#9427, "RE: 2 questions For Ya Smart People" In response to In response to 3
the muffler is about 5 hp, but it does help the car breathe better at the top end.
the best launch is (in my opinion) rev to just a hair above 4K and let the clutch out easy, sort of in between a slip and a dump (like you normally would on the street) and modulate the throttle so you only chirp the tires (don't spin them). that will give you a good honda beating launch
