Gordy explained that 5250 is where RPM and torque cross, but he said he'd check for me (Because it is a computer formual), but he thought it was Maximum horsepower divided by maximum rpm divided by 5250...Then he said, I've been up since 6 A.M. I need to think about this...
So.....Paul Pfaff's Gordon Jennings Jr. will help us, but not today!
He did pick up Trafficades' J Hydro for his kid, Gordy III...
Last edited by Ron Hill; 08-14-2010 at 08:45 AM.
Torque is a measure of twisting force. Imagine your torque wrench applying 100ft lbs to a large, stationary bolt. It's not moving, and doesn't create power...horse or otherwise, until it is applied constantly to a moving shaft. Think like the cranks on a bike.
Horsepower is a measure of work done in a given period of time. The same work can be done by applying a small amount of torque to a faster moving shaft, or a greater amount of torque to a slower moving shaft. Try it both ways and you can see for your self using the formula: torque x RPM, then divide by 5250. This coincidentally means that the torque value will also mathematically be the same as hp at 5250 RPM. Even if it's only 2 ft lbs.
This has nothing to do with the RPM at which a given engine will produce it's torque or hp peak. My diesel pickup will produce about 500ft lbs, but at under 2000 RPM. Some high speed racing engines will produce their peak torque near 10,000 RPM, but the same formula is used for both examples to calculate hp.
And yes Sam, there are some simplifications in the above to make it easier to understand.
It works for me
Since 1925, about 150 different racing outboards have been made.
Works for me too. Now to mess we you all a little bit, the constant is realy 5252, but then you all knew that, right .
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