thanks for replying so quickly...
for performance issues, do we want the valve opeing quickly (so the screw is out, so would mean keep undoing it until you have idle problems and then putting it back a bit), or do we want the spring opening slowly (screw in), to keep hold of some of the stored up boost??, or does this slow the turbo down?
sorry if these are crap questions, but i dont want to be crippling my car with me fiddling with something wrong.
lee