FAST LSX 90mm on an LS2?
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From: Chi-Town Western Burbs
FAST LSX 90mm on an LS2? Anyone installed the FAST 90mm intake manifold (only) on an LS2?? I've read plenty of threads with folks who've installed it on the LS1. Just wondering since I can get my hands on one fairly cheap. Track times and Dyno results would be a real bonus!! Thanks in advance!
Cheers,
Mark
Cheers,
Mark
Depends on the vehicle. The FAST will NOT bolt on to a C6 without modifications to either the car or the intake. There is also a fuel rail issue... the LS2 fuel rail doesn't fit without modification, and using the LS1 fuel rail will require some spacers and different injectors, along with injector adapter harnesses. Other than that, as ChucksZ06 mentioned, the throttlebody bolts right up; though you will need to use some longer bolts than what FAST provides.
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From: Chi-Town Western Burbs
Originally Posted by BurnOut
Depends on the vehicle. The FAST will NOT bolt on to a C6 without modifications to either the car or the intake. There is also a fuel rail issue... the LS2 fuel rail doesn't fit without modification, and using the LS1 fuel rail will require some spacers and different injectors, along with injector adapter harnesses. Other than that, as ChucksZ06 mentioned, the throttlebody bolts right up; though you will need to use some longer bolts than what FAST provides.
Cheers,
Mark
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From: toronto
Originally Posted by barkingspud
Guess I'll find out when I get the intake. I'll post the results as soon as I get it installed.
Cheers,
Mark
Cheers,
Mark
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I'm waiting on my SW headers and deciding on a cam and stall so, I won't get it tuned until I get all the parts in hand and installed which means you won't see the results just from the intake.
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From: Chi-Town Western Burbs
Originally Posted by STROKER R/T
if you what to step it up even more get nick williams 90mil T/B good for 10 hp and some bling
barkingspud- on the car that I am familiar with, they bent the LS2 fuel rail to work. However, it takes a considerable amount of effort and could easily futz up the rail, so be careful. The bolts used were just hardware store specials (since the FAST doesn't have threaded inserts in the intake, they use a through-bolt/nut setup).
so are we saying that the fast 90 on an ls2 in an 05 gto will make a considerable gain for the money or not. and it sounds like it is going to be a bit more work to get it to work right. How much hp or the stock intake are you guys guess that this thing will make.
jj- if the cam/heads are stock, I would expect much gain from a FAST intake (just like on an LS1 car); but if you have done a decent sized cam, I would expect 15-20 RWHP from the FAST.
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From: Chi-Town Western Burbs
Originally Posted by BurnOut
jj- if the cam/heads are stock, I would expect much gain from a FAST intake (just like on an LS1 car); but if you have done a decent sized cam, I would expect 15-20 RWHP from the FAST.
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From: Chi-Town Western Burbs
Originally Posted by BurnOut
barkingspud- on the car that I am familiar with, they bent the LS2 fuel rail to work. However, it takes a considerable amount of effort and could easily futz up the rail, so be careful. The bolts used were just hardware store specials (since the FAST doesn't have threaded inserts in the intake, they use a through-bolt/nut setup).
spud- the problem is that the LS2 injectors are a different height than the LS1 injectors (I think they're taller). So the fuel rail can't bolt down on the FAST intake because the hold down tabs don't reach. You could probably run an LS1 fuel rail and injectors, but the problem there is that the LS2 injectors use a different style plug, so you'd need to get some adapter harnesses (or hack your wiring harness) to plug the new LS2 injector plugs onto the "old" LS1 injectors.
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It might help if the overpriced FAST came in a LS2/C6+GTO version that doesn't require the mods. The LS2 is here to stay and the number of cars and trucks it will be in certainly warrants the developement of a new top cover. It's the same company as comp cams so it isn't like the cost of the developement should be a problem. I wish there was some good old American competition in the manufacture of such items to make these companies compete for the market share.
Bet the C6 and GTO will come with better manifolds on subsequent years as the LS6 manifold phased out the LS1 in 2001.
Bet the C6 and GTO will come with better manifolds on subsequent years as the LS6 manifold phased out the LS1 in 2001.
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From: Chi-Town Western Burbs
Originally Posted by BurnOut
spud- the problem is that the LS2 injectors are a different height than the LS1 injectors (I think they're taller). So the fuel rail can't bolt down on the FAST intake because the hold down tabs don't reach. You could probably run an LS1 fuel rail and injectors, but the problem there is that the LS2 injectors use a different style plug, so you'd need to get some adapter harnesses (or hack your wiring harness) to plug the new LS2 injector plugs onto the "old" LS1 injectors.
Thanks! This is just the info I was looking for! How do the C6 guys do this? I can't imagine they change the fuel rails but, I could be wrong. I don't know ****!!!
Spin- the clearance prob in the C6 is that there is a hump on the back of the FAST where the MAP sensor goes. This hump interferes with the cowl/wiper tray on the C6. They could probably get by with doing a revised casting/mold on the upper part of the intake, and it would still be usable on the LS1 cars in addition to C6s. I don't know if there would be any clearance problems on the GTO, etc... since the cowl line isn't as low (as on the C6). The fuel rail issue *might* be able to be resolved with spacers, though I want to say that it wouldn't work on the C6 for some reason...