formula 3000 and Sportscar racing. Debuting at the 1968 Japanese Grand Prix in the original 3.0-liter version the Toyota 7 engine participated in endurance races as a 5.0-liter (4,968 cc) non-turbo V8 with DOHC and 32-valves. It produced at 8,000 rpm (88.8 kW/liter) and
10046484
Saab V8


the only other Saab to have a factory-installed V8 was a Saab 9-5 with a prototype GM XV8 engine mounted for evaluation. The Saab V8 had a 90° included angle between cylinder banks, four camshafts, and 4 valves per cylinder for a total of 32 valves. Both cylinder heads were from the Saab B202 engine, but to arrange for intake ports on both sides of the vee to be inside the valley and exhausts to be outside, flow through one head was reversed; the intake ports became exhausts
12149142
Camshaft


requires further expense of a cam damper. Rolls-Royce V8 (1954) used gear drive as, unlike chain, it could be made silent and to last the life of the engine. Where gears are used in cheaper cars, they tend to be made from resilient fibre rather than metal, except in racing engines that have a high maintenance routine. Fibre gears have a short life span and must be replaced regularly, much like a timing belt. In some designs the camshaft also drives the distributor and the oil and
16471601
Poppet valve


cam or "SOHC" engine. Often there are two camshafts, one for the intake and one for exhaust valves, creating the dual overhead cam, or "DOHC". The camshaft is driven by the crankshaft — through gears, a chain or a timing belt. In the early days of engine building, the poppet valve was a major problem. Metallurgy was lacking, and the rapid opening and closing of valves against cylinder heads led to rapid wear. They would need to be re-ground in a process known
16471575
GM Ultra Engine


Ultra was the codename for General Motors' next-generation family of DOHC V8 engines that was being developed to replace the Northstar as the V8 engine of choice for GM's premium vehicles. There is very little information on the engine's specifications currently available, however its lowest displacement would presumably have been similar to the Northstar's, (with higher-displacement versions probable as well), and it would very likely have incorporated technologies from the High Feature V6 family, including continuously variable valve timing on both intake and exhaust ports
3440798
Ferrari Jano engine


Championship solely with 250 Testa Rossas. Vittorio Jano being a talented engineer, designed many different types of engines in his career. When Enzo Ferrari brought him from Lancia in 1955 he also inherited their , DOHC, 90° V8 Formula One engine from Lancia D50 race car. In 1956 this car was reinstituted as Ferrari D50 and was powered by a engine with 76 x 68.5 mm of bore and stroke and capable of at 8000 rpm. V8 engine was redesigned yet again for 1957 Formula One season and used in Ferrari 801 F1
18920600
Benelli (motorcycles)


using a version specially designed for competitions, Tonino "the terrible" took to the track. He displayed an extraordinary natural talent as a rider and embarked on a very successful career which confirmed the company's exceptional capacity for development and production. Riding a Benelli 175, Tonino Benelli won four Italian championship titles in five years: in 1927, 1928 and 1930 with the single overhead camshaft (SOHC) version, and in 1931 with the double overhead camshaft (DOHC) version. Unfortunately, a bad crash during a race in
13560513
MV Agusta 250 Monocilindrica Bialbero


250cc racer, but that was not possible by further boring of the cylinder, so the stroke was increased from 56 mm to 60 mm. The engine was an air-cooled, single-cylinder, four-stroke engine with double overhead camshafts (DOHC). The camshafts were driven by a gear train. The valves were at an angle of 90° to each other and were closed by hairpin valve springs. The bore and stroke were 72.6 mm × 60 mm, giving a engine displacement of 248.2 cc. A
17532597
Toyota GR engine


i, uses cooled EGR system. For the Lexus RX 450h, the compression ratio was 12.5:1. For the Lexus GS 450h, the compression ratio was 13.0:1. Applications (calendar years): The 2GR-FKS is a , 24-valve DOHC V6 engine that combines the D-4S system from the 2GR-FSE with the simulated on-demand Atkinson cycle used in the 2UR-GSE and 8AR-FTS engines. The intake camshafts are equipped with VVT-iW and the exhaust camshafts are equipped with VVT-i. In the
20626046
Cosworth


assembly business, and allowed its resources to be concentrated on racing engine development. The first Cosworth-designed cylinder head was for SCA series; with a single overhead camshaft (SOHC) reverse-flow configuration, similar to the Coventry Climax FWE engine. A real success was achieved with the next gear-driven double overhead camshaft (DOHC) four-valve FVA in 1966, when Cosworth, with a help from Chapman, convinced Ford to purchase the rights to the design, and sign a development contract – including an eight
3109061
Cosworth


with Ford in 1969, by developing a double overhead camshaft (DOHC) 16-valve inline four-cylinder engine for road use in the Ford Escort. As Keith Duckworth was busy designing and developing the DFV, the project was assigned to Mike Hall, who created the 1601 cc BDA on the Kent block for homologation purposes. The camshafts were driven by a toothed belt developed for Fiat 124, hence the name BDA, literally meaning "Belt Drive, A type". It was designed for FIA Group 2 and Group 4 on
3109086
Ford Indigo


