Quote:
Originally Posted by Snakes709
Correct me if im wrong because im not sure how the 370z handles the size of exhaust. But with my Supercharged Cobalt. Aftermarket exhaust with 2.5" piping was good until 270whp....anything more it was recommend 3". I was making 20psi of boost on a Harrop TVS 1320...ran stock exhaust at 265whp and it restricted alot. Changed to a 3" downpipe and 3" exhaust and it bumped it up to 281whp. No disrespect intended but does your statement still stand or no? Like i said i dont know how the 370z exhaust, since its dual, handles the size. I'm guessing since its dual that theory still applies but to a greater number....for example, 400whp.
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Volume of 2 x 2.5" exhaust is 9.8 sq/in.
Volume of single 3" exhaust is 7.0 sq/in.
The dual intake / dual exhaust will carry more air mass with less restriction than the single exhaust on your supercharge 4-cylinder did, regardless of boost level.