FuzzFace2 Posted May 12, 2019 Share Posted May 12, 2019 As I said, I haven't done the installation of that kit, but I have it and it does look complete. As for the in-tank pump, the tank has the large opening so can accommodate that pump. But, there were sending units that fit that tank and don't have a pump with them. I'm just about to launch into the transformation of Big Blue to EFI, and in doing so I'll be using that tank and will write up what I find. And, while I am planning on keeping the mid-ship tank as well, I'll be using the later fuel delivery modules in the tank, which have the sending unit, pump, and valves. So mine will be different than yours. I have only followed this 38 gal swap on & off as I don't think I will be doing this swap but do have a question or 2. I guess the tank has a big opening if there is talk of electric pumps being installed. Gary you said there are senders that work with this tank, 38 gal, and with our gauges? If so and you did not need a in tank pump why can't you leave the pump off and lower the pick up, if need be, to the bottom of the tank. I would think getting a sender that fits the tank and works with our gauges is the hard part. What are you guys doing with the spare tire? That is one of the big reason why I would not do this swap as I don't want to lose the bed space. Dave ---- Link to comment Share on other sites More sharing options...
kramttocs Posted May 12, 2019 Share Posted May 12, 2019 I have only followed this 38 gal swap on & off as I don't think I will be doing this swap but do have a question or 2. I guess the tank has a big opening if there is talk of electric pumps being installed. Gary you said there are senders that work with this tank, 38 gal, and with our gauges? If so and you did not need a in tank pump why can't you leave the pump off and lower the pick up, if need be, to the bottom of the tank. I would think getting a sender that fits the tank and works with our gauges is the hard part. What are you guys doing with the spare tire? That is one of the big reason why I would not do this swap as I don't want to lose the bed space. Dave ---- Same boat. If I had a better solution for the spare and I knew more about the pump/sender situation I might do it. Maybe someday. I believe there are 2 different tanks and the f26d has the wide opening for the pump. Why is it that the bronco 33gal tank and sending unit wont work as a straight swap? I feel like I read why at some point but can't recall now. Link to comment Share on other sites More sharing options...
grumpin Posted May 13, 2019 Share Posted May 13, 2019 Same boat. If I had a better solution for the spare and I knew more about the pump/sender situation I might do it. Maybe someday. I believe there are 2 different tanks and the f26d has the wide opening for the pump. Why is it that the bronco 33gal tank and sending unit wont work as a straight swap? I feel like I read why at some point but can't recall now. Another reason to go with the 38 gallon tank is that there are no sender units available for the rear steel tanks that have the four pins on my 1986 F250 with the 460. I had a shop change my rear pump, they called and said they were getting a new sending unit and pump because mine was rusted in. I said that there aren't any, and of course they said we'll find one. They didn't. Ended up with a new tank and pump and they got the old sender out. Link to comment Share on other sites More sharing options...
kramttocs Posted May 13, 2019 Share Posted May 13, 2019 Another reason to go with the 38 gallon tank is that there are no sender units available for the rear steel tanks that have the four pins on my 1986 F250 with the 460. I had a shop change my rear pump, they called and said they were getting a new sending unit and pump because mine was rusted in. I said that there aren't any, and of course they said we'll find one. They didn't. Ended up with a new tank and pump and they got the old sender out. Hey grump in, You can get the pump but not the sending unit? Knock on wood but haven't needed to research those yet. So when you got a new tank it was a 19 with reusing the sending unit or did you upgrade to the 38? Even with the 38 you'd still be in the same spot with not being able to get a 4 pin, right? Link to comment Share on other sites More sharing options...
grumpin Posted May 13, 2019 Share Posted May 13, 2019 Hey grump in, You can get the pump but not the sending unit? Knock on wood but haven't needed to research those yet. So when you got a new tank it was a 19 with reusing the sending unit or did you upgrade to the 38? Even with the 38 you'd still be in the same spot with not being able to get a 4 pin, right? Yes, new pump, old sending unit. New 19 gallon stock tank. And my mistake, I thought the 38 gallon tank came with a new sending unit, but it comes with an extension for the one you have or a new one. Link to comment Share on other sites More sharing options...
grumpin Posted May 13, 2019 Share Posted May 13, 2019 Yes, new pump, old sending unit. New 19 gallon stock tank. And my mistake, I thought the 38 gallon tank came with a new sending unit, but it comes with an extension for the one you have or a new one. And looking further at LMC, they show one for the 85-86 7.5. I don't remember why I didn't think it would work. For $70 I may order one to have. http://www.lmctruck.com/icatalog/fd/full.aspx?Page=42 Maybe someday I'll have to put an engine mounted pump on it, if it will work. I assume it has a cam in there. Link to comment Share on other sites More sharing options...
