why do evos dyno in 3rd gear and not 4th?

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Sep 1, 2006, 07:27 PM

#46

jbrennen

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Quote:

Originally Posted by Ralph

Try this link KevinD

http://madscientistmatt.blogspot.com...eter-does.html

And it says there, and I'm quoting from your source:

Quote:

On a chassis dyno, however, you can only measure the horsepower being used. To obtain a torque measurement requires taking the RPM readings and reversing the above formula to calculate torque.

So a chassis dyno measures horsepower. Engine torque is derived from HP by the formula Torque (in ft/lbs) = HP x 5252 / RPM.

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Sep 1, 2006, 07:46 PM

#47

KevinD

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Quote:

Originally Posted by Ralph

Chassis dynos read TORQUE/RPM. Horsepower is a number calculated from TQ & RPM.

HP is the result of Torque x RPM / 5252

Not sure where you heard "Horsepower" or "Power" is measured...

Try this link KevinD

http://madscientistmatt.blogspot.com...eter-does.html

*scratches head*

did you even read your own source? it said the exact same thing i said

and no, you are wrong. both myself and your source stated that chassis dynos measure Power. not torque. torque is calculated with the RPM and the power measured.

read jbrennens quote from your own source. it looks a lot like what i wrote.