turning pump up
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Junior User
Joined: Jul 2009
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turning pump up
I just got my 7.3 with the 5 speed put in and drove it I can't get any black smoke under any type off hard acceleration or lugging I made my owen air ram and now have 6" open exhaust so maybe I can turn him up a little bit?
Senior User
Joined: Mar 2008
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From: Jupiter
yes but i would still buy a pyro. with intake and exhaust i was able to turn my pump up a full flat and still have less smoke then when i had everything stock.
Cargo Master
Joined: Mar 2006
Posts: 2,789
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From: Sand GAp, KY
A flat refers to the sides of an allen wrench. The screw is an inset allen head under the little triangular cove on the passenger side of the ip. Turning it one flat means turning the screw 1/6th of a turn or one flat.
Cargo Master
Joined: Mar 2006
Posts: 2,789
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From: Sand GAp, KY
By the way what year truck is this? If it was a fuel injected 460 with both intank and also frame rail mounted pumps then the intank is a low pressure pump and the frame pump is high pressure. If it is fuel injected with just the intank pump then it is a high pressure pump. In either case you shouldn't run the high pressure system with out a bypass pressure regulator with a return. Doing so will overlaod the ip. If you don't use the bypass with return regulator it will burn out the pump. Having the electric pump makes purging air from the system easy.
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Junior User
Joined: Jul 2009
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turning up pump
it's an 89 that I put in an 86 body and your right the 460 in the 86 had high pressure electric fuel pumps and I took them out and just ,made my owen pickups being that the 89 diesel has a manual pump and I ran return lines same as it was before i pulled it, the gas already had returns. but I found out tonight that I can't get fuel to go in those tanks I put 5 gal in with a gas can the other day and it worked fine but now even a gas can wont work I'm very puzled cause it will trckle in very slowly but when you go to fill it it just backs up to the top of the neck what do I do about that and why would diesel make any dif the 1" fuel nausle fits down in there fine?both tanks the same way.
Thanks
Thanks
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
Any chance you have mashed the fill hoses when you sat the bed on the frame?
The fill pipes are so close to flat that filling the tanks can be a big complaint seen here in the forum rather often.
The fill pipes are so close to flat that filling the tanks can be a big complaint seen here in the forum rather often.
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Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
Did you reinstall the vent hoses inside the filler tube?
I left those out of mine, best thing I ever did.
When I installed the dump bed, the fill tubes are even flatter than stock, so filling it up was a real pain and took forever.
I left those out of mine, best thing I ever did.
When I installed the dump bed, the fill tubes are even flatter than stock, so filling it up was a real pain and took forever.
Freshman User
Joined: Sep 2002
Posts: 47
Likes: 0
From: New Zealand
you can try googling ford fuel filler mod . In my tanks the vent is on top of the tank and it has a roll over valve in it. This basically a ballvalve that stops the fuel draining out if your truck rolls over. Its a really small opening . I made a new one with a much bigger outlet. Made a huge difference. I have only done the rear tank so the front tank is still almost impossible to fill.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
Two different vents.
The one inside the fill tube was supposed to help air exit the tank when filling with fuel.
Since fuel nozzles deliver a rather good stream of fuel, it is about 5/8" in diameter.
Every one I have pulled out, winds up sticking down in the tank to far, so when you get close to full it start spitting fuel out at you.
Also the size of the vent tube reduces how much room is left in the fill tube, so small nozzles and slow flow rates are all the fill tube can handle.
On most of the IDI truck tanks, the fuel cap is not vented.
So the vent in the top of the tank with the roll over valve is to let air in as the fuel is used.
Since that is at a much slower rate, the size does not have to be very large.
If you do one of the mods out there where you remove the vent in the top of the tank and install a 1/2" or 3/4" hose fitting and then tie it back into the filler neck, it lets the air in the tank exit through the larger tube, tank fills as fast as you can pump fuel down the fill tube.
But, you still have to have a provision for air to get in the tank as fuel is used or you will build a vacuum in the tank and the engine will stall or you will suck air in at the weakest connection in the return lines/filter.
And that gets you right back to the air intrusion problem.
The one inside the fill tube was supposed to help air exit the tank when filling with fuel.
Since fuel nozzles deliver a rather good stream of fuel, it is about 5/8" in diameter.
Every one I have pulled out, winds up sticking down in the tank to far, so when you get close to full it start spitting fuel out at you.
Also the size of the vent tube reduces how much room is left in the fill tube, so small nozzles and slow flow rates are all the fill tube can handle.
On most of the IDI truck tanks, the fuel cap is not vented.
So the vent in the top of the tank with the roll over valve is to let air in as the fuel is used.
Since that is at a much slower rate, the size does not have to be very large.
If you do one of the mods out there where you remove the vent in the top of the tank and install a 1/2" or 3/4" hose fitting and then tie it back into the filler neck, it lets the air in the tank exit through the larger tube, tank fills as fast as you can pump fuel down the fill tube.
But, you still have to have a provision for air to get in the tank as fuel is used or you will build a vacuum in the tank and the engine will stall or you will suck air in at the weakest connection in the return lines/filter.
And that gets you right back to the air intrusion problem.
Freshman User
Joined: Sep 2002
Posts: 47
Likes: 0
From: New Zealand
yeah that makes sense, but i think my truck origonally being a gas truck has venting caps , so i was thinking the OP might have venting caps as well . If it is done properly it works really well. 
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