Does anyone have any experience with walbro255???
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Does anyone have any experience with walbro255???
Does anyone have a walbro255 they have used without a after market pressure regator and can tell me what the car acted like without the pressure regulator. thanks guys i have a 88 t2
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hell its prolly easier to just swap it anyways. the stock one is pushin 20-25 years old man. time to retire it. and come one its only like another 20-40 bucks for a new one. thts not too bad
#5
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Tons of people have used them. You can search through the section to read all about it.
Yes, it will drive fuel pressure up. In the brief time I tried one, I measured 46 psi at idle (stock is ~30 psi) and 48 psi with simulated atmospheric pressure (stock is ~40 psi). Under boost it was closer to normal at ~4 psi over stock specs. Idle will never be quite as smooth as with a OEM-style pump; even when you compensate with the variable resistor. My engine idled a full AFR point richer until I adjusted the resistor. In other words, it works, but it has side effects.
Yes, it will drive fuel pressure up. In the brief time I tried one, I measured 46 psi at idle (stock is ~30 psi) and 48 psi with simulated atmospheric pressure (stock is ~40 psi). Under boost it was closer to normal at ~4 psi over stock specs. Idle will never be quite as smooth as with a OEM-style pump; even when you compensate with the variable resistor. My engine idled a full AFR point richer until I adjusted the resistor. In other words, it works, but it has side effects.
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Cause that is the only other thing i can think of it being cause the injectors have been rebuilt and it bucks real hard at about the time the secondaries open up but its weird some times it will be like that there and then it will do it at other rpms
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#12
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It depends on your power goals. FD and 13B Cosmo fuel pumps flow enough for somewhere around 300 whp, but also won't overrun the stock FPR. Other Denso pumps like what are found in the 20B Cosmo or Supra will flow even more, but still play nice (ish) with the FPR.
#15
Other than an ebay special where do you find an FPR for 20 to 40 bucks. Any decent brand I found is easily over $100. But if you know of one please share.
#18
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if you have that much power you NEED a FPR
http://www.racingbeat.com/FRmazda2.htm
not a cheap ebay special for 40$ but i prefer name brand on my baby.
http://www.racingbeat.com/FRmazda2.htm
not a cheap ebay special for 40$ but i prefer name brand on my baby.
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if you have that much power you NEED a FPR
http://www.racingbeat.com/FRmazda2.htm
not a cheap ebay special for 40$ but i prefer name brand on my baby.
http://www.racingbeat.com/FRmazda2.htm
not a cheap ebay special for 40$ but i prefer name brand on my baby.
Well I have never heard of someone upgrading the fpr on their s5 for only 300 hp. I have heard a million times that one of the first steps to creating power is the fuel pump and the injectors because the OEM pump and injectors are esentially maxed out. Now people would probably upgrade the FPR to get rid of the sideeffects but the s5 fuel rail is a sealed unit, u can't remove the FPR or the PD... So u would have to get custom rails.. If I'm wrong someone please inform me but from what I understand the stock FPR on a s5 would work fine for 300 horse power
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