[daniel911T]

Originally Posted by ed mayo

The vacuum retard on the 2.4/ 2.7 engines was to reduce H/C at idle. It did not cause loss of performance since it immediately went away once you opened the throttle. I would not bother with the retard unless you want to use it to bring the idle down. Start with no retard and aim for about 0 to 5 * at idle and see if that allows for a nice consistent 900 or so RPM idle speed.

Got it. So the stock distributor used vacuum for idle control only. I don't feel much desire to implement that. I can, and will, do the same thing electronically.

I think I'll rig the vacuum lines, then take some notes while driving and observing the MAP levels. There may be some performance or efficiency to be gained in fine tuning and providing some mid RPM vacuum advance.

I'm going to start with the reproduced stock curve. In the future, I really like the higher ultimate advance of the 2.2T curve, and I may try that one too.

Thanks for the thoughts and discussion.

I'll post about how experimenting goes.