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Old 10-11-2007, 05:22 PM
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Overkillphil Overkillphil is offline
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Join Date: Jan 2007
Location: Langhorne Speedway
Posts: 2,445
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Joel, I used a street rod sump kit which has a self contained baffle. Nice kit, just have to cut a nice round hole in the top of the tank. I cut where the "breast" looking area is with the vent tube coming out. I used a correct size holesaw as recommended and took my time.

Then I painted the cut area with Eastwood tank silver to protect it (I bought a brand new tank for this project) and installed the sump kit with GN pump. I noticed the new kits are coming with the pump so you don't have to worry about that part either.

I retained the old sending unit assembly in its original location to run the gauge. I cut a hole in the old suction line just under the sending unit sealing disc to act as a vent. That is connected to my old vent line.

The sump kit has the feed line and return lines built in. Just make the connections. I had to cut a small section out of my trunk floor for clearance, no big deal. Actually makes it very easy to change pumps if you have to.

I ran all new supply and return lines as I didn't want to take any chances. I custom bent steel line and made a nice bracket plate for the fuel filter which I welded on the inside (behind) my subframe connector on the pass. side. I ran all the lines on the pass. side BTW. For the fuel filter I used a stock Buick GN filter just to keep everything simple. This is designed for this purpose, so why reinvent the wheel. I discovered a nice coil bracket works perfectly on the filter to bolt to the welded bracket.

The regulator is mounted on the pass. side wheel well and is an Aeromotive unit. Nice unit designed for this purpose. There are only a few regulators made for this type of usage. I got alot of resistence from vendors and suppliers about this. Alot of "you can't do that crap", just like in 1987 when I was figuring a way to install the 200-4R trans in my 72 Formula!

Anyway, I installed an electric fuel gauge since I hate gauges on the hood and am not impressed with the isolators. The electric Autometer gauge works flawlessly and is rock steady.

Like any other electric fuel pump install, make sure you use quality stuff and have good, tight and reliable connections. Also, probably most important: The return line MUST be at least the same size as the supply line.

My Formula has had fuel starvation issues for 10 years now in one form or another. I tried alot of things over the years to eliminate this. Even the holley electric race pump I used had major issues. I completed this project earlier this year and the car has been running flawlessly. These pumps can support alot more horsepower than people think. BTW, this is not the AC-Delco GN pump, but the better aftermarket replacement from Walbro (255 lt.hr).

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