V12 48 valve DOHC engine which uses the pistons, rings, rods and the valve train from Ford's Duratec V6 engine found in the Taurus and Mercury Sable. The engine has no relation to the V12 used in the GT90 concept unveiled a year earlier (using parts from the Modular V8), despite both having the same displacement. The engine has a power output of at 6,100 rpm and of torque at 5,250 rpm. This engine would later go on to power many cars manufactured by Aston Martin which was owned by Ford
13864275
Harmonic damper


excessive harmonics and therefore may use a solid undampened device. Modern (roughly 1988+) DOHC, SOHC Flat 4, Flat 6, Flat 8, Flat Plane V8 have no need for this device. Over the years many of these engines use solid cast iron or aluminum crank pulley or audible NVH damper (reducing engine noise heard in the occupant compartment). Audible NVH has been the biggest factor in OE manufacturer decisions throughout the vehicle. In addition the pulleys on these engines are mounted loosely with a location fit negating any
22097938
Variable Cam Timing


, and vehicles with VCT on the exhaust camshaft do not require exhaust gas recirculation (EGR) as retarding the exhaust cam timing achieves the same result. VCT on the intake camshaft is used primarily for increasing engine power and torque as the PCM is able to optimize the opening of the intake valves to match the engine conditions. VCT is used in Ford's Triton 5.4L 3-valve V8 engine, the Australian Barra 182 and 240 Inline-6s, and Ford's 4.6L 3-valve V8 engine used in the 2006-2010 Ford Explorer and 2005-
12030800
Porsche


in the company's engine development division. Fuhrmann was responsible for the so-called Fuhrmann-engine, used in the 356 Carrera models as well as the 550 Spyder, having four overhead camshafts instead of a central camshaft with pushrods, as in the Volkswagen-derived serial engines. He planned to cease the 911 during the 1970s and replace it with the V8-front engined grand sportswagon 928. As we know today, the 911 outlived the 928 by far. Fuhrmann was replaced in the early 1980s by Peter W. Schutz, an
4738948
Tappet


also tended to accelerate wear on the expensive camshaft. Tappets then developed plain flat ends, although these were slightly radiused as 'mushroom' tappets, since a perfectly flat end led to 'slamming' against a steep camshaft face. To reduce wear from the rotating camshaft, the tappets were usually circular and allowed, or even encouraged, to rotate. This avoided grooves developing from the same point always running on the same point of the camshaft. In a few engines, particularly small V8 engines with little space, the tappets
732420
MV Agusta 203/220 Bialbero


succeeded by a fully-fledged 250cc machine, the MV Agusta 250 Monocilindrica Bialbero. The 203 Bialbero had an air-cooled, single-cylinder, four-stroke engine with double overhead camshafts (DOHC). The camshafts were driven by a gear train. The valves were at an angle of 90° to each other and were closed by hairpin valve springs. The bore and stroke were 68 mm × 56 mm, giving a engine displacement of 203.4 cc. After the Isle of Man TT, the bore was increased
17661410
BMW M50


powered by the S50 engine series, which is a high output version of the M50. A significant advance over its M20 predecessor, the M50 features dual overhead camshaft (DOHC) with four valves per cylinder (the M20 has a single overhead camshaft with 2 valves per cylinder), coil-on-plug ignition, a knock sensor and a lightweight plastic intake manifold. Both engines use an iron block with an aluminum alloy head. The redline is 6,500 rpm (except for S50 models), the same as the final
18029636
Nissan QG engine


cylinder engine with capacity and DOHC control. Bore and stroke are . Output is at 6000 rpm and at 4400 rpm and later at 6000 rpm. This engine is used in: Power outputs for N16 Almera: The QG16DE is a straight 4-cylinder engine with Double Over Head Camshafts with 16 valves. The cylinder head also features Nissan Variable Cam Timing (N-VCT) and micro-polished camshafts. A new water pump assembly has been designed for the QG16DE; the design is based on the water pump from the GA16DE,
18498901
Saturn I4 engine


on the oil pump housing. The SOHC and DOHC engines used different timing chain sets. The SOHC (LK0/L24) cylinder head had 8 valves and was made of lost foam cast aluminum. The camshaft was located in the center of the cylinder head and driven by a chain off the front crankshaft sprocket. Motion from the camshaft was transmitted to the eight valves by the hydraulic lifters and rocker arms. The LK0 engine first used TBI (Throttle Body Injection) for fuel delivery and was rated at at 5000 RPM and
6092665
Ford Sigma engine


heavily modified 1.6 L engine block and features Variable Cam Timing on the inlet camshaft. This displacement has only been used in Ford Puma. In 2000, Ford of Brazil developed a cheaper version of the Zetec-SE engine, to compete with the classic Volkswagen EA827 engine series known locally as AP (from "Alta Performance", "High Performance", in English) engine in Brazil. It is 8v SOHC instead of 16v DOHC and its block is made of iron instead of aluminum. Also, its camshaft is driven
6394797
Ford Cyclone engine


