I'm currently driving a 86 Subaru GL 1.8L thats carbureted and I'm pulling my hair out with the crappy MPG. From what I gather I need 0.9 L/min of hho. I don't have time to build from scratch so I've been searching on Ebay for a kit. Dose anybody have any recommendations? Also, most of the kits on Ebay produce 2-3 L/min of hho could I put a potentiometer on the circuit to control amperage and thusly L/min?