I purchased my RF GT40 11 months ago. The owner said it was ready to go. Now, 500 hours of hard graft later, it is indeed ready to go. The most difficult problem of the 53 I bothered to record was the overflowing of the fuel tanks when full or nearly full. RF were less than helpful on this serious topic telling me they had changed the set up to include a cross over pipe[ like the originals] to solve the sort of problem I had. After many hours on the hoist ang lots of money later I came to an alarming conclusion. When running on , say, the left tank the right lift pump will transfer incremental amounts of fuel to the system even without being on. The result can be an overflow of the left tank. The reason for this seems to have escaped RF as has a very simple and cheap solution. What is happening is this. The lift pump is rated at 4 to 7 psi and has a check valve built in. BUT it only has a 1 to 2 psi spring loaded ball bearing to give it some back pressure. When switched off, fuel free surfacing in that tank will slosh forward and back overpowering the ball bearing and adding to the returning fuel. The solution is to fit a shut off valve after the lift pump and wired to it. {Both pumps} In my case the SOV screwed straight into the delivery side of the lift pumps and the problem ended. Cost $60 each. I hope this was of some help. Alas, my wife has long since refused to believe the car is safe and has refused to believe me when I say it is now fixed.
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