How to tell horsepower....
#11
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Here is my way.
A - if you get mud/rocks thrown in your face from the guy in front you don't have enough hp
B - If your throwing the mud/rocks in your friends face you don't have enough hp. You need to get him dirty and smoke him.
C- if your not doing either then your at the bar with me bragging about how much mud/rocks you can throw.
A - if you get mud/rocks thrown in your face from the guy in front you don't have enough hp
B - If your throwing the mud/rocks in your friends face you don't have enough hp. You need to get him dirty and smoke him.
C- if your not doing either then your at the bar with me bragging about how much mud/rocks you can throw.
#12
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Originally posted by: bigslim78
actually, i just did the formula he provided for the ds, and if all the numbers provided were correct then the formula is crap cuz no way is the ds close to 60HP at 5500 or any other RPM, not in stock form anyways
actually, i just did the formula he provided for the ds, and if all the numbers provided were correct then the formula is crap cuz no way is the ds close to 60HP at 5500 or any other RPM, not in stock form anyways
Perhaps it might be that at the crank and the 18hp that everyone else quotes is at the wheels .. in that case .. it's a 22% loss through the transfer of power to the wheels .. not a bad loss really ... so maybe it's true? Loosing 5.2HP from the crank to the ground .. whatcha think?
#13
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if you convert 57Nm into ft lbs you get .. first .. Nm into Nft is 57x3.281=187Nft
So, now you need to convert 187N into lbs .. that number is 42lbs.
So, you now have 42ft-lbs torque @ 5500 RPM which translates through his forumla as 44HP, most likely measured at the crank. Does that sound about in the ball park to you guys?
So, now you need to convert 187N into lbs .. that number is 42lbs.
So, you now have 42ft-lbs torque @ 5500 RPM which translates through his forumla as 44HP, most likely measured at the crank. Does that sound about in the ball park to you guys?
#14
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Originally posted by: blue250r
hope this helps
Definition
The term horsepower was invented by the engineer James Watt. Watt lived from 1736 to 1819 and is most famous for his work on improving the performance of steam engines. We are also reminded of him every day when we talk about 60-watt light bulbs.
The story goes that Watt was working with ponies lifting coal at a coal mine, and he wanted a way to talk about the power available from one of these animals. He found that, on average, a mine pony could do 22,000 foot-pounds of work in a minute. He then increased that number by 50 percent and pegged the measurement of horsepower at 33,000 foot-pounds of work in one minute. It is that arbitrary unit of measure that has made its way down through the centuries and now appears on your car, your lawn mower, your chain saw and even in some cases your vacuum cleaner!
Measuring Horsepower
If you want to know the horsepower of an engine, you hook the engine up to a dynamometer. A dynamometer places a load on the engine and measures the amount of power that the engine can produce against the load.
Torque
Imagine that you have a big socket wrench with a 2-foot-long handle on it, and you apply 50 pounds of force to that 2-foot handle. What you are doing is applying a torque, or turning force, of 100 pound-feet (50 pounds to a 2-foot-long handle) to the bolt. You could get the same 100 pound-feet of torque by applying 1 pound of force to the end of a 100-foot handle or 100 pounds of force to a 1-foot handle.
Similarly, if you attach a shaft to an engine, the engine can apply torque to the shaft. A dynamometer measures this torque. You can easily convert torque to horsepower by multiplying torque by rpm/5,252.
You can get an idea of how a dynamometer works in the following way: Imagine that you turn on a car engine, put it in neutral and floor it. The engine would run so fast it would explode. That's no good, so on a dynamometer you apply a load to the floored engine and measure the load the engine can handle at different engine speeds. You might hook an engine to a dynamometer, floor it and use the dynamometer to apply enough of a load to the engine to keep it at, say, 7,000 rpm. You record how much load the engine can handle. Then you apply additional load to knock the engine speed down to 6,500 rpm and record the load there. Then you apply additional load to get it down to 6,000 rpm, and so on. You can do the same thing starting down at 500 or 1,000 rpm and working your way up. What dynamometers actually measure is torque (in pound-feet), and to convert torque to horsepower you simply multiply torque by rpm/5,252.
If you plot the horsepower versus the rpm values for the engine, what you end up with is a horsepower curve for the engine.
just kidding some one will know the hp of your bike , hope your still awake if you read that
hope this helps
Definition
The term horsepower was invented by the engineer James Watt. Watt lived from 1736 to 1819 and is most famous for his work on improving the performance of steam engines. We are also reminded of him every day when we talk about 60-watt light bulbs.
The story goes that Watt was working with ponies lifting coal at a coal mine, and he wanted a way to talk about the power available from one of these animals. He found that, on average, a mine pony could do 22,000 foot-pounds of work in a minute. He then increased that number by 50 percent and pegged the measurement of horsepower at 33,000 foot-pounds of work in one minute. It is that arbitrary unit of measure that has made its way down through the centuries and now appears on your car, your lawn mower, your chain saw and even in some cases your vacuum cleaner!
Measuring Horsepower
If you want to know the horsepower of an engine, you hook the engine up to a dynamometer. A dynamometer places a load on the engine and measures the amount of power that the engine can produce against the load.
Torque
Imagine that you have a big socket wrench with a 2-foot-long handle on it, and you apply 50 pounds of force to that 2-foot handle. What you are doing is applying a torque, or turning force, of 100 pound-feet (50 pounds to a 2-foot-long handle) to the bolt. You could get the same 100 pound-feet of torque by applying 1 pound of force to the end of a 100-foot handle or 100 pounds of force to a 1-foot handle.
Similarly, if you attach a shaft to an engine, the engine can apply torque to the shaft. A dynamometer measures this torque. You can easily convert torque to horsepower by multiplying torque by rpm/5,252.
You can get an idea of how a dynamometer works in the following way: Imagine that you turn on a car engine, put it in neutral and floor it. The engine would run so fast it would explode. That's no good, so on a dynamometer you apply a load to the floored engine and measure the load the engine can handle at different engine speeds. You might hook an engine to a dynamometer, floor it and use the dynamometer to apply enough of a load to the engine to keep it at, say, 7,000 rpm. You record how much load the engine can handle. Then you apply additional load to knock the engine speed down to 6,500 rpm and record the load there. Then you apply additional load to get it down to 6,000 rpm, and so on. You can do the same thing starting down at 500 or 1,000 rpm and working your way up. What dynamometers actually measure is torque (in pound-feet), and to convert torque to horsepower you simply multiply torque by rpm/5,252.
If you plot the horsepower versus the rpm values for the engine, what you end up with is a horsepower curve for the engine.
just kidding some one will know the hp of your bike , hope your still awake if you read that
UMMMMMMMM,,,,,,,,,,Damb![img]i/expressions/face-icon-small-happy.gif[/img]
#15
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sounds near enough to me[img]i/expressions/face-icon-small-smile.gif[/img]
Be a star man and work out the outlander 400 for word up it was his post to begin with
Just so you know i plagerised the text on hp but it should be good info i took it from a reliable source
Be a star man and work out the outlander 400 for word up it was his post to begin with
Just so you know i plagerised the text on hp but it should be good info i took it from a reliable source
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