78 or 90mm fast
78 or 90mm fast hey guys/gals. have a 2002 z28 (ls1) with the ls6 intake, fast claims that their intake produces 15-20 addition hp. my question is which one should i buy or u recomend.
and which throttle body.
and which throttle body.
I'm running the FAST 90mm intake with the Nick Williams 90mm TB, and that is what I would recommend for your application. Stay away from the FAST 90mm TBs though. Too many people have had problems with the FAST 90mm TBs sticking.
On The Tree
Joined: Mar 2005
Posts: 150
Likes: 0
From: Southern UT
Stock tb size is 75mm...Don't waste money on a 78mm. If you are keeping the LS6 intake, take an afternoon and port your stocker and be done with it.
If you are going bigger, which I'd suggest since you are a (near?) full bolt on car with a cam and heads...get a Nick Williams 90mm TB with a Fast 90 Intake.
If you are going bigger, which I'd suggest since you are a (near?) full bolt on car with a cam and heads...get a Nick Williams 90mm TB with a Fast 90 Intake.
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Originally Posted by z28drag
sorry
224/224 112, esp heads, hooker headers, 4" exust spintec and a full line of bolt ons ,
dynoed last week 425rwhp
224/224 112, esp heads, hooker headers, 4" exust spintec and a full line of bolt ons ,
dynoed last week 425rwhp
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Go with the 90mm because you'll just end up buying it twice when you want to upgrade again! And we all want to upgrade again. I have the Fast 90mm TB and I am not happy. The first one I bought had to be returned and the one I have now needs a return spring just to get it to shut. Buy the 90mm intake but buy a different 90mm TB.
On The Tree
Joined: Mar 2005
Posts: 150
Likes: 0
From: Southern UT
Yes, or any other 90mm other than FAST really. FAST TB's stick open, the company knows it but they won't fix it. They tell you to put on some spring to close it! Nick Williams TB is a great piece and there are many others out there but NW is the one that pops into mind.
