First off im kinda hesitant to ask this question, knowing the easiest and cheepest way is to just leave it alone, but anyways:

I have a stock ct20 turbo, and the wastegate is obvously still internal, dumping right next to the turbo housing back into the exaust flow. I was just wondering if there was any way to dump the wastegate flow out seperatly straight down? I know the shape of the wastegate and turbo exaust "port" would probaly be the reason I should just do a de-cat and leave it, but as long as its apart and I have to buy parts I was just wondering.

also, how do you know if you have a steel ct20b, or ceramic ct20b? not having mine apart yet I dont know the shape, but on the steel ct20b it looks like you may be able to seprate the flow with a flange that is shaped right. My turbo is from a 99 st205 if it makes a difference.

Steel:
Creamic:


generic photos of what downpipes are availble (not for the 7 stud ct20b though):


thanks in advance
-Bryan

http://mr2oc.com/showthread.php?p=2028061#post2028061

http://www.bicperformance.com/products.htm

people have done these before, but the word on the street is that they just cause a lot of boost creep.

hey thanks for the fast replies and links, I need to register for MR2OC so Ill check that out later.

boost creep was actually on the back of my mind as i was thinking about running a full 3" exahust, no cats, just a canister in the back. this is a track car, so noise isn't an issue. (of course up to the 103 dB limit or what ever it is now)

Not entirely sure how to tell a ceramic blade from a steel one, but i would imagine you could put a magnet to the blades and see if attatches that would be my guess.

>

The core (blades) are the same material, it's what the shaft rides on that would be steel or ceramic.

This post has been edited by CelicaB: Oct 25, 2007 - 9:36 AM