I don't know. I would have expected the interconnected units to use
the timing from the primary unit, thus exactly the same. Maybe the display
only shows the timing info from the secondary unit, not using it unless the
primary unit is off or fails. It is a question I must ask.
I'm willing to bet at a 5 deg retard you are giving up power and fuel
economy. Unless you are detonation sensitive, I would expect no more than
a 2 deg retard on a 27 deg baseline for a 10 to 1 CR motor. I
would be happy with the 3 deg shift.
>>>>>>>>>>>
Yeah, I am tempted to leave the 3 degree retard alone until I have done
some testing. I am just slightly over with a 9:1 CR.
Scott Krueger