Fuel Pump & Fuel Pressure – IMPORTANT!

RETURN SYSTEMS (1999-2003):  GENIII engines require about 58psi of fuel pressure. The inlet is 3/8” with a built in regulator.  Supply the 3/8” port with 58+ psi of fuel and use the smaller 5/16” to return unused fuel to the tank.  Note: the OEM fuel-rail mounted regulator is “vacuum referenced” and MUST remain as it is “tuned” for it.  It will register approximately 52 psi at idle, and 58 psi when vacuum increases.

I recommend a serviceable filter pre pump, and a 10 micron filter post pump.  Summit Racing has all these parts.

Pre Filter,                                                                $12.95 ------- RUS-645120

Fuel Pump, Walbro 255 inline                                              $135.97------ VPN-GSL392BX

10mm x 1.0 / -6 AN (fuel pump adapter fittings)              $9.97--------- FRA-491961-BL

Post Pump Filter                                                       $16.95 ------- SUM-G1512

Fuel Rail RETURN A/N Adapter 5/16                              $14.97 ------- RUS-644113

Fuel Rail INLET A/N Adapter 3/8                    $14.97 ------- RUS-644123

RETURNLESS SYSTEMS (2004+):  The newer GENIII engines do not have the regulator & return port on the fuel rail.  You can use a special filter / regulator that has a return port built in.  It can be mounted in the rear of the vehicle right after the fuel pump.  The excess fuel is quickly returned to the tank eliminating the need of a return line ran all the way to the engine compartment.  Remember, fuel flow is what keeps fuel pumps cool.  IMPORTANT: If you do not use this type of filter / regulator you MUST verify that you have 58 psi at the fuel rail.  BD Turnkey Engines are tuned with this filter / regulator.  Engine performance & reliability will be compromised if the correct fuel pressure is not maintained!

Pre Filter,                                                                $12.95 ------- RUS-645120

Fuel Pump, Walbro 255 inline                                              $135.97------ VPN-GSL392BX

10mm x 1.0 / -6 AN (fuel pump adapter fittings)              $9.97--------- FRA-491961-BL

Returnless System Filter / Regulator                                $39.95 ------- WIX-33737

Fuel Filter / Regulator INLET A/N Adapter 3/8                   $14.97 ------- RUS-644123

Fuel Filter / Regulator RETURN A/N Adapter 5/16            $14.97 ------- RUS-644113

Fuel Filter / Regulator OUTLET A/N Adapter 3/8                   $11.97 ------- RUS-640940

Fuel Rail INLET A/N Adapter 3/8                               $14.97 ------- RUS-644123