Dota 2 is really bad for learning English , what are you talking about ? <| sep |> HD 598 cs vs HD 650 Do you think the 598 cs performance is better under certain scenarios , that requires a closeback approach ? <| sep |> Someone didn ' t read the content . <| sep |> I agree , great music enhancement at lowmedium doses , specially with added cannabis . Great for dancing too ! <| sep |> To make ITB ' s run correctly basically requires an alphaN style metering system in the ECU . It uses RPM and throttle angle to estimate cylinder filling . No MAP or MAF sensor . Not only is it a gigantic pain in the ass to get an ECU calibrated correctly with this type of system , they don ' t do well with barometric pressure changes . They also suck at transient throttle metering coming off idle . Like , if you ' re at a certain RPM at a certain throttle opening , the ECU can guess how many grams of air per intake stroke the cylinder is inhaling . If you whack the throttle open halfway through that intake stroke , it has to straight up guess how much extra air just got into the cylinder . This will obviously be a different amount at 3 k RPM vs 8 K rpm . You also have to take exhaust scavenging into account . Different air densities will change resonance characteristics of the engine , which is tough to model on anything short of a motorsport grade ECU which start at $ 5 k and take dozens upon dozens of hours of dyno time and even more real world time to get calibrated . TLDR to make them run consistently you need access to a dyno with unlimited time and an ECU that costs more than most engines .