Walbro / Racor install

[Matt Bachand]

Seems like your PSI w/ the Walbro is about as good as a 93 HO pump.

Which apparently is more than needed. 4+ anytime is well within spec.

The difference is, when pulling hard the 93 HO pump will drop in psi, where as the Walbro just keeps up with the flow with little PSI or volume drop-off.

Walbro is also made to survive a lot better with a non-rusting aluminum housing. Not the the little rusty can with fuel lines attached to it resembling more of a gasoline inline fuel filter with a harness connected to it than a lift pump.

This is also pulling through any pre-filter of your choice, which that alone isn't recommended with the 93 HO pumps.

All for a few bux more, with little fabrication required.

Still wish I had 10psi or so though. I like the thought of the IP opening and the fuel just getting jammed in there.

 

[Matt Bachand]

According to instructions, Matt is using 98-3528 spring.

My question is why does it not come with it to begin with or should we specify what spring we want?

I think due to the electromagnetic nature of it, they can't mass produce them identical, so they have to pressure test each unit with a variety of springs to make it meet specs, and someones getting lazy, or just educated guessing to increase production speed.

You can feel the magnets pull the screwdriver tip everywhere when I dipped it in to grab the valve and spring. I didn't need a magnet like the directions said, it just stuck to my screwdriver on its own.

JMJ Thanks for doing that. Did the blueprint of the racor not come out legible or did you not get it?

 

[JMJNet]

JMJ Thanks for doing that. Did the blueprint of the racor not come out legible or did you not get it?

The blueprint is there, just have to save the file and open it in your local computer. It is on page 2, may not be as clear since faxes are not as good to transmit details.

I understand the mass production issue. Work in some facilities like that where they have a few different springs to choose from and depends on how awake the operator is that day. So if someone gets one, the have to measure the pressure, if it is not within range like yours, we have to exchange the spring.

 

[JMJNet]

One more question, does it still have to be installed vertically? or horizontal as you had it, is fine?

 

[Matt Bachand]

One more question, does it still have to be installed vertically? or horizontal as you had it, is fine?

Still horizontal. Didn't get to do any testing with it vert or hor as my power supply didn't work as I hoped... Walbro said before it can be mounted either way, and the guy never asked me orientation, so I would gather it wouldn't make a difference, also seeing the inside, I dion't see how it could.

 

[Matt Bachand]

Driving to work today and the fuel pressure gauge all of a sudded read zero.

I assumed it was the gauge and then stuck hand under frame to feel walbro and no purring. (I got 2 shiny SS bolts on the frame, so its easy to reach hand under to feel)

Checked power at harness was there.

Got the the job, did the job (long 7 hours thinking about the rig)... good thing for flow when fail, or I would have been out the days pay... Drove home with no fuel pressure ..............................


Took walbro apart, and the SPRING BROKE IN HALF!!!!!!!! WTF!!!!!!!!!

I still had the other spring he gave me, the one that was more copper color, and I tossed that in there, and it was purring... hooked it all back up and now its acting all-together different.

It instantly goes to 5psi, and maintains that always. It also is always evenly pulsing at idle, before it would do more like an SSS code... p p p .... p p p .... p p p ... P's being pulses.

PSI use to fluctuate alot +/- 1-2psi, but when heavy demand was required it would level smooth out at a consistant 4.

Now its always at 5. When driving, I got on it hard and I got it to dip to 4 with instant 5 recovery...

Interesting.

 

[buddy]

Thanks for that info, maybe I'll use the copper colored one