Increasing Pump Volume Flow

NOTE: You can only increase volume if you have already increased pressure.

Remove the high pressure hose on the back of the pump. Then remove the bigger nut and what you have is your pressure release valve. Near the tip is a small cross orfice that needs to be drilled out a fraction larger, and that will increase your pressure. I have heard that AGR uses a hummer release valve to gain their pressure. The differents between the Hummer valve and the stock valve is the size of this opening. Only drill it slightly larger, if drilled to large, you'll run the risk of loss of pressure.