The COM designed for the 60 HP 830 is not as useful with more horsepower in certain situations. It is hard for me to explain but with the converter locked up and 100 hp the drawbar pull is higher than the amount you can get through the converter at stall speed. I think our charge pressure may be a little low and higher charge pressure will increase the torque the converter will transmit. (increases heat too) COM is still handy for downshifting for headland turns while keeping the PTO speed up or starting a load smoothly on the road, like a full load of manure at the end of the lane.
Also we try to be nice to the lock-up clutch by backing of the throttle as you shift into direct drive. The first time I pulled the 830 naturally aspirated I picked too high of a gear when i shifted into COM the tractor just stopped because it was under a hard pull. http://vimeo.com/21607943
Basically I don't think you will be able to pull much more with a 930 in COM as you would with an 830 in COM, but if you you want the ability to shift on the go under light load it may be useful. Once the lock up clutch is engaged in will hold a lot of power, the 830, with the turbo on, has shown 150 on the dyno and we haven't slipped the lockup clutch....yet.
Have Fun, Joel Harnish This post was edited by JHH at 23:39:12 03/02/12.