quote:
Originally posted by Quest:
While I personally cannot tolerate automotive exhaust noise (excessive), I beg to differ RE: less restrictive exhaust flow = HP.
Reasoning as follows:
Have you ever look at Honda S2000's design, even with factory stock cat and muffler, this car is known to produce 100hp/1litre in N/A configuration (stock exhaust and intake). Have you tried installing aftermarket exhaust to see how see what sort of gain you got? I have (not on my car but someone in my pool of "autophools" did it and then dyno'ed it) and the hp dropped considerably (HKS manifold, cat bypass, low restriction HKS muffler, etc.).
And you wonder why there are so many "loud" systems out there that would accelerate slower than your ordinary "cat-in", "restrictive" exhaust system?
Note: think "exhaust scavenging" within a particular N/A gasoline engine.