The Ignition Coil is an electrical transformer. It converts low battery voltage into the high voltage needed to create a spark.
- Follow this link to learn more about How the Ignition Coil Works.
Most ignition coils are sold by application. This means you can find the right coil by using the Year/Make/Model and the Make/Engine search filters.
If you are looking for upgraded or universal coils, there are many to choose from. Knowing about a few key features will help you make the best choice.
Coil Style
Depending on the design of your ignition system, the coil will be 1 of 3 basic designs. Follow the links below to learn more about each one.
Primary Resistance
Primary resistance is a common spec used to choose a coil. Many electronic distributors require a coil with a minimum primary resistance. It also helps to determine maximum voltage.
- Follow this link to learn more about Primary Resistance.
Turns Ratio
The turns ratio compares the number of windings in the primary and secondary circuits. Generally, a higher turns ratio will result in higher output voltage. 100:1 is a common ratio.
Maximum Voltage
Max output voltage is the result of:
- Primary resistance,
- Turns ratio, and
- Input voltage.
Less resistance, more turns, and higher input voltage creates higher output voltage. Higher output voltage creates a stronger spark. This results in better combustion and, ultimately, more power potential.
