Reply to "What's Your Experience/Advice for Ignition Timing with High Swirl Heads?"

panteradougMember

I have A3 heads as well. I never thought to measure the diameter of the pockets though. Sorry.

I don't see with my set up any of this tendency some of the dyno tests show that the engine is happier with a total advance of 32-33°. Mine still like 36° total and 14-15° initial.

The determining factor for me is going to be how much the pump fuel can take. So far pump Premium is still ok and I am not feeling engine knock anywhere. Not yet anyway BUT when I put this engine together with stock stroke I didn't trust flat top pistons and used CJ dished pistons with the quench chamber heads.

If I check my notes I believe that I remember the calculated static cr at 9.8 or so?

5/12/228:41 AM

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