| Re: exhaust systems ..... |
Subject: Re: exhaust systems ..... by jonszr1 on 2010/10/29 0:27:50 my 90 zr1 is ported inj housings and plenum, headers, fidanza fly wheel,henderson tune , and a custom dr gas exhaust with spin tech mufflers with xpipe .its a 21/2in system ,410 gears ,that car has gone 12.10 @119.85mph the other is a callaway 475super natural , that i added headers to,its has 3.90 gears and a fidanza flywheel, bought the car with a corsa at that time the best the car ran was 12.48@116.19 mph. installed a 23/4 desert development exhaust i bought used added 3 ininlet super turbos with 21/2 in dual outlets.and puut the stk zr1 tips from a stk exhaust and the car has gone 11.94@117.90 mph in 95 deg weather .to be honest part of the et improvement was switching over to the new nitto drag radials . but a almost 2 mph improvement in much lousier weather conditions. let me know i was on the right tract. this exhaust doent have an xpipe persaybut it has t 3 in by 2 in tall what looks like thick rulers that go from one pipe to the other where the pipe bend to go down the tunnel . i am thinking of getting one of those narrow xpipe from summit and see what it does . this system is as quiet as a stk system with headers . i dont have cats on either car as i live in the only county in california that doesnt have to smog every 2 years . |
