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DPWK-001 - Dual Pump Wiring Kit, MP150/280 F99 GSS
A dual in-tank harness must be selected for either standard Walbro-type (GSS) connectors (RXP255E/RXP340E) or ST340/W450/525 pumps (E85 DCSS pumps with Delphi Metri-Pack in-line connector). A pressure switch must be selected to activate the secondary pump under boost. The pressure should be selected so that the secondary pump activates approximately 100-150HP before the primary pump runs out of fuel. Selecting a pressure switch that is too low will cause pressure spikes (over fueling) and premature pump failure from constant cycling. Selecting a pressure that is too high will cause a lean condition and motor damage. Typical pressure is 7-10 PSI for most V8 applications and 15PSI for most V6 applications using gasoline and 255/340LPH pumps. The pump volume (255/340/450/525), type of fuel, motor efficiency, target A/F and pump voltage will influence this calculation. Please contact our sales team to discuss your requirements before making your purchase. We will require answers to the technical information above as well as your projected flywheel HP. (motor parts / build will not help us with the required HP number)
