Hey wanna, I see all the time you push the Walbro pump. I haven't been able to find details about it. Can ya tell me the benefits and details? Is it electric?

 

I split your post off so as not to muddy the waters on BC847's thread.

The Walbro setup I'm running is based on a 2nd/3rd gen fuel system designed by SuperDuty. It uses a high pressure, high volume electric pump (made by Walbro) and a bypass regulator located AFTER the fuel filter. The important points in that last sentence are "high pressure, high volume" and "bypass regulator AFTER the filter." Pump manufacturer and even whether or not it's electric, mechanical, or voodoo magic powered are not important points.

Discussion of my current fuel system setup can be found here:
https://www.dieseltruckresource.com/...d.php?t=120066

The benefit is constant fuel pressure regardless of load. When fuel pressure is regulated before the filter (either by an external regulator or by the spring in a mechanical or electric pump), you only have your desired fuel pressure before the fuel filter. The restriction of the filter causes the pressure to drop under load. Using a bypass regulator after the filter and a high pressure, high volume pump changes this. The pump is pumping all the fuel it can flow at all times, if it flows 50 gph at the system pressure, there is 50 gph available to the injection pump. Flow in excess of what the injection pump is using is bypassed back to the tank to control the fuel pressure. When demand goes up, less fuel is bypassed but pressure remains steady.

The other benefit of my particular setup is redundancy. If something should happen to the electric pump, I still have a conventional 1st gen piston pump to keep me running. If something happens to the mechanical pump (as in BearKiller's blob of goop stuck in the inlet screen) I have the electric to get me home. That said, I'm not a big fan of electric fuel pumps. They are just not as reliable as mechanical pumps. I went with the Walbro at the time because it was a proven setup that I could piggyback onto my truck without compromising reliability, but if you read the thread I linked to you'll notice I suggested the fuel system BC847 (and BanzaiToyota) have implemented on their trucks. I actually like the mechanical system better, and I will probably convert my truck over to it soon and use a bigger better electric pump for other purposes.

 

Did you have a late night, there, last night ???

 

Most definitely. Good catch, thanks. I edited the original post to avoid confusing the issue further.

 

Thank you Dave! I have been wonderin bout that pump for a while. I guess I'll skip to BC's pump mod.

 

Yep, good plan.