Hi,

I have been searching through posts asking about 52 and 58mm throttle bodies but everyone just asks about putting them on stock 305s, etc. I want to know what kind of gains would come from putting a 52 on a 350 that has new heads, cam, custom tune, intake manifold, and various other little improvements.

Where am I being limited at now? I still have the stock runners, so would that be my first choke point instead of the tb?

Thanks.

-Jason

 

you won't see to much of a gain going from the stock 48 mm to the 52 maybe 4 or 5 horsepower. That was one thing on ours cars that was bigger than it needed to be. And for the 58 mm, you don't need that unless your going to push over 500 horse. I have a 52 mm on my car and it dynod at 470 horse at the crank. The limitations you should fix first would be the air box, the runners, exhaust, new intake manifold, either the stealth ram or mini ram.