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Auto Racing/Auxillary fuel tank and pump

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Expert: - 8/20/2005


Question
What is a good method to bring the electric fuel pump wires throught an 1/8" thick aluminum top of an auxillary fuel tank? The tank has return fuel coming back from the rail. It is about 5" in diameter and about 15" tall.  It has an 1/8" vent line to above the normal tank level.  I can't dump the return fuel back to the main tanks.

Answer
The problem is sealing them effrectively so they don't leak fuel - - - probably the use of a regular neoprene grommet (not rubber) and some sealant. For this I would not use plain silicone, but ask for Permatex Hylomar.  I believe it's gasoline resistant, but be sure to read the instructions and specs before comitting to it.

Then be extra-carful to apply it to perfectly clean and neat surfaces, both in side and out, above and below. Goop up everything and give it a day or two to cure before using or exposing it to fuel again. Also , leave plenty of slack in the wires.  

Good luck

Dan Liddy
Sarasota, Florida  

Auto Racing

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Dan Liddy

Expertise

Anything concerning race cars, 20 years competition experience, Senior Competition Driver Instructor , car builder, mechanic, welding, fabrication, tuning , engine modifications, set up, suspension design. Specializing in Datsun/Nissan products. Please submit questions about RACE CARS ONLY. No street cars, no video game scenarios Thank you.

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I have been racing for 20 years, I have been the Central Florida SCCA Regional Championship points for 5 years running, and won the championship in my class 2 times. During my first start in the 60's I won many solo awards and the State Championship Drags. I serve as a senior instructor for SCCA, and have taught in Mercedes AMG events at Daytona, and Dodge Viper Days at Sebring International. I have been in the thick of the competition for all of my career. At one time or another I have driven race cars at speeds nearing 195 MPH. It's quite a ride !

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