car: astra coupe turbo
have fitted a baileys d/v, and a stainless open air filter..
problem is the turbo spools up nicely, but if you floor it, it cuts out and feels like a normal 2.0!
also noticed a funny darth vadar breathing sound when releasing the throttle at around 1.5k revs, its coming out of the filter, but i thought the filter was only ingoing air, and not outgoing??
i havnt disabled the oe valve, but just blocked off the vaccuum hose..
any ideas?could it be the actuator needs adjusted?how is this done?and how much thread should be showing from the bottom?