How tdc and bdc setting?

TDC (Top Dead Center) and BDC (Bottom Dead Center) are critical reference points in an internal combustion engine's cycle. TDC is the position where the piston is at its highest point in the cylinder, while BDC is where it is at its lowest. These settings are used to determine ignition timing, valve timing, and overall engine performance. Properly aligning TDC and BDC ensures optimal engine function and efficiency.