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most timing lies in the recoil spring and slide weight , they even have different springs for plus p rounds, you can do every upgrade
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The springs have nothing to do with timing. Timing is commonly confused with time. While different spring rates can affect time, they can't affect timing.
Timing is mechanically fixed, and the timed function will occur at its appointed place in the cycle, regardless of the speed of the cycle.
Time is a function of speed and distance.
If you disable the automatic spark advance in a distributor and set the ignition timing to fire the plug at 10 degrees BTDC, the plug will fire at 10' BTDC whether the engine is idling or at redline.