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fast vs ls6 intakes....

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Old Mar 10, 2005 | 12:38 PM
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Default fast vs ls6 intakes....
as i was thinking of getting a fast intake... i have seen too many problems that people have been ahving with the fast intake.... warped manifolds... sounds like really poor quality control....

what kind of horsepower gains did everyone get that have switched from ls1 intake, to ls6..... just looking around still.... ls6 seems to be the way to go.. becasue of the quality... and its really been proven.... also ls6 is cheaper from what i have been seeing....

maybe looking to go with a mild cam later on... maybe some nitrous... airlid... bellow.. free mods... maybe new heads....

anyone have any dyno charts before/after ls6 intake?

thanks

Dan
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Old Mar 10, 2005 | 01:24 PM
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LS1 to LS6 is good for 15rwhp. More or less, depending on your mods. More mods, you'll see a bit more gain.
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Old Mar 10, 2005 | 01:51 PM
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I gained 8.3rwhp/5.7rwtq on a mustang dyno with mine. That was with K&N and TSP lid already installed
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Old Mar 10, 2005 | 02:25 PM
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thanks for the info so far... looking for more info tho.... anyone else have any ideas/info upon this?
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Old Mar 10, 2005 | 02:43 PM
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I think a LS6 is good for about 10rwhp, the fast is a little more. I wouldnt get a FAST unless you pretty much run out of mods and want those few extra ponies. You can also get the fast 90mm tb, which is also good for some ponies.
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Old Mar 10, 2005 | 02:49 PM
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Originally Posted by Cefiro
I think a LS6 is good for about 10rwhp, the fast is a little more. I wouldnt get a FAST unless you pretty much run out of mods and want those few extra ponies. You can also get the fast 90mm tb, which is also good for some ponies.
I don't seen the need to spend the cash for the FAST unless the air requirements demand a bigger TB. If I am wrong, let me know.
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Old Mar 13, 2005 | 07:02 PM
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the f.a.s.t intake is good but they do have problems with a whistle sound. one thing to remember is not to change your t.b. unless you have a head and cam package or serious amount of horse power. the stock one is good up to about 400-425 h.p. now before anyone gets all bent about this coment don't worry. i work for g.m. i know the specs. changing the t.b on a ls1 that is mostly stock could lean it out. i have seen a decrease in ets. because of this so be carefull. weiend makes a great polished intake that deliveries about 10-12 rwhp. its about $849.00 give or take a bit. much of that is because of the polish but i still have it. gl guys.
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Old Mar 13, 2005 | 07:59 PM
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I saw 10 rwhp with my LS6 intake.
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Old Mar 13, 2005 | 08:26 PM
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between the ls6 and 78mm fast, def. go with the ls6. you won't get that much more h.p from the 78mm fast, if any at all. and if you do get those couple extra h.p, it won't justify the price difference. the 90mm fast intake is a different story.
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Old Mar 13, 2005 | 10:48 PM
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Originally Posted by wrath22
the f.a.s.t intake is good but they do have problems with a whistle sound. one thing to remember is not to change your t.b. unless you have a head and cam package or serious amount of horse power. the stock one is good up to about 400-425 h.p. now before anyone gets all bent about this coment don't worry. i work for g.m. i know the specs. changing the t.b on a ls1 that is mostly stock could lean it out. i have seen a decrease in ets. because of this so be carefull. weiend makes a great polished intake that deliveries about 10-12 rwhp. its about $849.00 give or take a bit. much of that is because of the polish but i still have it. gl guys.
A ported TB is good for about 7-10rwhp on a mild cammed setup. As for leaning out, that's why we have tuning. Weiand makes a nice heat soaking polished intake that costs way more than a simple LS6 stocker that could be purchased used for under $300 and new for just a few more $$$.
As for the whistling FAST90mm, it has its issues, but puts down really good power.
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Old Mar 15, 2005 | 12:20 PM
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What intake manifold does the 04' GTO have? LS1 or LS6? Thanks!
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Old Mar 15, 2005 | 12:27 PM
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guess i'm going with ls6 because of better build quality... price.... and it still adds horse...

Thanks guys...

Dan
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Old Mar 15, 2005 | 01:26 PM
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Default fast vs ls6 intakes....
Check my thread today. I just replaced my LS6 with a FAST. Picked up 17 HP and 18 TQ. My car is a modded C5 346 A4.
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Old Mar 15, 2005 | 01:49 PM
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what mods do you have on your motor DBN?

also how do you know you had ls6 intake before?

Thanks

Dan
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Old Mar 15, 2005 | 02:15 PM
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The problems that FAST is having is the reason I havent bought one of their products already.
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Old Mar 15, 2005 | 04:11 PM
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i went with the ls6 intake for the pure reason that i dont want to spend the extra money for an extra few ponies. IMO, it wasnt worth it.
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