internal wastegate problem

[Jimbo2000]

hi all, posted this in another thread but thought i would start a new thread

heres my problem, I'm not making any difference from 14 psi and over,workshop thinks its cause of the wastegate (T04), it had 2 "bedsprings" hanging off with one attached to the turbo and one not, due to the seller of the car taking it off so i wasnt learning how to drive it with it pushing out close to 1.5bar

we thought it was a restrictive cat but later found out that it was gutted anyway , so replaced that with a 3 inch one and still the problem remains.

have turbosmart e-boost as well.

any suggestions?

. . .

gone

[Jimbo2000]

?

[Jimbo2000]

Rev?

steve?

Sydneykid?

V-Spec?

cmon i know you guys know your stuff

[JimX]

I'm getting similar problems with my T04, and similar unknown causes. Part of the problem *was* the wastegate, but not all of it. I upgraded it to a stronger unit but I'm still having slight surge/hesitance problems in upper rev ranges. The next step for me is a bigger dump pipe and machining out the exhaust housing a bit, but I don't think that's all of it either.

I think most of the reason is just that this turbo doesn't like high boost.

[rb25]

oh - do you mean if you set the boost past 14psi on your controller, the turbo wont boost any harder? If so, wastegate problem like JimX said?

[Jimbo2000]

hey jimx is your skyline silver?

do you have a vl turbo?

[Jimbo2000]

thanks rb

[JimX]

Jimbo yep Have you seen it at Hills?

[Jimbo2000]

nah man

they said last time i was there that they were talking to me for like 5 minutes thinking i was you cause our cars are so similar and we've got the Exact same problem

[Jimbo2000]

small world

[Jimbo2000]

thought i might bump this up

[JimX]

I haven't done anything with mine yet I'm waiting for the PowerFC to arrive, and then I'll see if I can tune the flat spots out. If so then my wastegate must be ok. But I won't know for the next week or 2 at the very least.