I just bought an intake (for the red look) and its been ported to accept a 58mm throttle body. Its also bean port matched to stock LT1 heads. With my mods, is it worth upgrading my 52mm to a 58mm? I don't plan on adding a cam anytime soon (i have some oil pressure problem i need to deal with) The only future mods I have planned is upgrading to long tube headers.

 

Ive always heard its not worth the 5hp.

 

but u think it would gain me 5hp? =)

 

no. Save the $$

 

Based on dyno tests on my setup, I'd say that once you go over 500 flywheelHP, a 58mm is a good idea.

 

On a stock engine even a 52mm is of questionable worth.

 

I believe the most powerfull hands/cam motor with regular LT4 intake and hydraulic roller cam is Ed Wright with 500 rwhp and he uses a 52mm TB.