wh says that the high press switch cuts off at about 35-40 mph. the fan is mounted underneath the bed at a 30 degree angle with the highest point nearest the cab and lowest point nearest the tail end. the fan is on the bottom blowing up .The thinks the cab is leaking causing the air to leave, but if that was the case the high pressure switch would not cut out. he states that its no room at the engine due to the grill configuration to put it up there. running around town the air works good he says. he says he mounted it like that to keep gravels or stuff from being throwed into it. any comments
