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rich weyand · 08-02-2015, 12:06 PM

2.5" pipe will flow 550 cfm. A 350 at 5000 rpm can flow maximum of 500 cfm at a volumetric efficiency of 1.0, which is an unattainable ideal.

2.5" is plenty.

08-02-2015, 12:06 PM	#4
rich weyand Registered User Join Date: Apr 2014 Location: Bloomington Indiana Posts: 1,041	Re: Correct exhaust size? 2.5" pipe will flow 550 cfm. A 350 at 5000 rpm can flow maximum of 500 cfm at a volumetric efficiency of 1.0, which is an unattainable ideal. 2.5" is plenty. __________________ Rich Weyand 1978 K10 RCSB DD.