I re- geared it for Carl Phillips. I told him not to, but he wanted to do it. That’s when I learned about the newer NWSL case distortion.
Pat - I have had motor discussions before. In a nutshell -
I used the 9434 Pittman almost exclusively for my first ten or so scratchbuilts. With the 24:1gearboxes they were ok. I forget when, but sometime in the mid ‘90’s I got my hands on an 8424. I was so pleased with the smaller size and higher rpm I never looked back. At one point I was ordering them by the box directly from Pittman. My motors are always rare earth, ball bearing, and silver graphite.
One of the locals was ordering the 9236 with 7 1/2 volt specs. He said it worked fine at 12-14 volts.
Even the 12 Volt 8000 motor is not fast enough for the Williams gearbox. If you put a 12 Volt 9000 series motor in there your Challenger will smoothly crawl out of the yard heading for about 30 mph top speed.
Awaiting your results. I will try not to inject too many more opinions here - but if you haven’t tried the 8424 with Toyota hose and a long shaft 653-6 gearbox you are truly missing something.
