C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

LS1 intake on an LT1

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Old Jul 21, 2015 | 11:16 AM
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Default LS1 intake on an LT1

Browsing my local CL, I came across an ad for a C5 Corvette throttle body, intake manifold and air filter assembly for $350. I was wondering if I can put these parts on my '92 LT1 with stock heads or without stock heads? Or would this be a lot more involved than just changing out the intake systems?

If I'm not mistaken, one of the biggest issues with getting more power out of a LT1 is the intake restrictions on the stock intake and heads.

Is it possible? Would there be any benefit in performance? Would it actually be worth it? Or am I clueless here?

Last edited by 1stVetteFinally; Jul 21, 2015 at 11:23 AM.
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Old Jul 21, 2015 | 11:52 AM
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Short & Sweet. NO!
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Old Jul 21, 2015 | 11:59 AM
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It would not work. The bolt pattern would not match and also consider the LS1 is a dry intake meaning it only supports air and is not designed to share the intake valley with oil. Those are just the readily noticeable items making it incompatible. I never considered the LT1 manifold a restriction, at least looking back at TPI you're way ahead there. If anything, compared to the LS1, it may be very competitive with flow capability. If anything, it's your heads that would need some attention to max out the benefits of your existing manifold.

If that's a C5 throttle body, it's a drive-by-wire design, meaning it uses a resistance mearuring device in combination with a gas pedal designed to work wirelessly with it. Most like to keep a cable actuated throttle body like the F body LS cars came with. Again, that's if this was an entirely LSx platform but you can't interchange parts from gen 3 and up with gen 1 or 2 foundations. If you're willing to spend that much on LS1 parts, maybe look into hotcam kits for the LTx? You already have a great platform, sounds like a hotcam kit would give you the oomph you're looking for.
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Old Jul 21, 2015 | 12:08 PM
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there is absolutely much to be gained out of the stock LT1 platform. I only have a CAI, res delete, LS coil conversion, 24 lbs ford injectors & my tuning. Last pull 13.4 @ 105.81
I already beat a fairly mod'd LS. & 2013? Daytona R/T I just balanced the individual injector fuel trim 94 - 95 only. Picked up more power. Last datamaster dyno log has me at 321HP to the wheels.

Last edited by THE 383 admiral; Jul 21, 2015 at 01:32 PM.
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Old Jul 21, 2015 | 01:35 PM
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Originally Posted by 1985 Corvette
It would not work. The bolt pattern would not match and also consider the LS1 is a dry intake meaning it only supports air and is not designed to share the intake valley with oil. Those are just the readily noticeable items making it incompatible. I never considered the LT1 manifold a restriction, at least looking back at TPI you're way ahead there. If anything, compared to the LS1, it may be very competitive with flow capability. If anything, it's your heads that would need some attention to max out the benefits of your existing manifold.

If that's a C5 throttle body, it's a drive-by-wire design, meaning it uses a resistance mearuring device in combination with a gas pedal designed to work wirelessly with it. Most like to keep a cable actuated throttle body like the F body LS cars came with. Again, that's if this was an entirely LSx platform but you can't interchange parts from gen 3 and up with gen 1 or 2 foundations. If you're willing to spend that much on LS1 parts, maybe look into hotcam kits for the LTx? You already have a great platform, sounds like a hotcam kit would give you the oomph you're looking for.
Originally Posted by THE 383 admiral
there is absolutely much to be gained out of the stock LT1 platform. I only have A CAI, res delete, LS coil conversion, 24 lbs ford injectors & my tuning. Last pull 13.4 @ 105.81
I already beat a fairly mod'd LS. & 2013? Daytona R/T I just balanced the individual injector fuel trim 94 - 95 only. Picked up more power. Last datamaster dyno log has me at 321HP to the wheels.
Thank you for the answer with an explanation as to why it won't work. I am considering a hotcam, I just figured $350 listed (you know I'd have to haggle to price down some too) was a decent price if I could use the parts and see a benefit.
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Old Jul 21, 2015 | 02:09 PM
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Originally Posted by 1stVetteFinally
Thank you for the answer with an explanation as to why it won't work. I am considering a hotcam, I just figured $350 listed (you know I'd have to haggle to price down some too) was a decent price if I could use the parts and see a benefit.
Do your research. Seems there are two sides to every story. For instance:

http://www.ls1lt1.com/forum/lt1-%7C-...t-cam-kit.html

The kits offered don't seem too popular with the exception of Lloyd Elliott's offerings for tweaking. He seems to have a good rep on here as well.
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Old Jul 21, 2015 | 03:22 PM
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The closest you are going to get

http://www.hotrod.com/how-to/engine/...own-ls-engine/
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Old Jul 21, 2015 | 04:10 PM
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^Link no worky.



