Exhaust on Type S

[stevanbonic]

hmm, just to throw some math into the mix......

torque or moment is a roatational force and is the sum of force times distance.

now when you get aftermarket headers, you reduce backpressure hence reducing forces acting contrary to the cylinder vector direction. less backpressure means more F (force) hence increasing torque which is clearly seen in the dyno sheet provided by type S.

i can see type s's point of view stating that you can custom build a header to increase the low end figures on the dyno, however to acheive the magnitude of increase seen in the high end would be impossible simple because of the effect of inertia of a higher spinning engine. the flywheel and self weight of the internals themselves would act as a force acting with the direction of the cylinders hence their combined torque acts against backpressure and is the reason why the torque increase more so at the high end. of course this increase in torque is very minor compared to increasing displacement for example as TYPES suggested, but it does exist.

Also As Toda has stated, their headers do infact increase your torque across the whole rev range, and this is also supported by your dyno sheet. the output in KW is related to the torque curve as the dyno power figures is what is being transferred to the dyno wheel, hence torque curve = output times rotation of the dyno wheel.

this is just an obeservation from an engineering POV, all im saying is that torque can be created and this is the reason. where the torque occurs is a function of the pipe design (TYPES). if i am incorrect rebuttal is welcome as i, like everyone else here is here to learn.