DIM Electronic Advance Ignition

My first opto distributor for my slant 6 was done for a science class report back in 1971. It was discrete, and I fabricated all parts for a used distributor I got at a junk yard. I built a CDI unit and created the interface.

The sensor shown above goes in a VW distributor to replace the points. The other sensor location, and interruptor replaces point cam for direct fire ignition.

It was developed in 2003, and has proven to be reliable. While in a different arrangement, the V8 system will also permit direct fire ignition.

I first started with an OEM Mopar VR distributor. The inter cylinder spark scatter is larger than desired. Part tolerances, and magnetic circuit irregularities impact sensor timings.