| A | B |
|---|
| Projected Nose Spark Plug(1) | A spark plug design with a longer electrode tip which extends further into the combustion chamber. |
| Resistor Spark Plug | A spark plug in which the spark is delivered in two stages. |
| Distributor Cap(1) | A plastic insulated cap containing a central terminal with a series of evenly spaced outer terminals in a circle around it. |
| Ignition Rotor | A rotating contact that routes secondary current from the coil to the individual spark plug wires. |
| Spark Plug Wires | A series of heavy guage insulated wires used to carry high voltage from the distributor to the spark plugs. |
| Ignition Timing | The relationship between the exact time a plug is fired & the position of the piston (degrees of crankshaft rotation). |
| Retarded Timing | If the spark plug fires later than specified. |
| Advanced Timing | If the spark plug fires earlier than specified. |
| Timing Light | A strobe lamp used to set the timing of the number one spark plug. |
| Magnetic Timing Meter | A tachometer that uses magnetism as a triggering device. |
| Centifugal Advance Mechanism | A series of weights used to advance engine timing as engine speed increases. Eg: a Governer |
| Vacuum Advance Mechanism | A mechanism installed inside a distributor that can advance and retard ignition timing in response to engine vacuum pressure. |
| Electronic Advance Mechanism | A more modern system that uses an on-board engine control computer to adjust the timing. |
| Projected Nose Spark Plug(2) | Due to its long tip this spark plug design tends to run hot at low engine speeds since the incoming fuel charge provides little cooling effect. |
| Resistor Spark Plug Ops(1st stage) | Voltage at the plugs center electrode rises rapidly to ionize the gap causing the plug to fire (combustion). |
| Resistor Spark Plug Ops(2nd stage) | This stage of Resistor Plug Operation causes radio interference & causes electrodes to wear. |
| Distributor Cap(2) | Used to distribute secondary voltage to the spark plugs. |
| Tachometer | Device used to measure engine speed in RPM (Rotations Per Minute). |
