58mm Throttle Bodies - NJFBOA - Home of New Jersey's Camaros and Firebirds

ar0ck · 09-09-2006, 06:05 PM

On my new set-up my intake already has a ported throttle body opening for 58mm. I figured that with my cam as well it would require a little more air-flow then the stock throttle body could handle. My question is, should I upgrade to a 58mm? Does anyone recommend a certain brand?

I already know my price range is around 300-500 for a decent one. The car will see nitrous and possibly forced induction.

GP99GT · 09-09-2006, 06:23 PM

i'd say yes, with a bigger cam and intake its logical that the motor will need more air. you dont NEED it, but it would probably open things up on the top end.

JSPERFORMANCE · 09-10-2006, 07:13 PM

the bigger throttle body will help espically if you are going to use forced induction

Pampered-Z · 09-11-2006, 07:38 AM

No, do not go with a 58MM TB unless you are 100% sure you need it ( stroker, forced induction, 6500+ RPMs). The 58 is too big and can actually hurt both low end performance and ET. A 52MM TB would be a better option on a NA, 350 or 355 CI motor.

My cam/head motor made 329 RWHP and ran 13.0, I switched to a 58MM and lost 2 tenths, put the 52 back on and was right back at 13.0!

Koll · 09-11-2006, 11:59 AM

52 is fine until you are around 450ish hp.