i don,t suppose you know what head vols he used for avgas mix do you?.
I ask because thats what i,ll be running now instead of full avgas.
This year i ran a ccr of 7.03 to 1 and it was borderline on destruction with avgas.Head vols are 10>5 to halfway up plug hole with full av, i guess with mixed they,ll need to be 11 or 11.2 ish.