L99 intake same as LT1?
#1
L99 intake same as LT1?
As said above dose the L99 (4.3L) version of the LT1 use the same intake manifold? Has any one done the conversion with that manifold before?
How about the runner dimentions for the LT1? I only have access to L99's here and mostly I dont want to cripple my car with under sized runners. If somone has the height/width of the LT1 IM I'll compair the L99 before I buy.
Thanks.
How about the runner dimentions for the LT1? I only have access to L99's here and mostly I dont want to cripple my car with under sized runners. If somone has the height/width of the LT1 IM I'll compair the L99 before I buy.
Thanks.
#4
Supreme Member
iTrader: (20)
Re: L99 intake same as LT1?
I also wasnt sure about the intake differences, and i thought i have heard you couldnt use the L99, but i guess that is false? I'd have to look it up
but make sure they dont use the fuel crossover in the rear, you need to have it in the front for the conversion to work right
but make sure they dont use the fuel crossover in the rear, you need to have it in the front for the conversion to work right
#5
Supreme Member
Re: L99 intake same as LT1?
The Caprice version of the intake never bolted to aluminum LT1 F-body heads. Caprices used cast iron heads. Heads that are basically cast iron Vortec heads but with a different intake bolt pattern and reverse cooling.
The intake ports on those Caprice engines are a lot more like LT4 F-body heads and Vortec truck heads, with respect to the intake ports (taller. skinnier than earlier intake ports). I'd measure carefully before bolting them onto anything else to make sure the ports line up.
Can't say for sure if the "little brother" Caprice L99 engine has the same ports as it's bigger brother LT1 Caprice motor, but it's worth actually checking before you make the leap.
The intake ports on those Caprice engines are a lot more like LT4 F-body heads and Vortec truck heads, with respect to the intake ports (taller. skinnier than earlier intake ports). I'd measure carefully before bolting them onto anything else to make sure the ports line up.
Can't say for sure if the "little brother" Caprice L99 engine has the same ports as it's bigger brother LT1 Caprice motor, but it's worth actually checking before you make the leap.
#7
Re: L99 intake same as LT1?
https://www.thirdgen.org/forums/alte...305-heads.html
Anything John says about those intakes I would take pretty seriously.
Anything John says about those intakes I would take pretty seriously.
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