A few of my friend are running EDCs on there trucks anf they dont use pressure switches they just use a momentary switch and a gauge. I had the same issues with my truck being too fast and the way i fixed it was with mufflers on the exhuast valves http://www.avsontheweb.com/product.php?productid=1169&cat=560&page=1 and to slow the system dowm when lifting the truck I put brass ballvalves before the valves
are you using 1/2 valve on your truck? are you happy with that MUFFLER/SLOW DOWN FILTER speed?
I thought of going with just a momentary switch from the start since I was forgetting the pump on then thought the pressure switch w/unloader would be better and it is compared to the way it was setup but I would prefer for the switch to kick on around 140psi i think that would work out much better
side note: some pics I took last night, this is the height I ride at you can see why tank pressure bothers me lol
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