what kind of engines are in nascar cars
Monster Energy NASCAR Cup Series The cars are powered by EFI V8 engines with compacted graphite iron blocks and pushrod valvetrains actuating two-valves per cylinder, and are limited to 358 cubic inches' (about 5.8 liters) displacement. However, modern technology has allowed power outputs near 900 horsepower (670 kW) in unrestricted form while retaining the conventional basic engine design. In fact, before NASCAR instituted the gear rule, Cup engines were capable of operating more than 10,000 rpm.[31] A NASCAR Cup Series engine with the maximum bore of 4.185 inches (106.3 millimeters) and stroke of 3.25 inches (82.55 millimeters) at 9,000 rpm has a mean piston speed of 80.44 fps (24.75 m/s). Contemporary Cup engines run 9,800 rpm, 87.59 fps (26.95 m/s), at the road course events on Pocono Pennsylvania's long front stretch and at the .526-mile short-track Martinsville Speedway. At the backbone 1.5- to 2.0-mile tri-oval tracks of NASCAR, the engines produce over 850 hp running 92–9400 rpm for 500 miles, 600 mi for the Coca-Cola 600 Charlotte race.
JR Motorsports JR Motorsports is an American professional stock car racing team that currently competes in the Xfinity Series. The team is based in Mooresville, North Carolina, co-owned by Monster Energy NASCAR Cup Series driver Dale Earnhardt Jr., his sister Kelley Earnhardt Miller, and the owner of his Cup ride, Rick Hendrick. The team currently fields four full-time entries in the Xfinity Series: the No. 1 Chevrolet Camaro full-time for Elliott Sadler,[1] No. 5 Camaro full-time for Michael Annett, the No. 7 Camaro full-time for Justin Allgaier, the No. 9 Camaro full-time for William Byron, and the No. 88 Camaro part-time for Dale Earnhardt Jr. and Kasey Kahne.