Hollis;
Here's a few suggestions: How about water injection,or unshroudin the valves,polishing chambers, get rid of all sharp edges, round off the edge of the exhaust valve,deck clearence around .040"
Water injection is about the easiest and I hear the new digital systems work real good. Or run Avgas 100LL. my son uses it in his 12.8/1 low 10sec. brand "C"
Good luck;
Kam
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