[quote="CVPost-mmfan55"](quoted from post at 07:22:08 06/22/18) "There in lies my point. The 250hp
Chevy and a 250hp Cummins, both with
1 to 1 direct drive transmission,
will result in vastly different
outcomes."
- Yes indeed the outcomes would be much different. Running without a transmission would have only the rear end reduction. This would be an improper application and none of the engines would be effective to it's potential.
"Horsepower is supposed to
be a statistic at the flywheel. Not
as a result of gearing and
transmissions. When in vocational
school, I also was told the
mathematical formula that was
supposed to be used as to calculate
horsepower. I stand by my statement.
This day and time, seems that
horsepower ratings are based on
whatever formula the builder wants to
use."
- The formula is: HP = Torque x RPM / 5252. It is the result of the engine output and does not change with gearing. Included in my post was the AGT 1500 HP after the 10:1 reduction and the HP ahead of the 10:1 reduction, i.e. at the engine output shaft. The gear reduction increases the torque and reduces the RPM however, HP remains the same. For the formula, the RPM is the RPM of the shaft where the torque is measured.
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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