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| In tank fuel pump? https://www.slantsix.org/forum/viewtopic.php?t=22301 |
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| Author: | Sam Powell [ Sun Mar 18, 2007 7:27 am ] |
| Post subject: | In tank fuel pump? |
Any ideas out there for a retro fuel tank for these A body cars that would allow an in tank, submerged pump. Alot of the stuff under the hood of my car could be eliminated if I could put the fuel pump in the tank like all modern cars. Does anybody make such a thing? Sam |
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| Author: | Dart270 [ Sun Mar 18, 2007 8:13 am ] |
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Sam, I believe there's an outfit in FL that custom makes old Mopar tanks with in-tank pumps. Can't recall the name, but should show up on a google search... Lou |
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| Author: | sandy in BC [ Sun Mar 18, 2007 10:42 am ] |
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It should be little trouble to mount a GM piece in the Chryco tank. I looked at it once .....seemed very doable without fabrication. |
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| Author: | mpgmike [ Sun Mar 18, 2007 11:26 am ] |
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When I fuel injected my brother's '88 Wrangler, I just cut the pick-up tube and strapped the pump in place there. It involved a little bending, but worked quite well. I just drilled out for the EFI wires and mounted them right in the stock pick-up. No, I don't have pics, and this job was out the door 2+ years ago. Mike |
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| Author: | SlantSixDan [ Sun Mar 18, 2007 11:38 am ] |
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H'mmm. I'm curious: What hardware do you figure on eliminating from under the hood(?!) by installation of an in-tank pump that could not likewise be eliminated by installation of an electric pump just outside the fuel tank? |
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| Author: | AnotherSix [ Sun Mar 18, 2007 12:13 pm ] |
| Post subject: | |
It looks pretty straight forward. There is a Walbro pump that I used in my GN that is fairly common and would work well for your setup. You can get one from Dennis Kirban for a good price, it includes the connector pigtail, mount bushings and new filter sock. It will accept a 5/16' hose to mate up to your stock line. I would try to scrounge up a GM hanger and cut off the lower bracket and as much of it as will work for your car and splice it onto your sender/pickup. You could get the insulator and power feed stud from the gm unit too. One issue might be the open design of your fuel tank. Fuel injected cars with in tank pumps have baffles that help keep the pump submerged. Without them it might be a problem when the tank is below about 1/3 full. |
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| Author: | AnotherSix [ Sun Mar 18, 2007 12:14 pm ] |
| Post subject: | |
It looks pretty straight forward. There is a Walbro pump that I used in my GN that is fairly common and would work well for your setup. You can get one from Dennis Kirban for a good price, it includes the connector pigtail, mount bushings and new filter sock. It will accept a 5/16' hose to mate up to your stock line. I would try to scrounge up a GM hanger and cut off the lower bracket and as much of it as will work for your car and splice it onto your sender/pickup. You could get the insulator and power feed stud from the gm unit too. One issue might be the open design of your fuel tank. Fuel injected cars with in tank pumps have baffles that help keep the pump submerged. Without them it might be a problem when the tank is below about 1/3 full. |
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| Author: | Sam Powell [ Sun Mar 18, 2007 7:40 pm ] |
| Post subject: | |
I have a surge tank and the high pressure electric fuel pump on the passenger's side inner fender. I would prefer to run the intake tube from the inter cooler to the TB up that side. Instead it must go back through the radiator core on the driver's side, and then cross the engine to enter the TB from the PAss side. This is all to keep the intake tube away from the heat of the turbo. If I did not have that concern, I could shorten the cold intake tube considerably. I am working this out now. I have 2.5" tubes, and silicone connectors on hand to lay it out, but am waiting for a back order on a 180 2.5" tube. This is made more complex by the fact that the TPS and the IAS both restrict the location of the intake tube. They both sit right in the way of certain pathways, which limits where the intake tube can go. To get back to Dan's question, if I had an in-tank pump, the space the surge tank takes up would be freed. It sits just to the passenger's side of the radiator as it is configured now. I was hoping someone had gotten the bright idea to make a retro kit specifically for the A bodies with a specific pump that just bolted in. The problem with the pump on the frame is a very annoying fuel pump whine that gets amplified by the frame structure, and a sudden dry pickup under certain cornering and accelration conditions. This is hard on the engine, and the fuel pump. I did not like it, and thus went to the surge tank. I could put the surge tank between the inner fender and the outer fender, which would take it out of the way also. Anothersix, does your Walbro kit go in the tank, or just outside of it? Is it noisy? If it is in the tank, then the noise is not an issue too much. I could hear the in-tank pump in my old Lebaron convertible somewhat,but it was not too loud. Your concern about baffling is real. I still have some imaging to do here, and am getting my head back into the options open to me after a long cold winter of non-car activity. Time away from the car has opened my mind to some things, but has also made the plans that seemed clear in October to be a little fuzzy right now. Sam |
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| Author: | cmexlr8 [ Mon Mar 19, 2007 9:19 am ] |
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Quote: I have a surge tank and the high pressure electric fuel pump on the passenger's side inner fender. ....
The electric pump is up front inside the engine compartment? What kind of pump is it? Most, if not all electric pumps need to be gravity fed, close to the tank and in a configuration that allows it to push fuel instead of pull fuel.
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| Author: | AnotherSix [ Mon Mar 19, 2007 7:30 pm ] |
| Post subject: | |
It is an in tank replacement for the stock pump that came on those cars. Good for horsepower in the high three hundred range, but not too much flow or pressure to deal with for street cars. Some of the big pumps can overpower the regulator. It is louder than the stock pump but not bad at all. I could hear it outside behind the car but not in the car. All the external pumps I have used made quite a bit of noise. |
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| Author: | Sam Powell [ Mon Mar 19, 2007 7:44 pm ] |
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The surge tank is high in the fender well, and is fed by the stock mechanical pump. The electric in-line pump is gravity fed from the surge tank, which then pushes the fuel through the fuel rail and to the pressure regulator. The Mega Manual has this diagramed in the fuel section. Sam |
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| Author: | sick6 [ Fri Mar 23, 2007 4:11 am ] |
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I can understand why Sam wants to change his, he has a specific need, but after having to pull a tank to change one of these nightmares in an s-10 blazer there is no way I would purposely inflict that sort of suffering on myself again. *shudder* |
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| Author: | Sam Powell [ Fri Mar 23, 2007 10:12 am ] |
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That's a good point. But everything is a compromise of one sort or another. I wouldn;t jump into that without considering the trade offs. I was just wondering if there was anything on the market these days that would make the job easier. I was pleasantly surprised when guys started making after market suspension and brake parts for these cars, and was just wondering if anything was happening along those lines with the fuel systems. Sam |
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| Author: | Walter Lee Jackson [ Sun Mar 25, 2007 3:31 pm ] |
| Post subject: | In tank fuel pump? |
Here's a source for the tanks: http://www.rickshotrodshop.com/tanks.htm --Walt Jackson |
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| Author: | Dart270 [ Sun Mar 25, 2007 5:19 pm ] |
| Post subject: | |
I think this is what I was thinking of, which is not in tank, but a baffled and lowered sump... http://www.4secondsflat.com/fuel_tank_index.html Lou |
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