On a work saw you want the rpm's at 14,000 to 15,500 with alot of fuel.
The 031 was not a work saw, it was a racing saw. Yes, it would turn 19,000 or so. But, it had booster port cut in it. Had a homemade head on it, a cut down flywheel on it. 066 carb and intake boot. Build to run...