Simple (stupid) plumbing question... - Ford Powerstroke Diesel Forum
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Old 09-15-2008, 07:11 PM Rookie

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Simple (stupid) plumbing question...

Hello everyone,

I'm new around here, and Powerstrokes are new to me as well. I am no stranger to WVO installs, but all of my experience has been with VW, Mercedes, and Isuzu inline, mechanical motors.

I am doing my first Powerstroke conversion on a 1995 F-250 and everything is going great, but I still have one BIG question....

Where (or rather, how) should I split the fuel system between Diesel and WVO?

Here is a picture to help....

My first inclination is to split the fuel system between the bottom of the fuel filter and the high pressure side of the lift pump, and use a 12V pump to supply WVO and the normal low pressure side of the stock pump for diesel. However, there can't be more than an inch between the bottom of the filter and the pump. Do any of you split it there? If so how?

I understand that the fuel pump is a two part pump that acts as a lift pump (4-6psi) and a high pressure supply pump to the fuel rails (40-70psi), however is that high pressure side of the pump able to handle hot WVO? In theory, it should, because by the time the WVO reaches the pump it will be the same viscosity as diesel. However, I thought I should ask because practice often often differs from theory, and you guys have the over the road experience.

If the stock pump will not work with WVO I have an alternative plan to supply the rails with WVO, however it will cost me an extra $300, plus the cost of making a new manifold out of push-loc fittings and high pressure hose.

What am I missing here? There has got to be another way than the vegistroke 94-97 upgrade....

Hope someone can help, and glad to be part of the forum....I have been taking a bunch of photos of the install and will post upon successful completion....Joe
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