Fuel Cells and 914's, Lessons Learned Options

[Racing914six]

The 914-6 3.2 Motronic had a fuel pickup problem with the old fuel cell. It had a round lid filler therefore, only a homemade sump would fit in the hole. Even with the tank full, the outside pump could not keep up with the fuel demand.

So a new system was needed. After some research, an oval opening fuel cell was needed as well as a real sump and an in-tank pump. The trick was cost. $800 for the cell, $400 for the pump and $150 for the sump. There had to be cheaper options.

Well a trip to the local race shop resulted in used sump for $50. On Ebay, a scratch and dent tank was procured for $425. Some have used a WALBRO GSS307 pump that delivers liters per hour and on Ebay they are ~$65

Here is a picture of the sump with the up pump installed: One trick is to have uses a couple of nut as spacers to offset the pump's bracket as to allow for the electrical connection.

[Racing914six]

The AN 6 SS hose was clamped onto the pumps barbed fitting. The next trick was to fit the sump with the pump into the oval opening. Took some wiggling, but it finally slipped into place. Then the foam was installed and special care was used to insure that the sump could not move in the tank and that no foam was near the barn doors. As seen below: Note the sumps existing fitting was not used. Another trick was to place some foam around the vent so the fuel could not slosh through to outside.