Camaro 1973 Camaro Type LT
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Fuel Tank (August 29, 2009)

This page is the summary page for the fuel tank. I decided to modify my tank to use an in tank electric fuel pump. I pulled a fuel pump assembly from a 3rd generation TPI Camaro and modified it to fit my tank. I also made a sump for the fuel pump to sit in to keep the pump submerged in fuel when the tank is low. If the tank was deeper, I would have built a baffle within the tank.

Warning to anyone reading this. Be extremely careful when modifying a fuel tank. My tank did not have fresh gas in it for nearly 20 years. Gas sat in it for 13 years until I cleaned and emptied the tank. After that, the tank sat in an attic above my garage open to vent for another 6 years. If you were to do these modifications to your tank make sure to properly excavate the tank of any gas or fumes.

Status photos as of 8/29/2009:

Here is my first attempt at sumping the tank. I cut a hole in the front bottom of the tank. My original ideal was to use a baking loaf pan. After trying to weld the pan, I realized that the gauge of the steel was too thin and would not work.
After the loaf pan failure, I decided to make my own sump out of 18 gauge steel. I made the sump out of a single piece of steel and bent up the sides and just had to weld up the corners. After I welded up the box, I put water in the box to test whether it was watertight and would not leak.
I then cut up the donor pump assembly to remove the tubes I do not need and to set the pump to the proper depth. Originally, I modified and welded the 3rd gen sending unit to work with my setup. Unfortunately, the welding seemed to mess up the sending unit and it no longer functioned properly.
The next step was to weld in the sump. I added holes to the top of the sump to allow fuel to enter the sump.
I also removed the existing tank vents for emissions and welded up the holes shut. I will be running a vented gas cap to allow the tank to vent.
The next step was to strip the exterior of the tank. Prior to this I cleaned up the interior of the tank. I was able to wire wheel the interior of the tank using the hole for the sump before it was welded in. I then treated and sealed the interior using the POR-15 fuel tank products.
I then used Rustoleum Hammered Silver paint to coat the exterior of the tank.
After some research, I decided to use a VDO universal sending unit. This required me to cut another hole in the top of the tank. I then fed the ground and sender lines to the original fuel pump assembly.
When I took the pump assembly from the 3rd gen Camaro, I also took all the wiring with it. This included the plug that was mounted to the floor. I decided to mount the plug in the area where the emmisions vent was mounted behind the back seat. I had to mount it to a plate that covered the larger original hole.
Next I installed a return feed using a bulkhead connector and a piece of 1/2 inch aluminum line.
I then flared the 3/8 inch line with a 37 degree flare tool and installed an AN-6 tube nut coupler and sleeve fitting.
Here is everything installed in the tank.
I stripped and then coated the Fuel Tank straps with POR-15. I later coated the straps with gloss black paint.
Here is the tank installed.

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