Chris,
Thanks.
Makes a lot of sense. At about 7/1 compression, combustion would probably be on the very slow side.
With your set up, when you settled on 20 deg advance, were you still pulling 40 deg at cruse?
I recall one built EFI motor that ran 42 at cruse but pulled it back quickly with acceleration. He said this helped spool to.
Your solution might be better than modifying the mechanical advance to limit the mechanical advance part from 18 deg total to about 14 deg. With that approach we could run -20 at idle, 36 at cruse, and 25 on boost and would not need the MSC. Might be worth checking the advance rate also so we have full mechanical advance by say 2500rpm (subject to verification).
For years I have suspected there was a some pretty good potential for improvement on the ignition side. I could not manipulate this on my C2 Turbo without a whole new ignition ECU.
The best.
