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I've found that with my 11:1 motor, I had to experiment some with plugs before I settled on Autolite AR3911 (I think, can't remember right now ) for street use. I will go to something different at the track when I start racing again.

I can see a couple of things with the plugs that may be an issue. Based on the coloration of the threads, it looks like they're a bit hot for that setup. The timing marks look pretty good, but you could probably pull a couple of degrees out of it to get the timing signature to the middle of the...

Low voltage would definitely cause some issues.

If there was a hole in pistons, your compression would be a lot lower than it is. I agree that you're seeing some break in material and smoke coming out. If you have access to a bore scope/camera, you could take a peek inside the cylinders and see for yourself what it looks like. My best...

Refresh my memory: Is this a new build, or has it been running for a while? If it's a new build, you could be seeing some oil burning due to the rings not being seated yet. That's normal.

You should check the grounds to the regulator you have now. If it's not grounded well, you could see some really strange issues with voltage.

The Pertronix module is supposed to be the equivalent to any of the CDI boxes. It should be OK for what you're doing there.

You beat me to it. As I was reading his original post, I thought "ignition issue" immediately.