[2manycars]

Just because you do not hear pinging is no promise that the timing is correct. Today's gas is much better than it was in 1930, and you may never hear pinging, but still be too far advanced. Too much advance puts a strain on the rod bearings, and you can pound them right out with too much advance. I know this from experience. Experiment with the control while at speed and under slight load, and when you feel the engine is not running any stronger by advancing, stop advancing, and note where the lever is for further reference. Too much advance is bad, even without pinging.