variant, the Lincoln MKX, as well as the Lincoln MKZ. Mazda badges its versions of the Cyclone MZI as it did with its versions of the "Duratec V6". Although Ford continues using the Duratec name, the Cyclone shares no components or design with the previous Duratec and was entirely new. Notable Cyclone features include a capacity for displacements ranging up to 4.0 L, DOHC 4-valve per cylinder heads, direct acting mechanical bucket (DAMB) camshaft tappets, variable cam timing (iVCT) on the intake camshafts, and
6806418
BMW N62


of the Year", "Best New Engine" and "Above 4-litre" categories. Compared with its M62 predecessor, the N62 also has double-VANOS (variable valve timing on both the intake and exhaust camshafts). As per the M62, the N62 has double overhead camshafts (DOHC) with four valves per cylinder, an aluminium engine block, an aluminium cylinder head and fracture-split forged powdered metal connecting rods. The redline is 6500 rpm. The N62B36 is a version producing at 6,200 rpm and at 4,250
8330728
Audi R8 (Type 42)


RS4, but is modified to use a dry sump lubrication system. It uses two chain-driven double overhead camshafts (DOHC) per cylinder bank, and utilises variable valve timing for both inlet and exhaust camshafts. The 4 wheel drive system is biased towards the rear; it sends 30% of its power to the front wheels and 70% to the rear. Audi AG unveiled the Audi R8 V10 on December 8, 2008. It uses a FSI V10 engine, based on the unit in the Lamborghini Gallardo LP560-
8840448
Toyota UR engine


to the Lexus IS-F, RC-F, GS-F and LC 500. It is an all-alloy DOHC, 4 valves per cylinder with Yamaha-designed high-flow cylinder heads, titanium inlet valves, high-lift camshafts and dual-length intake. It has D4-S gasoline port and direct injection, Dual VVT-i with electric VVT-iE inlet camshaft actuation. Bore and stroke is . The engine has a redline of 7300 rpm. In the IS-F the engine had an 11.8:1
9908598
Toyota JZ engine


The Toyota JZ engine family is a series of inline-6 automobile engines. A replacement for the M-series inline-6 engines, the JZ engines were 24-valve DOHC engines. The JZ engine was offered in 2.5- and 3.0-litre versions. The 1JZ version was produced from 1990 to 2007 (last sold in the Mark II BLIT Wagon and Crown Athlete). Cylinder bore and stroke is . It is a 24-valve DOHC engine with two belt-driven camshafts. Output for the early non-turbo (1990–1995) 1JZ-GE was at 6000
11033184
World Gasoline Engine


between adjacent liners). By using cylinder liners the engine's bore can be altered, therefore the displacement as well, just by adding a different set of cylinder liners. The engine also features an aluminum cylinder head with double overhead camshafts and variable valve timing. The 1.8L I-4 is a dual overhead cam (DOHC) inline 4-cylinder gasoline engine capable of and of torque. The engine has displacement of with a bore of and a stroke of . The compression ratio is 10.5:1. The 1.8L DOHC inline 4-cylinder engine served as the
12860544
Overhead camshaft


models between 1921 and 1923 and introduced one of the world's first production DOHC auto engines in 1924 – the Sunbeam 3 litre Super Sports, an example of which came second at Le Mans in 1925. The first DOHC engines were either two- or four-valve per cylinder racing car designs from companies like Fiat (1912), Peugeot Grand Prix (1912, four-valve), Alfa Romeo Grand Prix (1914, four-valve) and 6C (1928), Maserati Tipo 26 (1926), Bugatti Type
17385310
Saturn I4 engine


in 1998, some vehicles would require this repair more than once, and replacement cylinder heads could develop the same crack. It was estimated that between 2% and 5% of SOHC Saturn S-Series vehicles were affected by this defect. DOHC engines had a different cylinder head, and did not suffer the same issue. The DOHC cylinder head had 16 valves and was made of lost foam cast aluminium. The camshafts were held in the cylinder head with bearing caps and driven by a chain off the front crankshaft sprocket.
6092669
Jaguar AJ-V8 engine


provided by two, cam driven high pressure pumps which are driven by a dedicated camshaft. The high pressure pumps supply the fuel rails which in turn supply the three injectors for that bank with fuel at a controlled pressure. The four camshafts incorporate VCT (variable camshaft timing). VCT allows the timing of the intake and exhaust valves to be adjusted independently of each other. The VCT system is controlled by the Bosch ECM (engine control module) using information from CMP (camshaft position) sensors. The supercharger is located in
17794433
Ford Modular engine


advantages, the engine was also lighter than the older 5.0L V8. Following the Modular V8's debut in the Town Car, engines using the Modular architecture would go on to replace older V8 designs in Ford products, eventually becoming Ford's chief gasoline V8 (and V10) architecture. The displacement 90-degree V8 has been offered in 2-valve SOHC, 3-valve SOHC, and 4-valve DOHC versions. The engines were also offered with both aluminum and cast iron blocks, depending on application. The 4.6 L's bore and stroke are nearly square
15307491