ls6 or fast?
Came in here to post about a horse that had been beat to death, re-incarnated then beat to death once again...then I saw the "turbo."
Can offer that the best place to ask is in the forced induction section. However, the FAST really shines when used on engines w/ larger than stock cubes. For this reason, because you are using a turbo, the FAST is probably the better choice; more air movement than a stock LS1.
This may also be an area where a gently ported (cleaned up) LS2 intake can benefit the set up for a lot less money. Have seen gently ported LS2's perform similar & @ times better to an LS6 intake on stock cubes when non-ported LS2 intakes (mold ridges/edges in the runners restrict airflow) generally do not. With a turbo, a cleaned up LS2 intake can be a great choice.
Spend that 1k elsewhere in suspension or fuel system.
Op, post this exact same question in the forced induction section and see what those folks have to say, because I can easily tell that the majority of the people in this thread are not around boosted stuff.
https://ls1tech.com/forums/forced-in...induction.html
10 pages on this with no real answer to that question. I'd probably stick with the LS6.
I've also read threads on the corvette forums where FI guys switched to FAST intakes and gained nothing on the dyno.
10 pages on this with no real answer to that question. I'd probably stick with the LS6.
I've also read threads on the corvette forums where FI guys switched to FAST intakes and gained nothing on the dyno.
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Teching In
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I definitely want a fast 92 eventually, its on my to get list anyway. Maybe if I'm good mr.c will bring me one for xmas lol. Doubtful. Anyway I have a pair of warhawk heads 235cc 72cc cchambers. Do anyone use or know someone who does? If so do they likem?
It's already been done...several times. So, no need. IDK why the FAST/LS6 debate comes up so often. There is a library of info on the subject in the archives.
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Related to my reply a few posts up (not this one), after thinking about it can't see how one intake would be an advantage over the other when related to FORCED induction.
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It's already been done...several times. So, no need. IDK why the FAST/LS6 debate comes up so often. There is a library of info on the subject in the archives.
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Related to my reply a few posts up (not this one), after thinking about it can't see how one intake would be an advantage over the other when related to FORCED induction.
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Related to my reply a few posts up (not this one), after thinking about it can't see how one intake would be an advantage over the other when related to FORCED induction.
you have a pretty stout h/c car and make 414. theres no reason with a fast combo PORTED that you couldnt make 440-445 which would be a 25030 hp gain plenty of people do it and have posted results just search in the dyno section.
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I see the posts on here. I was just saying I have never seen that kind of a gain in person. Maybe in a couple months ill get one if I get bored with the car.
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Teching In
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Well idk what the difference in dyno numbers would be,but I can say that every time I go to the track seems like most the ls1 are using the fast, na or fi. My only concern was since I don't have the funds for the fast atm could I get by on the ls6 for the time being. I got my answer indeed lol. But the fast must be worth some hp cuz alot of folks usem.
Well idk what the difference in dyno numbers would be,but I can say that every time I go to the track seems like most the ls1 are using the fast, na or fi. My only concern was since I don't have the funds for the fast atm could I get by on the ls6 for the time being. I got my answer indeed lol. But the fast must be worth some hp cuz alot of folks usem.
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Teching In
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I'll definitely own one asa I get the extra $$$, ill check ebay or the classifieds on here.
just can't wait to get this thing done, as I've stated before this will be the first fi car I've ever had so looking forward to see wha t awsome hp really feels like under my foot lol. Guess everyone's been there before
just can't wait to get this thing done, as I've stated before this will be the first fi car I've ever had so looking forward to see wha t awsome hp really feels like under my foot lol. Guess everyone's been there before 
Another `option` that can be looked at is the TPIS mod to your existing LS6 manafold.The 78mm opening is the limiting factor in this manafold not the runners when used on a stock ci LS1.If you decide that your going to up your ci in the future then spend the extra money on the fast,other wise,this could be a viable option for you.