A bit late here b/c the guys above are right, but pics tell the story really well...

LT1 cylinder head, intake side:



LS1 cylinder head, intake side:
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Old Jul 21, 2015 | 06:40 PM
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link works fine for me.

but here's a pic from the webpage. basically a sbc block with a ls1 head



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Old Jul 21, 2015 | 08:30 PM
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Coming soon..... metal 3D printers.
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Old Jul 22, 2015 | 08:50 AM
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Originally Posted by Tom400CFI
^Link no worky.



A bit late here b/c the guys above are right, but pics tell the story really well...

LT1 cylinder head, intake side:



LS1 cylinder head, intake side:
pics tell the story very well. thank you
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Old Jul 22, 2015 | 09:14 AM
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Originally Posted by mrr23
basically a sbc block with a ls1 head
Ya if you want to spend ~3000 on a bare block just for LS heads, and intake. Then need an aftermarket EFI system or 24x kit unless you also want a carburetor and distributor.
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Old Jul 22, 2015 | 10:14 AM
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Hey guys I found a 5.7 Hemi intake for $500 and I was wondering since they are the same size motor would it fit?
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Old Jul 22, 2015 | 10:22 AM
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Ovrebo1, I have a nice Hammer. Or a shop press. I can make it fit! Stubborn fit Liquid metal.
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Old Jul 22, 2015 | 10:24 AM
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Originally Posted by ovrebo1
Hey guys I found a 5.7 Hemi intake for $500 and I was wondering since they are the same size motor would it fit?
Be nice, BE NICE!!!
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Old Jul 22, 2015 | 12:19 PM
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Originally Posted by ovrebo1
Hey guys I found a 5.7 Hemi intake for $500 and I was wondering since they are the same size motor would it fit?
Try the intake from a 454 it will work better.
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Old Jul 22, 2015 | 12:28 PM
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Originally Posted by ovrebo1
Hey guys I found a 5.7 Hemi intake for $500 and I was wondering since they are the same size motor would it fit?
Just need some duct tape and a few beer cans.
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Old Jul 22, 2015 | 11:37 PM
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Originally Posted by ovrebo1
Hey guys I found a 5.7 Hemi intake for $500 and I was wondering since they are the same size motor would it fit?
Originally Posted by THE 383 admiral
Ovrebo1, I have a nice Hammer. Or a shop press. I can make it fit! Stubborn fit Liquid metal.
Originally Posted by antfarmer2
Just need some duct tape and a few beer cans.
yep, and there is that "Richard" mentality that runs so rampant on these forums. And to think, I was almost successful at asking a question without someone trying to make me feel like a dumbass ,i,, ,,i,
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Old Jul 23, 2015 | 07:51 AM
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Originally Posted by 1stVetteFinally
I was almost successful at asking a question without someone trying to make me feel like a dumbass
I'm sorry. I was not trying to to do that.

People don't always consider that everyone had to start learning somewhere.

Someone else could provide a better answer. My understanding is that you need to replace the cylinder heads, camshaft, and exhaust before you need to worry about the factory LT1 intake being a problem.
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Old Jul 23, 2015 | 09:29 AM
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Originally Posted by chevyowner
My understanding is that you need to replace the cylinder heads, camshaft, and exhaust before you need to worry about the factory LT1 intake being a problem.
I understand that. I just thought that was a decent price for those parts, and that if I could use them, I'd buy'em and let them sit on a self until I was at that point. It is a intake set up for a Chevrolet 5.7 L V8. I do have a Chevrolet 5.7 L V8. I didn't know if it would work or not, so I asked. In all honesty, does that really sound that far fetched?

Last edited by 1stVetteFinally; Jul 23, 2015 at 09:36 AM.
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