v8bug

Setup: 5.3 stock, Master Power t70 .68ar, will be street driven, pump gas

Turbo compressor outlet is 2.5"

Can I run 2.5" pipe to a 2.5" inlet/outlet intercooler, than transition up to throttle body size after the intercooler?

Or should I run a larger intercooler inlet/outlet and larger pipe alltogether?

Any help would be great

Thanks,

Matt

67Firebird455

iTrader: (27)

Run what's on the intercooler, going bigger isn't going to make ANY difference unless you're going to bend (pinch) the hell out of the pipe on it's way. I had the same turbo, and sounds like the same style intercooler, 2.5 the entire way and then used a coupler to go to the MAF/TB.

fenix999

iTrader: (17)

Run 2.5" off the first section of the compressor housing and then immediaely run 3" since most decently sized intercoolers are 3" inlet/outlet. 3" will also help out with volume/flow bla bla. Good luck with everything.

fenix999

iTrader: (17)

oh wait, just saw your intercooler was 2.5", w/e you can still run 3" if you dont want to buy a new intercooler (budget $$) but you will obviously have to transition the pipes down on the inlet outlet from 3"-2.5" if you use the bigger pipes

theblur98ss

iTrader: (71)

If you already have the intercooler at 2.5" then I'd just run everything that size. If you don't have it yet I'd get a 3" and come off the turbo with a 2.5 to 3 increaser and run the cold side in 3" just in case you decide to go bigger in the future.