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911 CDI+ (6 Pin)

Categories: CDI+ Ignition
911 CDI+ (6 Pin)

The Classic Retrofit CDI+ unit requires no modifications to the original wiring loom harness or metalwork and is 'plug and play'. Our custom aluminium casing sits perfectly in your engine bay for a very attractive appearance. All Porsche 911 CDI+ units have a 48 MHz microprocessor onboard to control ignition timing.  Our electronics module can also be retrofitted into an original case by special request.

Lightly restored owner's original casing:

State-of-the-art electronics inside:

Original CDI is now an old and unreliable electronic system which does not age particularly well:


Two six-pin boxes in CNC cases on a twin-plug 911:

A demonstration of constant spark output at all battery voltages and RPM:


The CDI+ 6 Pin unit is our direct replacement for Bosch CDI boxes fitted to classic Porsche 911 SC models from 1978 to 1983 on the SC and 930/911 Turbo to 1989. Extensive development and rigorous dyno testing has proven our CDI+ unit to be a major improvement over the original Bosch CDI unit, with improved torque right across the rev range.

We have now supplied several hundred CDI+ units to very happy customers all over the world. We support our units with a lifetime warranty: subject to zero electrical abuse! Check out the online Porsche communities for the many great reviews of our products - they are far superior to the cheaply made, unreliable alternative technology available elsewhere.

CDI ignition was originally fitted to a great many European sports cars of the 1970s and 1980s, including Maserati Ghibli, Alfa Romeo Montreal and are popular with BMW 3.0 CSL racers. Our CDI+ is a great upgrade for all of these applications.


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(See type specs below)

Type Specification

The road unit is a plug and play replacement for the Original Bosch CDI. It is pre-set at the factory (to your specification) and has the following features:

  • Hard RPM limiter
  • Soft RPM limiter
  • Launch RPM limiter
  • Adaptive multi spark at low RPM
  • Dual spark at high RPM
  • Shift Light output
  • Clutch pedal input
  • Tacho calibration

The following parameters can be adjusted using the hidden 'jog wheel'.

  • Hard RPM limiter.
  • Soft RPM limiter.
  • Shift light RPM.
  • Tacho calibration.

The unit comes with a laptop cable which allows adjustment of the following:

  • Ignition advance curve.
  • Soft limiter retard.
  • Hard limiter cut scheme.
  • Max RPM tell tale
  • Engine run time
  • MFI fuel pump cutoff RPM min/max.
  • Multi spark interval.
  • Launch control RPM limit.
  • Firmware updates

The unit works with the existing distributor without modification and can use the weights and springs for the advance curve. It can also be programmed with a custom ignition timing 'map' by connecting a laptop (cable supplied). The ignition map can either work with a locked distributor or by 'overlaying' advance on top of the standard distributor mechanical advance.

The race unit has the same features as the standard unit but incorporates a waterproof programming cable that can be mounted in the car. This allows easier access for frequent tuning/adjustment