5% increased gas mileage

[NoDOHC]

Good call Ted, I forgot that I am running negative split at idle. I was able to run more vacuum without misfiring by running 5 degrees negative split at idle. I also run negative split over 6,500 rpm. You need to have relatively advanced ignition timing before you try it (at least 5 deg BTDC, negative split causes a lot of surge with -5 BTDC timing (the factory setting of 12-15 degrees of positive split is much better when retarded that far).

I have not tried negative split while cruising. I will give that a shot once spring comes.

I am not sure that your e6k will support negative split. I think not, actually.