Dual-outlet wasted spark ignition coil for Fiat 500, 126 and Panda 30

Dual-output wasted spark coil, compatible with Fiat 500, Fiat 126 and Fiat Panda 30. A solution for powering both spark plugs directly without distributing high voltage via a distributor cap and rotating brush.

How wasted spark works

With each ignition pulse, the coil generates a spark simultaneously on both spark plugs: in the cylinder in the compression stroke, the spark ignites combustion; in the other cylinder, in the exhaust stroke, the spark does not produce combustion and is therefore called “wasted”. At the next pulse, the roles of the two cylinders are reversed.

It is not a conversion to electronic ignition: “wasted spark” indicates the way the spark plugs are powered, not the system that controls the coil. Simply replacing the coil does not automatically eliminate the breaker points and condenser.

Eliminates the distributor cap and rotating brush

With the correct conversion of the system to wasted spark, the two spark plug cables connect directly to the two high-voltage outputs of the coil. The distributor cap and rotating brush are no longer necessary to distribute the spark. This does not mean eliminating the entire distributor: the components that control the ignition and regulate the timing must remain operational according to the system configuration.

Recommended ballast resistor

We recommend pairing it with a compatible ballast resistor, to be chosen and connected based on the specifications of the coil and the system. The ballast limits the current in the primary circuit, helping to contain the heating of the coil and, in breaker point systems, the stress on the contacts.

Before installation: have a technician check the compatibility of the system, the required resistance value and the connections. Do not choose the ballast value without checking the electrical specifications.