Mini Sports Coil - High Power - 1.5ohm ballast type

12 Volt high powered sports coil - 1.5ohm resistance suitable for ballast ignitions systems.

What is the difference between Standard and Ballast ignition systems?

A Standard 12 Volt ignition has a standard ignition coil that produces a full power spark at 12 volts.

Ballast ignition has a ballast coil that produces a full power spark at a reduced voltage , the voltage is dropped by placing a ballast resistor or a resistor wire in the live feed to the coil. The coil will have a second feed running from the starter solenoid, this will supply a full 12 volts on cranking giving the coil 125% the voltage it needs enabling a stronger spark at start up. Once the car is running the 2nd feed is cut and the coil will be powered by a reduced voltage.

How can I tell if I have a standard or ballast system?

Most British cars had a standard ignition up to early 1970s when replaced with the ballast system.

• Standard system will only have 1 wire on the + side of coil. (Not including any suppresser wires)
• Ballast system will have 2 feeds on to the + side of coil. (Not including any suppresser wires)

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