The fuel cell I'm using for a water/alcohol tank is in the rear hatch of the car. I'm hesitant to run a boost/vacuum line all the way back to the hatch because of the potential for a boost leak and I'm unsure how the fluid level sending unit would respond to pressurization. That, and I just had the AFPR sitting around and thought, "Hmm, let's try something..." :wink:

you can try this:
(similar to a fuel injection system. But you have a run a non-by-pass pump.

http://www.aquamist.co.uk/forum/return-m.jpg