running rich

[zrayr]

Originally Posted by MOTORHEAD

"..........Initial timing 17-18 deg, max 38 deg all in by 2800..........."

before changing any jetting, I would try 20 to 24 initial timing with the same total timing of 38. If you need less mechanical advance than the msd bushing offer (the18 degree bushing is at the bottom of their selection) then these folks have 10 and 14 degree:

Tuning MSD Distributors

nice write up at the bottom of the page...

If you have access to a start retard box, running that much initial timing is no problem. I use a msd digital 6+ box, it has a 20 degree start retard feature. It's amazing to see how fast the starter can spin the engine with the timing retarded 20 degrees.

I've had some success experimenting with timing first, before I start changing jets.

Z.