Wondering if there is rule of thumb for stall increase with x amount tq increase. Kind of like the 100 lb = .1 in 1/4 deal.

Observed stall divided by the square root of torque. This your K factor.

Then use the k factor number you came up with, and times it by the square root of torque.

Mike thanks.

Works out to about same thing Greg said on a related question,just didn't get the how to find later when nobody around to ask. So I learned something new today which means today is not a waste.

You're welcome, and I concur. It keeps it interesting.