How do you think they would work with Dyna 3 ohm coils and that maxi dwell with the chevy points?
Well, since the points don't wear electrically any more with this ignition, there wouldn't be much need for the Maxi-Dwell. That whole name was a misnomer: what they should have called it was the "Maxi-Current" ignition, as the ventilated points gave a full-ring contact and thus improved high-RPM coil currents, compared to Honda's stock points after 1970 (prior to that, you could get ventilated ground-side contacts for them, after that, had to make your own). Without transistors, the Maxi-Dwell unit has some advantage in the form of longer-lived electrical faces, compared to the regular points. With transistors, their built-in timing light won't work, as there is no coil kickback to light the little neon bulb.
You can run the Transistorized Ignition with Dyna 3-ohm coils in 2 different ways:
1. Use the Resistor Pack in line with the coils and the "Basic" ignition driving it.
2. Use the "Dyna-capable" type Ignition, but with a stock sealed-beam headlight.
The 3-ohm coils draw a lot of current, which impacts these older alternator systems. If you already have other accessories, like a 55/65W headlight (or bigger), and then add the 3-ohm coils, your battery will chronically run low. The Resistor Pack adds 1 ohm of resistance to the coil (+) side, which only slightly reduces the extra high voltage from those coils (see my test post), while making the bike happier.
One rider from SOHC4 contacted me about constantly-low battery problem on his CB750: he was running an 80 watt halogen headlight and 3-ohm coils. It required almost a daily battery charge just to ride to work and back. First he switched back to stock coils, which almost solved the problem by itself. Last I heard, he was going back to a more standard halogen headlight in hopes of improving the ignition later.
For max electrical performance, but with a strong headlight and coils, I still recommend the 1034 taillight bulb (stock) and a 50/60W halogen headlight, with Transistorized Ignition, a Resistor Pack, and Dyna 3-ohm coils. That's going to be my setup, as soon as I have time to stop building ignitions for everyone else, and work on my bike!
