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I have been looking for torque and power curve for the N's as well. The torque and power curves for the TO-30 and TO-35 are included in a sales brochure for each tractor. The brochure I have for the TO-20 does not include the curves. I don't have a sales brochure for the N's, but the curves could possibly be included there. I don't have much N literature, and I can't find any mention of torque in what I have. From information I have found the N's reached their torque at a higher rpm than the Fergusons did. The torque for the 9N/2N is 88 ft-lbs at 1500 rpm. The 8N is 92 ft-lbs at 1500 rpm. The torque for the TO-20 is 88 ft-lbs at 1200 rpm. From the torque curves in the sales brochures for the TO-30 and TO-35, peak torque is at about 1100 rpm. Torque for the TO-30 is about 106 ft-lbs. Seems strange, but the TO-35 is shown at a little less at about 100 ft-lbs. I didn't answer your question directly, but maybe that will be of some help.
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