Disturbed Bird

iTrader: (9)

im building a 402 ls2 and i already have a ported fast 90 from vengeance racing and a NW 90mm Tb. im looking to get a procharger from EPP and i want the f1 head. will my fast 90 hold up or do i need to use a different intake manifold. and witch one?

speedracer5532

iTrader: (8)

I am running a ported fast with a F1A and have ran 17.5 lbs through it with no problems.

Urban Legend

iTrader: (5)

Most guys here are running the LS6 intake with the stock ported throttle body.

Disturbed Bird

iTrader: (9)

im just wondering b/c people say not to run the fast intakes because they crack or blow out the back on high boost. are they right or is it just with some people?

Andrew1989

iTrader: (4)

I believe ive heard they can leak under boost, correct me if im wrong please.

Urban Legend

iTrader: (5)

I have personally never seen a FAST intake crack or blow out. But I the say time I have seen the LS6 intake/polished throttle body get the job done time after time. Stick with the ls6 intake and polished throttle body and spend that 1110.00 elsewhere.

Inspector12

iTrader: (29)

If you have it use it.I have only herd of a couple cracking under Extreme boost 25+ lbs and the leak issues I have seen when not properly installed, but not a comon problem just most FI people spend the $ else where because the LS6 has done the job very well for a long time etc...

Urban Legend

iTrader: (5)

My bad. I didn't read your post close enough to notice that you already have the set-up. If you have it, then use it.

EPP

iTrader: (22)

Since you already have the FAST intake, I'd go ahead and use it as well. There aren't too many good alternatives out there to use with a 90mm throttle body. Bob

Blownramair

Im still using the stock ls1 TB

MY99TAWS6

iTrader: (3)

I read of a few guys having problems past 20psi. I never plan on going past that psi and liked the idea of the direct port option on the fast and it does take the 90 tb.
I would also think it might be beneficial on some bigger engines like the 427 mabye even 454 I might go with.

BlackScreaminMachine

iTrader: (17)

I plan on my LS6 intake, ported tb and a z06 cam with the D1 procharger,

Disturbed Bird

iTrader: (9)

cool thanks i didnt plan on going past 17psi so it shouldnt be a problem then. thanks.

kp

iTrader: (34)

If you have it I would run it, bigger CID and a bigger blower would probably see some benefit. I ran a 90/90 for a while and didnt see much difference but that was with smaller heads and cam and sold it off so I could buy a bigger blower which most definately made a difference I have read about some leaking issues with over 20psi but mine was fine at 14-16psi.

52172

iTrader: (2)

tony mamo just helped with a supercharged vette in the dyno section and they got 768 rwhp on only 14 lbs boost with meth out of a little old 346 with a mamofied 90/90. If you don't plan on hitting 20 lbs boost go for it.