Thanks Gary,

 

> I now have the Lightspeed set at 22 (can't retard it any more than that) and the mag at 20 and so far, so good.

 

Looks like Lightspeed is a mapped system (advance based deterministically on MP, rpm...)?  GAMI's (as yet unreleased) PRISM appears to be very feedback intensive by measuring peak cyl pressures (psi and relation to TDC).   A nice halfway point on the complexity spectrum is probably what LASAR did by measuring CHT and limiting advance when CHTs exceeded a pre-set limit.

 

Does Lightspeed have different mappings for different compression ratios?   One cool thing they do is to optionally display the spark advance.  Wonder if there would be a way for the pilot to set max-allowable advance?

 

.