[johnneilson]

Ron did just fine in my opinion, the most important decision was based off His utilization of the vehicle. Not that He may change it later on, it suits the purpose now.

Combustion efficiency has many factors, timing only plays a part and must be managed to minimize detonation. Fuel alone will not cure it (octane) and the combustion chamber shape is critical. Modern technology of such provides much higher engine speeds and more conservative timing settings.

John