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, what have you done to your HKS SQV screw setting and have you got the idling/stalling problem fixed?! i'm currently experiencing similiar problem on my E4 and thought of getting HKS EIDS Type-K to overcome it... but if simply adjusting the screw helps, i rather save my $$$.