larger throttle body
 

I have an intake that is ported to accept a 58 mm throttle body. Im not sure what stock is, maybe 48mm. Would I be better off going for the 58mm tb or like a 52mm tb. I have a cold air intake,headers with cat-back exhaust and a bigger cam so far.Also would I just have to buy a brand new throttlebody from edelbrock or something ordo i send mine insomewhereas a core or whatever. thanks for any input.

RE: larger throttle body
 

LT1? LS1? TPI?....It helps if you tell us what kind of engine you are asking about.

RE: larger throttle body
 

52-58MM sounds like an LT1 but yeah it does help if we know what engine.

RE: larger throttle body
 

OH sorry,its an lt1. guess i could have mentioned that first.

RE: larger throttle body
 

Well I would say 58 if the intake is ported to accept it.

RE: larger throttle body
 

You're not going to be able to use all the flow from a 58mm TB until you're making around 350+ RWHP, but if you plan on doing new heads in the future you may as well go for the 58mm right now, especially if the intake can already accept it.

RE: larger throttle body
 

if you put a 58mm on a stock inturnal LT1 it will bog it down a little, so its best to so a cam and some other work till you get the 58mm

plus the stock 48mm is good till 400hp

RE: larger throttle body
 

You guys need to read the orig post, he already has cam and headers.

RE: larger throttle body
 

thanks guys, helpful input

RE: larger throttle body
 

what would a 52mm tb do for a stock engine? i mean cuz most parts tell you the hp gains but tbs dont.