[JLMounce]

Originally Posted by ta man

32 degrees total 20 initial. Im surprised by the higher total numbers others have. I thought most were in the 28 to 32 range for these heads?

I'm nearly a mile high. The lack of oxygen requires a couple more degrees of ignition advance. I also run on 91, which is probably more octane than the engine really needs at 10.3:1 compression.

At sea level, I would bet I make peak power with more like 32-33 degrees of total timing.