jbc426
Well-Known Member
A few years back I installed a new stock tank, a 3/8's" sending unit w/ a 1/4' return. I was converting my '68 Barracuda convertible from a Slant 6 to an injected Magnum set-up. I decided to run a surge tank set-up to avoid issues when the tank became less than 2/3's full.
I had modified my sending unit by silver soldering in a larger 3/8's" return bung. I then installed that in the tank and used a Carter pusher pump to circulate fuel from the tank, up to my surge tank and back to the tank at "0" psi. It worked very well for many years, but I always was suspect of the lifespan of the diminutive Carter pump.
A few weeks back, my fuel gauge suddenly stopped working to.
Yesterday, the Carter stopped working and left me stranded for a few minutes until I smacked it with a stick. It started working again, and I was able to get home.
Not wanting a repeat. I decided to install an in-tank Deatsch Werks pump I had bought years ago to do this exact conversion. The Carter worked so well, I just kept running it, but I knew an in-tank pump would be longer lasting and flow more fuel.
I pulled out the sending unit, found a short where the fuel sending sire passed through the sealing flange of the sending unit and made some modifications. I figured someone may want to do this some day, so here are some pictures of the modified sending unit. I left the soldered connections bare because I didn't have any fuel proof shrink tubing. The wires bolt to some style of fuel pumps, so I figured its safe once installed.
I used real silver solder I found at a welding supply shop after finding the common hardware stuff ineffective. I sourced the bulkhead wiring connector and my surge tank from Radium Engineering. They make the best quality parts that I've found and are considered top shelf by the Tuner community.
I had modified my sending unit by silver soldering in a larger 3/8's" return bung. I then installed that in the tank and used a Carter pusher pump to circulate fuel from the tank, up to my surge tank and back to the tank at "0" psi. It worked very well for many years, but I always was suspect of the lifespan of the diminutive Carter pump.
A few weeks back, my fuel gauge suddenly stopped working to.
Yesterday, the Carter stopped working and left me stranded for a few minutes until I smacked it with a stick. It started working again, and I was able to get home.
Not wanting a repeat. I decided to install an in-tank Deatsch Werks pump I had bought years ago to do this exact conversion. The Carter worked so well, I just kept running it, but I knew an in-tank pump would be longer lasting and flow more fuel.
I pulled out the sending unit, found a short where the fuel sending sire passed through the sealing flange of the sending unit and made some modifications. I figured someone may want to do this some day, so here are some pictures of the modified sending unit. I left the soldered connections bare because I didn't have any fuel proof shrink tubing. The wires bolt to some style of fuel pumps, so I figured its safe once installed.
I used real silver solder I found at a welding supply shop after finding the common hardware stuff ineffective. I sourced the bulkhead wiring connector and my surge tank from Radium Engineering. They make the best quality parts that I've found and are considered top shelf by the Tuner community.
