I was wondering if I would gain any hp on adding a 58mm Throttle body. I still have the stock 48mm on my 383 and definitly need to upgrade. If I could do this without updating my PCM I could do this sooner than later. I was also wondering if I would see any more gains on say a BBK or an AS&M 58mm TB over the holley. I will be getting tuning software but I will also not know what I am doign with it at first.

 

No tuning needed with an M6

 

You will need to verify idle RPM, IAC motor counts and TPS closed throttle voltage when you do the install.

 

can these be checked with just a datalogger? And I guess if they are off I will need LT1_edit to fix them then huh... I plan on getting LT1 edit by the time I do this so I hope those arent that hard to change if infact they are different.

Thanks for the replies