Forced Induction Supercharger/Turbocharger

LS1 vs LT1

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Old Nov 15, 2003 | 05:24 PM
  #1  
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LS1 vs LT1

If you were to supercharge either which would it be??
does one make more power over the other or does it not matter once you start boosting??
Old Nov 16, 2003 | 01:45 PM
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LS1 makes more power stock to stock with same psi, i know that for sure

This was with 6 psi by the way, and the difference in hp was not the same as it was before the boost
Old Nov 16, 2003 | 07:57 PM
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are you talking about stock vs stock? or modded out motors?
Old Nov 16, 2003 | 08:19 PM
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The ls1 responds to boost better. The heads flow so much better. Plus the engine doesn't blow up with such small amount of boost. To buy an ls1 car and then blower would cost much more than lt1+blower. So with the money you would be spending on the car and blower with the ls1 setup you could be buying a set of afr heads for the lt1. But if I was going to buy a f body now I would buy an ls1, especially if I was going to add some boost to it.
Old Nov 16, 2003 | 08:42 PM
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I think the superchargers offered for the LS1 are very small because of space constraints. This being the case, LT1's can make more power.

I've also seen numerous very slow supercharged LS1 cars around, so tuning must be more difficult with the OBD2 stuff.

Mike
Old Nov 16, 2003 | 10:21 PM
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are you talking about stock vs stock? or modded out motors?
either or...I was just curious about what people thought about which car was nicer to supercharge. I want to get another Camaro in a couple years and I think I want to make it into a toy car and boosting sounded like it would be a fun idea.

Last edited by gh0st; Nov 16, 2003 at 10:23 PM.
Old Nov 16, 2003 | 10:29 PM
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either way youll have to build a solid bottom end, and the ls1 is superior, but parts may be more expensive including the car. the lt1 may be cheaper to buy and buld up, if your not going for all out power, i mean 400-500rwhp can be made from either one failry easy with forced induction.
Old Nov 16, 2003 | 11:13 PM
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Its seems like it would be all the same once you start building and boosting the crap out of either, although from pricing ive seen you could make an lt1 much faster for a lot cheaper on boost if you're running enough boost to need a lower compression bottom end.
Old Nov 17, 2003 | 08:12 AM
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I would go with the LT1 for the simple fact is that I hear of so man y LS1's lifting heads with ease under light loads of boost. Also the LT1 block is stronger as well. On the ls1 forums you see alot of people switching to iron blocks.
Old Nov 17, 2003 | 10:28 AM
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People switch to iron 6 litre blocks because it's a cheap way to get some extra cubes. There have been a few instances of lifing the heads off the block, but these were all extreme applications with over 700 RWHP.

If you're going to supercharge either one you're obviously going to be working on it, and the LT1 is such a nightmare to work on in comparison to the LS1 that the only way I would consider getting one is if you got it for next to nothing. An LS1 will set you back at least 5K more than an LS1 and you can do quite a bit with 5K. Granted the car is older looking but it all depends on what your objectives are as to whether that will matter or not.

There's two 94 Z28s in the paper here for less than 4K, either one of these 100-120K mile cars would be a good starting point if you plan on building the whole thing.

If you're going to leave the bottom end stock go with the LS1, as they seem to hold up better with moderate boost loads. Either one has weak hyperutectic pistons but the LS1 has a slightly lower compression ratio. Also the cheap and available 6 litre aluminum truck heads are a direct swap onto any 5.7 and will drop the compression in the 9.4-9.6 range, which will make for a more reliable combination on pump gas.
Old Nov 17, 2003 | 12:35 PM
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Well I plan to make it a big project but I need to learn a lot before I can start. I want to rebuild the engine and go all forged. I'm just trying to decide on what platform I should start looking at and since I want to rebuilt the whole thing I wasnt sure whether or not it mattered. I dont want it to be a battle to work on as you suggested the LT1 would be. but what do you mean by building the whole thing...gutting the whole engine?? because I have a feeling I'll end up doing that in time

Are there any sites with info on this stuff?? or do any places sell engine rebuild kits or do I have to buy all this stuff individually?? sorry for all the n00b questions but I'm just trying to get an idea of where I should start.

do you have any pictures of that 67 camaro...that car must be the best of both worlds old school style with all the newer goodies
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