Hello again, need a little help.
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Hello again, need a little help.
Hey folks,
Been away for a bit, as I was without a ford for a year or so. Back now, and working on an 86 F250 460/C6/NP208/3.55's.
I tried the search feature, without much luck. Is there a writeup on here for simplifying the Dual tank system? I want to eliminate the "Hot fuel" mess, and run one large fuel tank w/external pump.
All emissions are removed, except for egr, and charcoal cans.
Thanks for any help you can offer.
JD
Been away for a bit, as I was without a ford for a year or so. Back now, and working on an 86 F250 460/C6/NP208/3.55's.
I tried the search feature, without much luck. Is there a writeup on here for simplifying the Dual tank system? I want to eliminate the "Hot fuel" mess, and run one large fuel tank w/external pump.
All emissions are removed, except for egr, and charcoal cans.
Thanks for any help you can offer.
JD
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From: Virginia
There is no write-up that I know of for taking out the original fuel system and putting in something else. One reason is everyone does it differently when they do take it out. Some people keep both tanks, you want only one tank.
If you use one large fuel tank, that is mounted in the rear position and eliminates the spot for your spare tire.
If you use one large fuel tank, that is mounted in the rear position and eliminates the spot for your spare tire.
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No problem about the spare, mine ride up top.
I guess my main question is in removing the "hot fuel" return.
would I be ok Just running a Holley low pressure pump on the frame rail, direct to the carb, Or do I actually need a regulator that will return excess "hot" fuel to the carb?
I know ford has done a bunch of silly stuff over the years, but this dual tank hot fuel setup is ridiculous.
I guess my main question is in removing the "hot fuel" return.
would I be ok Just running a Holley low pressure pump on the frame rail, direct to the carb, Or do I actually need a regulator that will return excess "hot" fuel to the carb?
I know ford has done a bunch of silly stuff over the years, but this dual tank hot fuel setup is ridiculous.
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From: Denver Metro Area, CO
The Hot Fuel Handling System is to prevent vapor lock by keeping fuel always flowing, not giving it a chance to heat up and vaporize. If you have dual tanks, you'll have a supply and return for each tank. The fuel pumps were also de-energized in the event of loss of oil pressure in the engine to keep from feeding gasoline on a fire in the event of an accident.
This system was at first retrofitted onto existing vehicles in the field that the owners returned to the dealers because of vapor lock problems before it became part of the production build process.
You can experiment around and try to come up with something else if you want, letus know what you come up with.
This system was at first retrofitted onto existing vehicles in the field that the owners returned to the dealers because of vapor lock problems before it became part of the production build process.
You can experiment around and try to come up with something else if you want, letus know what you come up with.
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If you do use a conventional pump like the holley, I would eliminate the return system. It has a relief in the pump itself to regulate the pressure. I am not sure how it would all work out with some of the fuel going back to the tank. You would have to be careful and not starve the carb by letting too much fuel go back to the tank. The original system and orifice was designed with the factory pumps. Not sure if a pump like the Holley would work with this type of system.
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Seems like an awful lot of trouble to go through just to prevent vapor lock due to hot fuel. And they still ran the steel fuel line right along the engine block! I think rerouting an insulated rubber fuel line away from the hot parts would nix any chance of vapor lock. How often does that happen anyway? I've gotten several carburetted trucks real hot, over the years. Not one issue of vapor lock in my life.
Lucky for me, my front tank is working fine. So I think I'll replace the rear, and run a whole new system. That way, I can test it before removing the working parts of the old system.
Lucky for me, my front tank is working fine. So I think I'll replace the rear, and run a whole new system. That way, I can test it before removing the working parts of the old system.
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From: Virginia
The factory designs for worst case scenarios. I am making this up, but I think a lot of the 460 trucks and vans were delivery vehicles/maintenance vehicles, sitting around idling in the hot summer. It has to be rough on it using it that way.
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