OK guys-here's the deal---by taking out as much fuel from the tank as possible, it will only take a few gallons to raise the octane level of whats then in the tank!!!!!!It won't be contaminated-------and as the fuels get more to the higher level octanes, you need to richen up the jetting---------the AFR will be different with race gas-------now he hasn't told us anything about his timing except he don't know???????

His higher crankcase pressure at higher RPM levels point to detonation--------ignition timing and jetting/octane is the cure--------

Should I list my qualifications for him??? or would that make me liable for damages???????