Been a little quiet Here
.... I have been busy and shop time is at a premium but I do have a good hardware and software solution figured for the E-pressure controller now I think - Just waiting for a few parts from digikey to show up to make a "production version".
Here is a video of a little test... the serial readout on the computer is the RPM reading from the ignition box and a reference number from my control loop - this test has a linear progression but curve progressions are included as an expo function.
Edit: I did tune the needle valve a bit into the test to get the pressure to +50 - that's why there is a variance a few seconds in...