Late E30 Fuel transfer, how does it work??

[nah325i]

I am very interested in learning how fuel is transfered from the drivers side of the tank to the passenger side on a late E30. There is no transfer pump, there is no transfer pipe on the bottom like early cars. The return comes into the drivers side but actually runs over to the pass side where the pump is and there is no apparent pick up in the bottom of the drivers side of the tank. I have even cut a tank open to try and figure this out and I am stumped. Ideas? Thanks

[whowhatwhere]

If you looked at the line that passes from the driver to the passenger side, you would notice a venturi looking thing on the bottom of the drivers side.

On the underside of that venturi, (in the area where there is a vacuum) is a tiny hole. That venturi sucks fuel from the drivers side (think of a carburettor), to the passenger side fuel basket, which when it overflows, it starts the whole process over again.


Exept, remember. Most people on here think im a complete dumbass.

I figured it out by looking in the tank with a flashlight.


Its a completely ingenious idea.