Hi Bill,
Yes, the engine has forged pistons.
Total timing is at 38, under boost the msd box is pulling a a degree per pound up to a bar and 1.5 degree past a bar, based on the reading from the MAP sensor.
Essentially, under 16.5 psi we should end up pulling about 18.5 degrees for timing of 19.5.
Now we also have a out of boost map that gives us a smooth ramp to 4.5K rpms to total timing of 38, we're pulling a lot before 1.5K. No problems out of boost though of course :-)
At this boost we were only at 4,000 rpms and the AF/r was 12.7 - getting too lean. I need to figure out how to keep the boost down, at full rpms we would probably see 18psi+
Until I can get to the dyno again I'll probably set the total timing to 36 to dial everything back 2 degrees, that would give me 17.5 degrees at 16.5psi. Meanwhile I'm getting a little miss between 3.5-4K rpms that wasn't there yesterday, I may have fouled a plug already - we used a NGK 8 heat range because I didn't have any 6 or 7s available.
We'll see... Tons to play around with now :-D
