Well, where SHOULD the stock boost level be?
If its supposed to be at .9 BAR (13.2 psi), then you might have some sort of a wastegate problem.
Do you have a manual/electronic boost control system on the car?
There's obviously something wrong with the turbo, but retarding timing won't just pull half your boost like that.
Graham
If its supposed to be at .9 BAR (13.2 psi), then you might have some sort of a wastegate problem.
Do you have a manual/electronic boost control system on the car?
There's obviously something wrong with the turbo, but retarding timing won't just pull half your boost like that.
Graham