Your problem is 1 MILLION % the stock efi pipe.
Remove it and you will be able to hold boost and get much more top end power.
Still using stock efi pipe, althought the a/c is gonna get ditched wen I'm back in the UK and the air filter will be front mounted.
Ricky I do have an HKS actuator but what do you mean when the safc is tuned? It is!
is the safc tuned? so you fuelling is spot on?
just seems a bit low on power that is all.
It poses a huge restriction on the turbo inlet, and will cause the boost to drop off at the top end, giving poor results
Dave