[NoDOHC]

Timing is stock (5 degrees ATDC L, 20 degrees ATDC T)
It runs about 50 kPA of vacuum with the timing retarded that much.

I can't go much lean of 13:1 without retarding the timing a lot (it actually uses less fuel to idle with 10 degrees BTDC timing though, because it is running 70-75 kPA of vacuum).

I couldn't really get the idle smooth without retarding the timing, it idles like a weedwacker with normal timing numbers.

Actually, I use the pit in my timing map to stabilize the idle. The timing increases gradually below 1000 rpm and above 1500 rpm, this means that the engine gains power as the revs drop below idle (when engaging the clutch), giving a little bit of stability (improves driveability).

I wish I could idle closed loop, but I still haven't gotten that to work smoothly (probably need more timing retard).