well, not enough anyway.
Since swapping the RSR for a Greddy Power-Extreme-II, I can't get above 14psi.
My car is a UK spec auto, with no cats, a 3" downpipe and a ball-and-spring type manual boost controller.
I was easily hitting 18 and sometimes nearly 19psi with the RSR.
I have adjusted the boost controller just now, and it's made no difference. All the way up to 140mph it won't go above 14psi.
So, is this as much as my turbos can make of the exhaust energy at their disposal? i.e. is this not a wastegate issue, therefore boost controllers will be of no use?
Is a less restrictive exhaust the only way for more power?
Or is my boost controller hooked up wrong? There is still a little bit more to go on the screw-in of the boost controller, so I could try for more...
I'd appreciate your thoughts guys