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

Why Not the LT1?

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Old Mar 16, 2012 | 09:41 PM
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Dr_Shakalu's Avatar
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Default Why Not the LT1?

Hey everyone. I read something awhile back about the LT4's. It said that a lot of LT4's actually had more horsepower than was advertised. What makes the LT4's have different horsepower? Also, is there variables in horsepower with the LT1's and why not. Thanks, Ed.
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Old Mar 16, 2012 | 10:12 PM
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Originally Posted by Dr_Shakalu
Hey everyone. I read something awhile back about the LT4's. It said that a lot of LT4's actually had more horsepower than was advertised. What makes the LT4's have different horsepower? Also, is there variables in horsepower with the LT1's and why not. Thanks, Ed.
You can find many of your answers here.
http://www.grandsportregistry.com/lt1vslt4.htm

And further links to dyno and such here...
http://www.grandsportregistry.com/96_specs.htm

The LT1 does not seem to have the differences like the LT4 does in HP.
All LT1's (in Corvettes) are rated at 300HP 92-93 was Speed Density/Batch Fire Injection 94-96 was MAF/Sequential Fuel Injection. 92's only make 330 torque and the rest 340 due to a different camshaft design on the exhuast side.

Most LT1's will make about 260RWHP. If in good condition. Some will be more/some less. There is some variation on any mass produced engine.

Last edited by 93Rubie; Mar 16, 2012 at 10:15 PM.
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Old Mar 16, 2012 | 10:17 PM
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LT4 had higher flow heads, intake, hotter camshaft, and Crane roller rocker arms.
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Old Mar 16, 2012 | 11:38 PM
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lot of LT4's actually had more horsepower than was advertised
Wishful thinking and happy dynos
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Old Mar 17, 2012 | 05:26 AM
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Originally Posted by cuisinartvette
Wishful thinking and happy dynos

and the fact that all LT4s are manual transmission so will chassis dyno higher than an A4 ......
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