Reply to "Fuel Injection and Electronic Ignition for VW engines - Speeduino Style"

Update and lessons learned: I'm having to redo my EFI fuel return.

The original design used a brass 3/8" tee between the fuel tank and the pump to connect to the fuel pressure regulator fuel return. This works, BUT, the pump is cooled by the fuel running through it, and the same fuel recirculates until the pump gets hot. Obviously, this is not good for the pump and hot fuel isn't as good as cool fuel for horsepower.

The usual EFI design is to dump the fuel return back into the fuel tank, being careful not to create bubbles near the gas feed at the bottom of the tank.

I've got a 6an bulkhead fitting on order to return the fuel directly into the fuel tank. The larger amount of fuel being recirculated should lower the pump temperature.

https://www.amazon.com/Dewhel-...600202964&sr=8-3

@DannyP, have you thought through where you are going to locate the fuel return back into your tank yet?

9/15/201:53 PM

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