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05-03-2002, 04:50 PM

They measure torque, which is easier to measure than HP. At least this dyno that was this article was written on, torque was the main measurement. With a known radius at the dyno wheel, torque can easily be measured. From the torque numbers, HP can be calculated, which is torque divided by a factor. That's why typically, when you look at a dynosheet, the torque and hp numbers converge at 5250rpm, which is when torque = hp. I tend to agree with Brian more that wheel weight only affects torque and not horsepower. However, since there is no other way of measuring horsepower accurately (w/ taking into account wheel weights), the dyno HPs (which is a function of torque via equations) will be affected by wheel weights. Did any of that make sense?

05-03-2002, 04:50 PM	#4 (permalink)
Arnee Posts: n/a	One thing I've read on dynos........ They measure torque, which is easier to measure than HP. At least this dyno that was this article was written on, torque was the main measurement. With a known radius at the dyno wheel, torque can easily be measured. <br> <br> From the torque numbers, HP can be calculated, which is torque divided by a factor. <br> <br> That's why typically, when you look at a dynosheet, the torque and hp numbers converge at 5250rpm, which is when torque = hp.<br> <br> I tend to agree with Brian more that wheel weight only affects torque and not horsepower. However, since there is no other way of measuring horsepower accurately (w/ taking into account wheel weights), the dyno HPs (which is a function of torque via equations) will be affected by wheel weights.<br> <br> <br> Did any of that make sense?