20gmr

iTrader: (7)

Copy and pasted**


Walbro 255lph GSS342 Fuel Pump (1 Pump)

The Walbro high output in-tank electric fuel GSS342 pumps have flow ratings of 255 liters of fuel per hour. These particular pumps flow significantly more fuel at higher pressure. For example, at 80 PSI the standard 255 lph pump will flow around 132 liters (35 gallons) per hour. At that same 80 PSI the equivalent HP (high pressure) fuel pump will flow over 210 liters (50 gallons) per hour.

Walbro in-tank electric fuel pumps utilize a proven gerotor design. The outside dimensions, however, are compact enough to fit existing hanger assemblies, without modification.

06MREvo

iTrader: (90)

Nice...ill have to read this when I get home & I'm not driving on 95...haha

freshevo8

iTrader: (16)

Great post! Thanks for the info. Much appreciated.....

itzwolf

iTrader: (9)

I did this on my Buschur Racing Double Pumper a few years ago. No problems what so ever!

I run 30psi on a 37r on pump gas with all the supporting mods...

SloRice

iTrader: (8)

I'll be checking my pumps and doing this if necesary in the next week or so.

Built BR motor, HTA3586, BR double pumper, ID2000 injectors and E85.....40+PSI FTW!!

Ted B

iTrader: (6)

There is no reason to do this to a double pump setup unless the fuel is E85 and large power levels are expected.

FYI

SloRice

iTrader: (8)

Correct. I made 550whp on 93 octane and ~630whp on Q16 on BR's dyno with a standard BR double pumper and 1200cc injectors. My IDC's were in the upper 80's/low 90's I believe.

I'm going to E85 and don't feel like running out of fuel during the tuning, so I'm going to do the pressure relief mod.

Go_Lancer_Go

iTrader: (13)

Cool! I'm gonna try this when I install my BBK

20gmr

iTrader: (7)

Since its a pressure releif valve wouldn't it really matter mostly on what fuel pressure you run? The pumps would flow the same up to 75 psi of fuel pressure, after that is when is a difference would be noticed. I understand there would need to be a large demand for fuel but i can't see how it would hurt to do.

Ted B

iTrader: (6)

With gasoline, the twin pumps have enough volumetric capacity at that point such that it shouldn't be an issue. With E85, the it's a different situation.

The one thing that never gets mentioned is why those relief valves are there in the first place, ostensibly to prevent a rupture of the pump case when it's operated inside the fuel tank. Obviously, that wouldn't be good! I run E85 with relief valves disabled, but that thought never completely escapes my mind ...

Walt

iTrader: (6)

Good info, i always wondered what a modded walboro was..

Thank's walt

BlueEvo61106

That is definitely good info! Thanks for sharing!

Wheatley

iTrader: (20)

Worked for my car. Had two intank walbros on a 6262 going lean above 6k at 32 psi on e85. Went from low 13 afrs to low 10s just with doing the mod.