cribbj wrote:
Mark, on other cars I've run a conventional return system, with the rail mounted regulator, set to 3.5 bar, but I PWM'd the pump down to 9 volts or so at idle & cruise, so that I was returning only minimal amounts of heated fuel to the tank.
That was my first plan....and still may be the way I go. It's also easy to make the PWM duty cycle be tied to load & rpm or just required fuel and pick numbers that get you just to the point the regulator is flowing. If I did that I could use a little fixed pressure regulator on the rail rather than the big adjustable regulator I have.
Its also easy to add a PID feature....but then it needs to be tuned which is maybe not so easy.
Then there is the very simple on/off apalrd described......lots of options.
I have all the parts to put a regulator on so that's probably where I'll start