Walbro 255 vs. 255HP

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Mar 31, 2008 | 06:12 PM

mdacton

Thread Starter

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Joined: Oct 2006

Posts: 4,970

From: Goochland, Va.

Walbro 255 vs. 255HP

Whats the difference in performance and How much power would one be good for? vs the other one

Apr 12, 2008 | 10:06 PM

OBE1 95Z28

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Joined: Dec 1969

Posts: 4,950

From: San Diego, CA

The standard 255lph pump will delivery the same volume of fuel up until about 60psi. After that point, the standard 255 pump starts to die off whereas the HP keeps going.

Apr 14, 2008 | 12:05 PM

Injuneer

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Joined: Nov 1998

Posts: 71,094

From: Hell was full so they sent me to NJ

I thought I answered the same question for you at least 2 weeks ago in a PM

Quote:

Originally Posted by Injuneer

Quote:

Originally Posted by mdacton

Is a walbro 255 big enough pump?

I get no drops in pressure and its possible my pump is a HP so it does not flow good til 80 psi.

I'm not sure, maybe add another one?

According to the WALBRO pump data, the high pressure pump flows 1 GPM more than the standard pump, all the way up to 50psi. When you go over 50psi, the high pressure pump will flow significantly more than the standard. At no point will the high pressure pump flow less than the standard pump - it always flows more. So that is not your problem.

http://www.autoperformanceengineerin...l/fpspecs.html