2" too small?

rob_w · tinkerer Joined: 19 Feb 2002 Posts: 395

hi all,

just after some opinions....
im runing a high-comp 2ltr with a single 38dgms, and a 'medium street' crow cam. i have a set of 4-2-1 extractors that lead to a 2" exhaust. the trouble is, when it get to around 3500 rpm, right in the middle of the torque curve, it doesnt make any more power. the cam [on paper] stops making power at 6500rpm, and the carby+ports are huge, so that leaves me with one option..the exhaust is too small.

i could go and get a 2.5" fitted, but the extractors i have end in a 2" outlet. the extractors were originally fitted to the g200, but im concerned that having a 2" outlet leading to a 2.5" pipe would be a waste of time, due to the restriction at the end of the extractors.

what do you guys think??

thanks,

rob.

Gene FJ20DET · Posted: Tue Jul 01, 2003 4:32 pm Post subject: Re: 2" too small?

go 4-1 tuned extractors and a 2.5 system

i had what u have now and went to that ^^(above) and was NEAP noticable in diefference
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rob_w · tinkerer Joined: 19 Feb 2002 Posts: 395

NEAP???? wtf??

ok, 4-1 to a 2.5"

ill look into it.

thanks,

rob.

Adam · Site Admin Joined: 04 Oct 2001 Posts: 682

I'd be looking at jetting and the ignition advance curve first, make sure everything else is sorted.

Gene FJ20DET · Posted: Tue Jul 01, 2003 5:38 pm Post subject: Re: 2" too small?

u obviously dont understand gene-lish

i mean HEAPS
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