F4iGuy

98 vette
LS 1 stock cubes
prc 2.5 ls6 heads
228r 114lsa cam
all the supporting mods (headers, pulley, 3.90 gears, injectors, etc)

I currently have an LS6 intake and BBK tb. Should I do Ported fast 90/92? 102 stock or ported? TB size? I'm guessing a ported 102 is overkill?

SweetS10V8

iTrader: (4)

If your looking for more power over the LS6. The FASTis the way to go. Sell your current setup and buy either a used 92/92 setup or a new 102mm intake and 92mm throttle body.

Jon@Texas-Speed

iTrader: (18)

If you are looking for more power, the FAST 102mm is probably your best bet if you are looking to purchase something new. A FAST 92mm intake/tb would be a good choice too if you can find one. I wouldn't spend your money on anything less than one of these intakes. Others IMO aren't worth the money over a LS6 intake.

Jon

garygnu

stick with your current set up.

Detoxx03

iTrader: (14)

Get a FAST and be done with it

fatmat80

many people have gotten away with a fast 102 intake and a nw 92 mm tb..however fast says that the 102/102 combo is not overkill..either of these setups would out perform the ls6 though hands down.

berlin 83

iTrader: (13)

i have a similar setup im running prc 2.5's, a torquer v3, and just went to a fast 102/102,104mm lid, mafless SD tune. i made 425 rwhp through a 5000 stalled auto, i love the intake

Squirts11

iTrader: (14)

Lol. Obviously FAST isn't going to say their product isn't ideal for an LS1 (honestly, it may work great), that would be bad marketing.

Hey Jon@texas-Speed,

While I know that ls2 fuel rails are needed with the newer 102mm intakes, and shorter valley cover bolts as well, is anything else is needed? Are most aftermarket TB's that will work w/ the FAST's the stock drive-by-cable design? Would they need new sensors or would the stock LS1 tb sensors be a direct swap?

Thanks

SweetS10V8

iTrader: (4)

They do work great even on stock LS1s. The runners they designed work well, they dont loose any torque and start to pull away from every other intake at about 3500-6800. With the removable runners there is always the possiblity of some race runners. The race runners would loose some low end torque, but gain high even more power and RPM capability.

You need the shorter valley cover bolts, the correct throttle body bolts, the correct fuel rail hold down bolts. The GM ones can be too long and damage the intake.

The stock IAC and TPS "should" transfer over to most aftermarket TBs. I know they do on the FAST TBs, my brother just got one.

Reaperchild

question here is to ask ur self .... is 10-30hp + extra tuning required worth the money ?? ... know it's gonna cost u a minimum of 800$ <-(consider yourself lucky) .... OVERALL .... UR RUNNING A STOCK 346 .... spend the cash on a larger ci motor .... IMO ONLY

zacht

iTrader: (18)

yeah money towards a new engine with more cubes would be ideal...but think about his combo now (even with the fast) and when it comes to get a new engine...all he would need is the shortblock...say a 370 or something...and he already has h/c/i that would be killer...im kind of planning the same thing now...

but im with a few people here...a used 90 or 92 is about the same price as a new 102/102...but its the other things that go with it..the tune..(possibly go sd or a bigger maf) and the lid...

ive also seen good results posted here about a 346 ls1 with a 102/92, picked up 8-9hp with intake change ONLY!