I did a search and all I could come up with is that a throttle body is only worth it once you "break into the engine". So my question is with my horsepower and H/C combo would it be worth it? How much hp do you think its worth? I know i can put a 52mm on without making the intake manifold opening bigger, so is it worth it to bore and go 54mm or 58mm? I have AS&M headers and love the quality so I really want to go with one of their pieces. I know I won't get much from it but I don't have much left to do to my car and am lookin' to squeeze a couple more ponies out of her NA before I do a power adder. Thanks alot.

 

I am kinda in the same boat. I dont have any head work done but I wouldnt mind having the throttle body for later on when I do my heads. I have looked on ebay and there are a few guys that sell stock throttle bodies that have been bored out and had new hardware put in them. They are only about $120 and for about $20 more you can get them powder coated red, black, or polished. In my opinion they are a pretty good deal. I think I saw them in 52, 56, 58mm sizes. On your car a bigger throttle body could be worth 10rwhp since you have h/c and a 355. Just giving you my input. AS&M does make pretty good products so its pretty much just your budget. Have a good day. Dustin.

 

Awesome thats kinda what I was thinkin'. Around 10rwhp, but I don't know whether to go with a 52, 54 or 58...Also does anybody know how big the new Edelbrock intake manifold opening is? Maybe I will just do both of those at the same time. Any suggestions?

 

Impressive numbers from the hotcam. With that power level you could go with a 58mm tb. The intake openings could be enlarged while it's still on, just need to stuff it with rugs and grease to catch the shavings.

 

FULLY ported intake and 58MM throttle body can be worth 20-25 RWHP on a built motor

 

Yeah i have heard of people porting it while its on the car, thanks for the info I was leanin' towards goin 58 anyways even if it was going to be over kill because you never know what you're gonna do in the future right. Thanks for the info guys.