Location: Brisbane - Chapel Hill
Registered: June 2002
Re: 2TGEU Exhaust Advice Needed
Sun, 09 February 2003 22:11
It's not back pressure one requires for an NA engine, no one wants that. The risk of increasing your exhaust size too much however, is the reduction of _exhaust gas velocity_. Reducing exhaust gas velocity decreases the scavenging effect of your extracters ... and so you may lose some or all of the advantage you had by increasing flow.
Greater than 2" on a small NA car is pretty pointless for this reason.