The Definitive Torque vs. Horsepower post
Year after year, I keep seeing the same old debates about torque vs. horsepower. Everyone seems to have a general idea that we are referring to power, but most don't really understand the relationshi...
Forum Discussion
With most dynos used today this statement is not correct!
"The HP curve is derived from the torque curve"
The inertia dyno system provides a fixed inertial mass flywheel and computes the power required to accelerate the flywheel (the load) from the starting to the ending RPM.
This is the type most used on most small trucks and cars.
Torque is not measured but calculated.
What is measured is the time required to rotate a mass to a set rpm.
This gives the power or HP required to do that.
A computer then samples various points comparing the rpm of the flywheel to how long it took to change rpm from point to point.
That is a known HP required to do that then torque can be calculated.
The rpm and time are directly measured during the test.
"The HP curve is derived from the torque curve"
The inertia dyno system provides a fixed inertial mass flywheel and computes the power required to accelerate the flywheel (the load) from the starting to the ending RPM.
This is the type most used on most small trucks and cars.
Torque is not measured but calculated.
What is measured is the time required to rotate a mass to a set rpm.
This gives the power or HP required to do that.
A computer then samples various points comparing the rpm of the flywheel to how long it took to change rpm from point to point.
That is a known HP required to do that then torque can be calculated.
The rpm and time are directly measured during the test.
