Max HP Out Of A Walbro 255?
05-20-2007, 04:51 AM
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Research the effects of voltage at pump terminals [wire size vs current draw] and pressures above 43.4 psi and how in DECREASES total flow and pump life.
http://www.roadraceengineering.com/f...pflowrates.htm
For reliable long term operation be sure the pump or parallel pumps are only operating at 50% of peak capacity.
http://www.fuindustries.com/supra/MK...lculations.xls
http://www.roadraceengineering.com/f...pflowrates.htm
For reliable long term operation be sure the pump or parallel pumps are only operating at 50% of peak capacity.
http://www.fuindustries.com/supra/MK...lculations.xls
05-20-2007, 05:33 AM
#4
if you go with HUGE injectors, then you can run at a lower Fuel pressure which helps with the pump. Fuel pumps can eliver more fuel at lower pressures than at higher ones......the opposite is true of injectors.....injectors flow more at higher pressures..........
that's why I say use HUGE injectors (like 1000cc units) if you are going to try and maximize a singel walbro 255
that's why I say use HUGE injectors (like 1000cc units) if you are going to try and maximize a singel walbro 255
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05-20-2007, 08:54 AM
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I know. But its also not imperetive that I get one now ahead of some other mods I'd like to get under the hood. At my conservative boost settings I don't need that return yet.
05-20-2007, 10:26 AM
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Originally Posted by JETPILOT
How much power can I get out of the single in tank walbro 255? for 525whp will I need any fuel system modifications other than the return fuel system and the 255 pump?
JET
JET
Im not sure though, but I think there are two version of the Walbro, high pressure and high volume!
05-20-2007, 12:09 PM
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A normal oem fuel pump last at least thru 70k/6 year warranty [Infiniti] most 120k depending on the cleanliness of the fuel you buy.
Water in ethanolized fuel can decrease functional life significantly.
Increasing operating psi above 43.4 increases current draw and decreases operational life.
Not sure if members consider 1 year a satisfactory life vs 5 years?
Water in ethanolized fuel can decrease functional life significantly.
Increasing operating psi above 43.4 increases current draw and decreases operational life.
Not sure if members consider 1 year a satisfactory life vs 5 years?
05-20-2007, 01:12 PM
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Originally Posted by QuadCam
actually, I think this is the easiest car I have ever worked on....
05-20-2007, 02:22 PM
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Has anyone tried using a fuel pump booster to increase max hp? If this worked well, it would be an inexpensive solution to increase fueling. I don't know much about them so tuners chime in with your experience please.
