Quote:
Originally Posted by clarkey1984
You can shorten the actuator arm between the turbo and the wastegate which will give you more boost, however I absolutely wouldn't do this until you have a boost gauge fitted so you can see where things are
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This is actually a pretty stupid way of trying to get more boost. The standard ECU software will always try to compensate and pull back any over boost it detects, so unless you're remapped, the ECU will fight what your turbo control value is trying to do and you'll just end up in a big mess in the long wrong.
The P1 ECU works differently and the method mentioned above will give you more boost, again though, it's not a safe way to do things.
Mappers for T4's are few and far between these days, might be someone left on T5D5 who can help but there's certainly nobody on these forums that can do it.
Your only other option, if you're in it for the long run is a stand alone ECU but fitting that and getting someone reputable to map it for you is going to cost you big time.