Wow !!! the gas must be really good where you are ! I am currently running 9 1/2 to 1 compression and I constantly check the specific gravity of the fuel I buy it usually checks 728-734 where it should be for 92 Octane Super . Lately its been checking at 710 no good ! According to my engine builder I am risking detonation and it has happened on several motors he has seen even with not much timing.