Let me pile on the thanks, and accolades Roger, great info!
I fully retard my HES plate a while ago to try and reduce the pinging I get with low octane fuel in the summer months, it really made difference that I could tell in the pinging, but I do feel like I lost some low end 'snap' from the engine.
Tilt your head, not the taco. - Pati Jinich
Charter member: T.O. club.