Two Walbro 255 Lph Pumps

[ttchevelle]

Just got back from the dyno for my first pull. Fuel pressure fell to 33 psi @
4848rpm twin turbo set up made 447 rwhp with 15 psi boost. AFR went to
12.2. Realized that only one of my fuel pumps are working. I found the fuse blown
and the second pump is shorted. Is this comon for a walbro 255 pump?

[camcojb]

In my experience the Walbro's are good pumps, no issues.

Jody

[GregWeld]

Hope you're running them on relays....

Ran a walbro for 6 or 7 years with zero issues. Putting a Walbro 255 in tank in the '32 Ford I'm doing EFI as we speak.

[CarlC]

What's your fuel pressure at full boost?

[ttchevelle]

33 psi. I found out that one of my pumps had failed after the fact. With only one pump we made 447 rwhp with the potential of alot more with two.

[64duece]

We've had good luck with them aswell. Have you considered adding a fuel pressure saftey switch/transducer? We run multi-pump applications very often and always try to have something for safety just in case.....

[ttchevelle]

Has anyone ever installed a wide band o2 and if so what type of gauge so I can constantly monitor my afr's? If my afr dropped it would be safe to assume I had a loss in fuel pressure.

[J2SpeedandCustom]

Originally Posted by ttchevelle

Has anyone ever installed a wide band o2 and if so what type of gauge so I can constantly monitor my afr's? If my afr dropped it would be safe to assume I had a loss in fuel pressure.

I like the innovative setups - http://www.innovatemotorsports.com/

Just make sure to get the O2 sensor placement correct in the downpipe so the reading with be accurate.

[64duece]

I like the NGK A/FX WBO2. Uses the better NGK vs Bosch sensor and stands up to heat and leaded fuels better. Should be installed atleast 12-14" after the turbo in the downpipe. Never install ahead of the turbo.

[ttchevelle]

Thanks I think i'm gonna go with the innovate looks fairly simple.