try blowing some smoke through the intake ducting just to be sure you got no air leaks before the head. maybe a manifold or throttle body gasket is been pushed out with the charge pressure?
Maybe it is time to look at an aftermarket managment set up, it sounds like that even mapped it is struggling to cope.
Quote from: gazareth on 27 June 2013, 00:20try blowing some smoke through the intake ducting just to be sure you got no air leaks before the head. maybe a manifold or throttle body gasket is been pushed out with the charge pressure?surely he got a boost gauge and can see a drop in psi?[not sure what he has to be honest. just know its a supercharged agg and throwing some ideas out there. anything is worth a try at this stage./quote]