LT1 Engine

[camcojb]

I have just bought a 1946 Chevy truck with a 1995 or 96 LT1 engine that came from a Camaro with aluminum heads! My question is it is stock and I would like to give it a little more pep. I notice Summit has two different size throttle bodies, a 52mm and a 58mm. What is the difference other than size? Why would you want the smaller size?

They also have a air fuel ratio sensor from Granatelli. What does it do and will it improve performance over the stock unit.

I know the engine has a reverse flow fan driven off of the cam. Would there be any benefit to go with an electric Meizere Fan? I have called them and they say they have one for the LT1.

Any other ideas would be appreciated!

Dan Masheck
Wharton, TX

58mm is the normal size to step up to when modding, but would make very little difference on a stock or mild combo. With a cam swap, ported heads, and headers then yes, otherwise spend your money in another direction.

That engine uses an electric fan. Meziere has an electric WATER PUMP, which would not add much power again for the money.

The wideband a/f kits are useful for tuning, the narrow band type are not accurate enough for wot tuning. Best bang for the buck to wake the engine up would be headers and exhaust, tuning, cam, and then ported heads. Start with the exhaust and tuning , then cam, then head and cam if the budget fits.

Jody