COP Ignition Development

Yes, and results vary. A modified undercut reluctor, and accurate blueprinting improves.

I tested several VR distributors, back when I started doing this a few years ago for a single coil ignition w/rotor. I decided using a Mopar distributor is like cutting boards with a chainsaw, then measuring with micrometer. I made measurements with logic analyzer, and viewed on scope, significantly changing signal amplitudes vs rotor angle.

When one discovers the smoothness of an accurate cylinder timing balance, they might think is something wrong. Rev happy, without all the vibration and warbles.