[Draco-REX]

Originally Posted by sw20kosh

A turbo responds to big exhausts better because of the pressure differential across the turbine (ie you want as much exhaust pipe volume post-turbine so those exhaust gases pass over the blade faster and more efficiently).

That being said, people tend to forget that with superchargers: the more free flowing the motor becomes the less boost the supercharger will create at a given fixed pulley size. (A turbo compensates for a better VE because it is controlled by a set boost level not a set pulley diameter. This always creates more power)

For supercharger applications to truly realize the potential of an increased exhaust flow mod you would need to size the pulley to gain back that boost pressure.

However, even with the boost drop due to increased VE, making the engine more free flowing produces power. You may see the same whp after the exhaust mod but once you correct the boost drop, your whp will obviously go up.

Doesn't that only count for cars with an overlap cam? And does the FA20 have overlap?