Doug, you're at about the same place as Rommel was a short time ago. Check the "Timing Questions" thread. You should find some useful info.
Very useful info in Rommel's thread there is no doubt. I do need to point out that there is a difference between Doug's and Rommel's though. Doug has a 10-1 and Rommel's is 9.5-1. This 'can be' a significant factor. Come on Doug, pony up the extra $46 sents a gallon and see if the spark knock goes away. If you use octane to end the spark knock then you may find that you have more power because of it. I say this because it's the way my engine is. And I have to address the good point made that all engines do not perform better just because you add octane. BUT, some do.
