Do I need a FAST 90?
Do I need a FAST 90? I've decided on the cam, now I'm starting to gather all the parts. The cam is a 224/228 .637/.639 110LSA. Not too sure about the heads yet, but I will probably be going with a set of TSP's PRC LS6 ones or waiting till I have enough for a set of AFR's. Should I be looking for a 90/90 setup or will an LS6 suffice? How much power will I be leaving on the table if I went with the LS6? If I should go with the FAST, should I have it ported? Thanks for the opinions and suggestions.
-Marc
-Marc
Last edited by Marc '99T/A; Sep 19, 2006 at 04:50 PM.
you will be making around 10~15rwhp with the fast over the LS6
if you port the fast, possibly add up to 10rwhp on top of that
(porting will cause you to lose a lot more low end torque and make the the high end insane)
if you port the fast, possibly add up to 10rwhp on top of that
(porting will cause you to lose a lot more low end torque and make the the high end insane)
my personal views are that the LS6 is fine. yeah you will loose some hp but the 90/90 is expensive and ive seen some issues with the FASTs
also if you have $1200 to spend on a throttle body and intake.. why not spend around $1600 on a sheet metal intake and throttle body that has more gains?
also if you have $1200 to spend on a throttle body and intake.. why not spend around $1600 on a sheet metal intake and throttle body that has more gains?
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Wow, 40hp from a manifold. The FAST should be all you need, just make sure you get the 90/90 setup. Love to see how you calculate what the heads will do. Lol just messing with you, but seriously, save up and get AFR's, don't waste your money on anything less.
Originally Posted by Marc '99T/A
So.... LS6-about $450. FAST-about $875 = $425 difference. Plus another $250 to port = $650 difference for 20-25 rwhp. Hmmm.... 
Originally Posted by WhiteStripes
Wow, 40hp from a manifold. The FAST should be all you need, just make sure you get the 90/90 setup. Love to see how you calculate what the heads will do. Lol just messing with you, but seriously, save up and get AFR's, don't waste your money on anything less.
You must be seriously kidding....
