Magnum EFI Return or Returnless? & Vacuum Regulator Question

Dubob said

The purpose of the vacuum reference is to keep the pressure at the injector tip at its optimum psi. Supposed to keep the spray pattern at what its designed for. Here’s an article if interested. If it were me I’d run a return for the simple fact it gives you the ability to expand its abilities down the road.


Fuel Pressure Regulators | VaporWorx - We Give You Gas

Click to expand...

I have been reading about this and I believe my donor vehicle used voltage to the pump to address any issues of regulation. Now that I'm not using the stock fuel pump I think I will have to use vacuum to the regulator. Maybe this will be a more crude approach to regulate vs. the ECM doing it on the donor car.