Jim and netters This is why I have said that if you are not familiar you really need to get schooling on why things are done the way they are in fuel injection different from carbs.
The return line from the pressure regulator side MUST return to the fuel tank, below or at the pickup point (fuel level) to allow proper recirculation so that the fuel pump which is also cooled by the fuel it is pumping can be prevented from over heating and short life, and to prevent aeration of the fuel (bubbling). Typically the fuel pumps required to make a fuel injection system work properly must pump alot more volume and pressure and get MUCH hotter internally than carb pumps do, and is why so many manufacturers went to installing them inside the fuel tanks. The fuel acts to cool the pumps along with a constant recirculation and the pump is always primed being immersed in fuel (unless you are out). Your system is providing a circulation loop, but will tend to send fuel both ways in your lines, potentially starving the system under acceleration. Look at ALL systems on cars and light trucks; they all recirculate back to the tank. Ford trucks went through a huge problem with their multi tank system, where the checking valve that was supposed to keep the fuel coming from the correct tank would malfunction causing the fuel to be pumped back into the other tank, instead of to the engine. Positive selection, individual check valves, and proper line organization are just some of the considerations. Colin Sanford, FL Ordered almost all support parts from Clarks Corvairs for the KRvair engine this morning. Sights are set on a mid June fire up!
