Re: At what RPM is peak efficiency (torque) for M?

Posted by D Slater on May 27, 2007 at 14:45:11 from (72.65.141.110):

In Reply to: Re: At what RPM is peak efficiency (torque) for M? posted by agpilot on May 27, 2007 at 10:58:34:

agpilot, I don't claim to be a expert on this subject so here is some things I know and others I think. On stock M the maximum no load RPM setting is 1595 to 1600 area,maximum full load RPM is 1450. The PTO speed is 537 RPM at 1450 RPM. The stock engines make there most torque between 900 and 1200 RPM and don't drop much down to 775 to full governed RPM. Under light loads at full throttle these engines are operating maybe 30 or 40% below what there maximum RPM would be if not governed. At maximum load the load keeps RPM down until it lightens enough for governor to close butterfly in carburetor some. Back in the days we used them for heavy tillage the throttles were locked wide open and left there. On light loads the same most times just because of the slow forth gear speed. Of coarse fuel consumption was not looked at as hard as now.

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