Posted by farmer boy on November 06, 2012 at 07:20:57 from (66.209.49.50):
In Reply to: Re: True Horse Power posted by John T on November 06, 2012 at 04:28:59:
IF I understand this right the 13 hp deere will twice outdo the 25 hp lawnmower engine. While making 13hp the JD is making 70lbft but while making 25hp the lawnmower engine is making 36lbft. So technically if the lawnmower was heavy enough to gain traction, it could do the same work at slightly over half the speed. Another example. There is a certain person on here that has claimed that a 6.0L gas can keep up to a 6.6 diesel because HP is all that matters. At cruising speed (around 1700rpm) the 6.0(L76) makes about 325lbft of torque. The 6.6(LB7) makes over 500lbft at 1700rpm and stays there till 3000rpm. It's true that the 6.0 torque keeps going up with RPM (to a point) but it still never matches a 6.6.
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