EFI Anyone?

[RallySnake]

I have just finished installing and testing the Holley Sniper EFI System. I intention was to keep the cost to a reasonable level. After removing and inspecting my 30 year old tank, I found that it was surprisingly clean with only a small area of rust where I had welded on the filler tube. So, I decided to use it.

The fuel tank was a lot of work. I bought a Tanks.inc PA-4 kit which is an in-tank assembly with a fuel pump. It costs $236 from Summit and requires a 4.128" hole to be cut in the top of the fuel tank. After cutting the hole, I was able to stick my hand inside with a die grinder and remove the rust scale from the weld. I had to uses a hammer and dolly to beat out one of the ribs in the top of the tank to get a flat surface an inch wide around the hole. The PA-4 kit comes with a small tray which is supposed to keep a small pool of fuel at the bottom of the vertically mounted pump. I did not like this idea and I MUST HAVE a backup pump in case the primary fails. (It's happened too many times!) I will take pictures of these parts soon. So I went to a local muffler shop and had them cut off an 6.5" piece of 4" tailpipe. They also cut a circle out of some 1/8" plate and welded it on one end. I cut down the vertical bracket from the tanks.inc to 3.5" so it just reached inside the surge tank 1/2" (while the surge tank sat on the bottom of the gas tank). I drilled holes in both so I could screw the two together. I mounted the fuel pump that came with the kit onto a strap of stainless steel and attached it to the two screws on one side. I bought a second Walbro GCA3366-2 ($106 at Summit) which is very similar to the one that came with the kit and mounted it the same way on the other side. It was difficult to get the two filter screens to fit into the tank so I ordered the smallest ones I could find. One fit well, the other bent 90 degrees in the middle.

I bought a venturi jet pump (mentioned in a earlier post) and used 5/16" brake lines to connect and position it outside the tank. I brazed a 3/8" brake line into a hole about an inch from the bottom of the tank for the jet pump to spray into.

After everything fit together, I used a KBS Coatings Auto Fuel Tank Sealer Kit from Jegs ($70) . It is a 3 part kit that cleans, then acid etches and then coats the inside of the tank with an unbelievably tough coating. I also used it to coat the surge tank and the vertical bracket's cut section. This had to dry for a week, but I got a bad cold and for it sat for 3 weeks before I could continue.

The install of the Holley Sniper kit was pretty easy. I used an open 1/2 inch spacer on top of the Edelbrock EPS manifold with a heat shield to keep heat away from the throttle body's internal CPU. After much thought, I installed the oxygen sensor into the #3 cylinder's header tube just before it comes out the side of the car. I figured, if it didn't work, I would move it. I bought 10' of beautiful stainless 3/8" tubing for Orme Brothers ($100) and used it from the throttle body to the underside of the car. I used regular brake line under the car to the tank. I used a "Y" fitting to connect the output from the 2 pumps together and to one of the lines. The other was the return line to the third fitting on the Tanks.inc top plate (I had to order the extra one from Tanks.inc ($21). I used a 555-15175 fuel filter from Jegs ($14.44) in an accessible place under the car to connect the pressure line together.

As an electronics technician, the wiring was easy. Please see Part 2.