How much knocking is too much ? Should we attempt to tune the car to no knocks at all under any condition?
If you have different grades of fuel, should we tune based on the lowest grade or tune based on highest grade and let the ignition retard do its own work? Will the car "gain power" on high octane fuel if we tuned it based on low octane.
I have heard conflicting views on that. There are people who told me if the car is not knocking occasionally, you are not giving it a chance to develope maximum power.