Timing advance on big boost - what are you running

[kinger]

Just curious what people are running for timing. On my meth injected, compound boost at 25psi I am around 15 degrees. The EGTs are quite hot and nothing helps, fuel, boost, etc. I am thinking maybe I am trying to be too safe and run timing too low? Engine is 9.2CR

Fuel is tough I want to get to 91 oct with Torco plus Meth. Been running race fuel and want to get away from it.