Join Date: Feb 2008
Location: Caistor Centre, ON, Canada
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I run a Viair 480C with my Pacbrake. The compressor runs on board air for several other things in addition to the brake. The brake does not need much air to operate so even the smaller Viair units will work just fine along with a 1/2 gallon tank.
As for wiring, the compressor should run on a relay so key on power only energizes the coil on the relay. You will need to add a pressure switch in line on the positive or negative side of the coil on the relay so the switch cuts power on and off as needed. I would also recommend adding a safety blow off valve on the tank so if there is an electrical failure that causes the compressor not to shut off, you won't have an over pressure situation. And you will also need to add a pneumatic solenoid to actuate the brake.
03 3500 QC DRW 4x4 6spd-6.7 Swap w/DPS S475/ported HE351 Twins, Smarty MM3/Calibrated Power tuning, F1 60 HP sticks, Pacbrake PRXB w/5" Flo Pro exhaust