[CamB]

John

As you know I am a big proponent of the MSD units. I haven't had mine long enough to know if there are reliability problems, but it made my car run great. It should run even better with a proper dizzy.

My opinion is that you should have some sort of CDI system, whether it be stock/Permatune, MSD or Crane. Porsche went to CDI to stop plug fouling and improve high speed running and it stands to reason that so should you. My rationale for the MSD over stock Porsche is that it is 20 years newer for the same price and thus more likely to be reliable (plus the multiple spark helps low speed running). Only real issue is mounting the MSD box and needing a tach adaptor for my tach.

As my sole data point, I can leave the car idling for 10-15 minutes and it won't foul the plugs, whereas my friend with a Lotus Elan and a Crane XR700 has no ignition problems except for plug fouling.

If I could, I would replace the points too (eg Crane XR700 or Pertronix), but this is probably not so important as the points are not carrying much current with the MSD.

Replacing the spark plug wires is mandatory. Get a new coil if funds permit. The MSD high vibration shouldn't set you back more than about A$80-90, which is very very cheap compared to the stock Bosch coil for CDI.

Cam