TDC (top Dead Center) or 0 degrees if everything is stock. but to adjust it you must unplug the tan wire w/black stripe located on the firewall(pass side)next to the fuel and other relays. the computer automatically advances the timing electronically.
8 degrees BTDC-- Before top dead center.
8 degrees Before top dead center.
8 degrees before top dead center
6 degrees BTDC / Before top dead center
8 degrees before top dead center.
4 degrees before top dead center / BTDC
6 to 8 degrees before top dead center.
4 degrees BTDC / Before top dead center.
4 degrees before top dead center
28/30 degrees on the dwell, the timing differs depending on the vehicle, start at 8 degrees before top dead center, it should run
4-degrees BTDC. Before top dead center. The Heavyduty sets at 8-degrees BTDC.
6 to 8 degrees before top dead center. STOCK ENGINE