advancing your timing what does it do?
 

When you advance your timing what acctually happens? what does it do?

Your spark plugs fire earlier in the power stroke, actually slightly before the compression stroke is fully completed. This allows the air/fuel mixture to begin burning at the very top of the stroke, providing more time for the heat expansion to act on the top of the piston, which is where you get your power from.

Higher octane fuels burn slower, and thus need more advanced timing to make the most power than lower octane fuels. Advancing the timing too far can also slow the piston speed, costing you power. Just FYI.

use the search feature...ive personally explained it.