An electrical engineer in Canada, Fred Winterburn, has been working with 6 and 12 classic cars for some years now and has developed a highly regarded CDI unit. The 356 guys are very impressed with his unit, particularly as it is one of the very few that work with 6 volt cars properly (Petronix and similar all are quite poor). The units would also work with early 911's and replace the reliance on fallible condensers (now made to a very short-life standard) and distributor points. At under AU$500 they will work with any distributor and coil and also allow the user to switch between the standard Kettering ignition system and the CDI and deliver far higher and more consistent voltage delivery. Reportedly with improved starting and reduced flooding. I am getting one for my 356 and if I didn't have an MSD in the 911, I would be getting one for that as well.
If you want some informative reading: http://www.capacitordischargeignition.com
If you want some informative reading: http://www.capacitordischargeignition.com
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