Quote: The volume going through the 1/2" pickup is not the "limiting factor"...it's the flow rate. The HV pump moves more oil through the system....think of it as a vaccum. The increased capacity of the pump creates a stronger pull on the pickup. That's why you're getting more pressure from the HV pump, the flow rate is higher...but, the stock pump isn't going to run at a higher psi than an HV pump unless you have something wrong with your system or the relief spring is partially open.
please don't be offended but this is wrong. the HV pump will only move more oil through the system if it's output pressure is higher and depending on other factors it may not have any higher pressure than the stock pump. unless the engine is so loose the stock pump cannot supply enough oil as long as the relief valves are set at the same pressure the flow through the engine will be the same.
again if the stock pumps relief is set a 80# (and the pump is achieving 80#) and the HV pump is set at 60# than the stock pump is pumping more oil through the system than the HV pump.
the increased capacity of the HV pump ONLY pulls harder on the suction if it's discharge pressure is above the stock pump, otherwise the oil is internally recirculating from the pumps discharge back into the suction through the relief cavity.
