cast iron Prestolite/Pertronix ignitor conversion

[halifaxhops]

That makes sense. Explains all the red arrows you can see captured in the photo.

Some times for some reason you get that below 300 rpm on them with the amp no idea why.

 

[Mattax]

Nice machine from Paramount? I know the amp is Marks.

Yes. That's Rob's shop a couple years ago.
And the only reason I knew about the points for rpm was because I opened it up to clean the contacts with some spray. If I do it again I'll try de-oxit. Unless, maybe, just maybe, he's taken care of it by now. LOL

 

[Mattax]

Some times for some reason you get that below 300 rpm on them with the amp no idea why.

I couldn't get the timing on the low rpm scale and the high scale to coincide as well as I would have liked. Not sure oif that had something to do with my technique, the tach, or something else.

 

[KitCarlson]

I couldn't get the timing on the low rpm scale and the high scale to coincide as well as I would have liked. Not sure oif that had something to do with my technique, the tach, or something else.

Without knowing, I will toss out a guess. At low RPM without dwell control, the coil current could be really high. When it triggers, the adapter could be generating enough noise to self oscillate. That might make all lights go on, and unable to read timing. Simple fix or test would be, add ballast resistor to coil.