Hi, Im new to Astra ownership and have a Mk 4 GSi Turbo (Byron's old one). Its my first turbo and at the moment I'm loving the sound of the chav val.., sorry, dump valve!
However, Byon told me it runs better witout it, and the boost does seem to be slightly erratic sometimes. Also, when cruising at medium throttle you can here boost escaping thru the dump valve.
Now, is that normal operation, or is it over powering the spring??
I dont particulally want to take it off, is there anything I can do to improve it, or are there anyother valves on the market which dont have this type of problem??
Its a Bailey valve by the way, like the one in regals adverts in the magazines etc.
Any info appreciated guys!!