How To Tune Your Vintage Mustang for Improved Performance
This is why a timing light is a good idea, even if you're astute at tuning by ear. Timing marks allow us to see how timing events are unfolding. Watch them as you goose the throttle, which determines vacuum advance adjustment. Note how MCE Engines has marked this balancer: TDC, then idle timing at 12 degrees BTDC, then maximum advance at 34-36 degrees BTDC. This gives you a tuning window as a guide. View Related Article
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