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
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88 325is "track whore"
99 540ia
74 2002
86 944 turbo -
My M42 car has the transfer pipe. Dunno if the M20 car does, since I haven't looked specifically for it.
Edit: looked under the M20 car and didn't see one. Hmm? I'm curious now.Last edited by strad; 11-01-2007, 09:32 PM.The current fleet:
1992 325ic: 148k-171k miles
1999 Chevrolet Tahoe LT 4WD, 114k-142k miles
1984 MasterCraft Stars and Stripes Powerslot (not a car :D) PCM Ford 351W, 904 hours -
I haven't ever looked into this, but it probably is a siphon system as is used on other BMW's built since E30 days.The car makes it possible, but the driver makes it happen.
Jim Levie, Huntsville, ALComment
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Its done by magic!
The flow of fuel from the return pipe forces the fuel into the pipe and transfers it to the other side of the tank.
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From the duplicate thread you posted:
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.Comment
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