3" Straighflow Piping on stock 3SGTE, is it optimium Options

[zeus83]

hi guys,

just wondering, im using a custom full 3" (downpipe is 2.5") exhaust piping? i've been told that turbo doesn't like back pressure. so made it this way...
my engine is stock, i got ~245wHP on dynojet...

some claim that the 3" piping is to large for the amount of BHP, and advised me to add a center bullet or start with 2.5" till the mid then continue with 3" in getting more torque.

need advice to decide

Thx

This post has been edited by zeus83: Aug 2, 2010 - 11:02 PM

[Smaay]

3" is just fine, get the Ebay downpipe and build an exhaust on after that.

[yellowchinaman]

If you're running less than 350hp on your 3sgte, and you bung on a 3" system, you'll be suffering from boost creep like a bitch.
Best thing to do is if you want 3". just do it but keep your flexi as stock size untill you're engine can produce a few more horses.

This post has been edited by yellowchinaman: Aug 5, 2010 - 1:46 AM