Rotor arm. Porsche 911SC 1978-83 / 930 3.0L / 3.3L 1975-89

Rotor arm



Fits:
Porsche 911SC 3.0L 1978-83
188Bhp & 204Bhp cars

Porsche 930 3.0L / 3.3L 1975-89

Bosch ref: 1234332223 / 1234332196

The "rotor" head is attached to the top of the distributor shaft which is driven by a gear on the engine's camshaft and thus synchronized to it. This rotor is pressed against a carbon brush on the centre terminal of the distributor cap which connects to the ignition coil either through the top and wired directly to the coil in HEI systems, or via the centre terminal in points ignition systems and remotely connected to the coil.

The rotor is constructed such that the centre tab is electrically connected to its outer edge so that voltage coming in to the centre post travels through the carbon point to the outer edge of the rotor. As the camshaft rotates, the rotor spins and its outer edge passes each of the internal plug terminals to fire each spark plug.

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93060290105

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