3 pin ignition module CDI box. Porsche 911 / 914/6 1965-77 basic version

3 pin Ignition module CDI (HKZ) box
Basic version
(Bosch reference 227-200-001)



Disclaimer: Before fitting this CDI unit please make sure the new PERMA-TUNE coil is being fitted with it. Do not try to start the car with Blue Bosch coil made in Brazil. This will damage the Perma-Tune CDI box and void the warranty. If CDI unit was not purchased with the PERMA-TUNE coil the warranty will not be respected. Fitting with other brand coils at your own risk.

Perma-Tune Gen 6

Fits:
Porsche 911 1965-77
Porsche 914/6

Take your pick: Basic or Premium

The Gen 6 Perma-Tune comes in two models: the Model Premium ignition module and the Basic ignition module.

The Basic model is just that, basic: it performs only the same functions as the analog modules did back in the day. For the average street car, this may be all that is desired and of course is more affordable than the Premium model.
It is however still a high performance part and is perfect for racing venues that do not allow programmable digital ignition systems. The Basic model has a smooth, more original looking housing than the Gen 5 cast housing.

DISTRIBUTOR TRIGGER SIGNAL

The second most common cause of SC engine ignition failure is the ignition trigger circuit.
Since the ignition box is controlled by the magnetic pulse generator located inside the distributor, any disruption in the triggering signal will cause the ignition box to malfunction. Be aware that the connectors can push back in the housing. Pull the rubber boot back to inspect the connection between the box and harness.
Full disassembly and inspection of the distributor is highly recommended due to the intermittent nature of triggering problems. Pay special attention to the distributor trigger shielded cable ( green wire ), magnetic pulse generator magnet and magnetic pulse generator winding connection as these parts are known to fail in combination. An especially common problem is a broken magnet pole. Evidence of arching between the magnetic pulse generator magnet points indicates a defective rotor. In this case replace the rotor, magnetic pulse winding, green wire and ignition box. The Perma-Tune high performance triggering is so accurate that worn out distributor shaft bearings can be detected by the tachometer. This is indicated by the tachometer needle slightly bouncing at idle. Trigger signal problems can cause double triggering which results in a weak ignition spark. Due to the lower triggering resolution of the stock ignition box, some symptoms of trigger signal problems can be more evident after the Perma-Tune is installed. Refer to the vehicle maintenance manual for triggering signal wave form specifications and distributor repair instructions.
To quickly test the triggering circuit without the use of an oscilloscope: Unplug the harness connector from the ignition box. Refer to the 911SC Installation Instructions diagram, connect an Ohm meter between pins 3 and 6 of the harness connector. To prevent the possibility of misdiagnosis, tug on the green triggering signal wire located at the base of the distributor while viewing the meter. The published specification for the magnetic pulse generator is 600 Ohms +- 100. Our experience has shown that a variation of +- 25 Ohm indicates a need to repair defective connections or to replace the magnetic pulse generator windings.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91160270700

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