Oh Cool! Wild guess maybe an original commercial diesel truck like the 630? It's driven by a cable so maybe it was connected to the distributor or the generator. I could only find an example from a 1957 GMC 630.
"Adding CFM to a truck will only help at engine speeds you don't want to use." "I found there was nothing to gain beyond 400 CFM."
thats the useful rpm range for sure, but if i recall correctly the redline for a 6-cyl of that era is around 4200. i figure the tach for a gasoline stovebolt would run up to 4500. but i'm speculating.
I recall reading that a 216 engine redlined somewhere around 3,200 and a full pressure 235/261 redlined somewhere around 3,800-4,200, but can't seem to put my fingers on that documentation. I never hesitate to put the gas pedal down hard on my 261 in traffic, but I highly doubt I have ever exceeded 3,000 rpms with it.
-Patrick 1953 Chevrolet 3100 261 / 4-speed / 4:11 / Commercial Red
