yo!
at the minute i have got the devils own pressure switch fitted to my a/i and last time i drove it i was not too happy with it, everytime i went over a bump off boost i could hear the pump kick in, basically it seems too flimsy
this one http://www.alcohol-injection.com/water-injection-parts-3/adjustable-pressure-switch-1.html
anyone have any idea as to whether i can use any pressure switch from another system and also what ya think is the best
i have found this which seems to be what i am after
http://www.alcoholinjectionsystems.com/p129/1-25-PSI-Adjustable-Boost-Pressure-Switch/product_info.html