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Author Topic: Walbro Pump Question Gear Head JARED Member # 779 posted                              Whats the differnce between the walbro 255 high pressure compared to the walbro 255??? Which one would someone use with 24lbs injectors? This is copied directly from jds performance's website or heres the link. http://jdsperformance.com/index.asp?initemuid=436&fcmd=item&inmake=all Walbro Ford High Performance Fuel Pump/Kit While, most places send the same pump and a universal installation kit for every application, you can be assured to receive exactly what you ordered from us. We stock every pump and installation kit made by Walbro. You will receive the pump and installation kit specifically designed for the your vehicle. This assures easy installation. Make Year Description Mustang 1985-1997 155 LPH Mustang 1985-1997 190 LPH *pump#GSS242 Mustang 1985-1997 255 LPH *pump#GSS307 Mustang 1985-1997 255 LPH High Pressure *pump#GSS340 Mustang Cobra 1996-2003 255 LPH *pump#GSS317 Mustang Cobra 1996-2003 255 LPH High Pressure *pump#GSS342 Mustang 1998-2003 255 LPH *pump#GSS317 Mustang 1998-2003 255 LPH High Pressure *pump#GSS342 Probe GT 1988-1992 190 LPH *pump#GSS278 Probe GT 1988-1992 255 LPH *pump#GSS315 Probe GT 1988-1992 255 LPH High Pressure *pump#GSS341 Probe GT 1993-1997 190 LPH *pump#GSS250 Probe GT 1993-1997 255 LPH *pump#GSS317 Probe GT 1993-1997 255 LPH High Pressure *pump#GSS342 -------------------- Support our troops! Posts: 5685 | From: EASTBAY | Registered: Jan 2002  |  : 93PONY Mr. Valve Events Member # 60 posted                           The high pressure version flows substantially more fuel at higher pressures. Both flow 255lph at 40psi, but at 80psi, the high pressure version flows nearly double what the standard does. You can't really over-fuel a 5.0 with an in-tank pump. The high pressure 255 is good for ~450RWHP. [ January 22, 2003, 11:47 AM: Message edited by: 93PONY ] -------------------- www.advancedenginedevelopment.com SCT dealer Dynotuning (916)715-7569 Posts: 4265 | From: Fair Oaks, CA | Registered: Nov 2000  |  : Stimson _ Member # 51 posted                              Not too much, but every few lph counts. It could be the difference between going lean or burning a hole in your piston: http://www.roadraceengineering.com/fuelpumpflowrates.htm Posts: 2373 | Registered: Jun 2000  |  : Gear Head JARED Member # 779 posted                              Thank you guys. -------------------- Support our troops! Posts: 5685 | From: EASTBAY | Registered: Jan 2002  |  :

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