Gary Lewis Posted May 13, 2019 Share Posted May 13, 2019 Hey grump in, You can get the pump but not the sending unit? Knock on wood but haven't needed to research those yet. So when you got a new tank it was a 19 with reusing the sending unit or did you upgrade to the 38? Even with the 38 you'd still be in the same spot with not being able to get a 4 pin, right? Ford went through lots of attempts to make a good fuel system in the Bullnose era, and all of them were flawed. Fatally flawed. And at this point in time the new parts to fix them are drying up, and in many cases have dried up. One of the especially troublesome components of the fuel systems was the switching valve, and the latest version of that is no longer available. So, if you are going to run two tanks with the ~'85/86 system you have to find a way around that, and it isn't easy. Or, you could go back to the earlier system as long as you have a carb, but for the fuel-injected systems you are stuck. In my case I intend to go to the later "fuel delivery module" which has all of the switching done electrically and in the tank. In other words, outside the tank the supply has a Y and the return has a Y, and that's all. However, the sending units have a totally different resistance range than ours, so much so that our gauge would read backward and not go to either Full nor Empty. I intend to fix that issue with an Arduino computer - and then make that easily available to everyone. But, if you want to stay with Bullnose senders you can either graft one of them onto the fuel delivery module, which shouldn't be too hard, or go with one tank, say the 38 gallon one, and do away with the need for the switching valve. And to do that you can use the Bronco's 33 gallon pump/sending unit combo and lower the pickup as well as the float. Or, just use the Bronco's 33 gallon tank and pump/sending unit and give up only 5 gallons. As for the spare tire, the one on Big Blue is so big and heavy that it couldn't go under the rear anyway. So currently it rides in the middle of the bed. But, I've designed a very heavy duty spare tire carrier/bumper that, when built, will resolve the problem and put the tire just behind the tailgate. Here are a couple of "artists renderings" of that: Link to comment Share on other sites More sharing options...
grumpin Posted May 13, 2019 Share Posted May 13, 2019 Ford went through lots of attempts to make a good fuel system in the Bullnose era, and all of them were flawed. Fatally flawed. And at this point in time the new parts to fix them are drying up, and in many cases have dried up. One of the especially troublesome components of the fuel systems was the switching valve, and the latest version of that is no longer available. So, if you are going to run two tanks with the ~'85/86 system you have to find a way around that, and it isn't easy. Or, you could go back to the earlier system as long as you have a carb, but for the fuel-injected systems you are stuck. In my case I intend to go to the later "fuel delivery module" which has all of the switching done electrically and in the tank. In other words, outside the tank the supply has a Y and the return has a Y, and that's all. However, the sending units have a totally different resistance range than ours, so much so that our gauge would read backward and not go to either Full nor Empty. I intend to fix that issue with an Arduino computer - and then make that easily available to everyone. But, if you want to stay with Bullnose senders you can either graft one of them onto the fuel delivery module, which shouldn't be too hard, or go with one tank, say the 38 gallon one, and do away with the need for the switching valve. And to do that you can use the Bronco's 33 gallon pump/sending unit combo and lower the pickup as well as the float. Or, just use the Bronco's 33 gallon tank and pump/sending unit and give up only 5 gallons. As for the spare tire, the one on Big Blue is so big and heavy that it couldn't go under the rear anyway. So currently it rides in the middle of the bed. But, I've designed a very heavy duty spare tire carrier/bumper that, when built, will resolve the problem and put the tire just behind the tailgate. Here are a couple of "artists renderings" of that: Or, keep the electric pumps working and go by mileage for fuel level, which I have done for every pre 1992 Ford I have owned. And install one of these, https://www.amazon.com/Smittybilt-2798-Jerry-Gas-Holder/dp/B008CLNYPC And maybe add the 38 gallon tank and one of these in bed spare tire carriers, http://www.lmctruck.com/icatalog/fd/full.aspx?Page=27 Or, park it, and look out the window and say, dang that's a nice looking truck! Link to comment Share on other sites More sharing options...
kramttocs Posted May 13, 2019 Share Posted May 13, 2019 Or, park it, and look out the window and say, dang that's a nice looking truck! Haha with a 460, that's the smartest move one could make! Link to comment Share on other sites More sharing options...
Gary Lewis Posted May 13, 2019 Share Posted May 13, 2019 Or, park it, and look out the window and say, dang that's a nice looking truck! Haha with a 460, that's the smartest move one could make! Yes, the old addage that a 460 will pass anything but a gas station doesn't take into account the new technology. My 3.5L EB will run off and leave my 460, out tow it, and it returns 11.0 MPG towing our 25' boat while the BEST I've gotten with the 460 is 11.5 MPG running light and gently. Link to comment Share on other sites More sharing options...
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