Dyno
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Melting Slicks
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From: Rehoboth MA . . . NRA Life Member
St. Jude Donor '06-'07
Dyno
I've heard the term used here and know it's used to determine the horsepower and torque produced by a vehicle but would someone mind explaining the procedure in a bit more detail? I'd like to have my Z06 done and was wondering how it's actually done. 
Thanks in advance...
BobbyG
Thanks in advance...
BobbyG
Melting Slicks
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From: I finished a Marathon, did you? Michigan
CI 6-7, 9-10 Veteran
Your car sits on a machine with someone inside. They hook your car up to a computer and drive it at about 140 mph while it stays in one place. Kinda wierd to see for the first time. The data that is collected will give you your RWHP and RWTQ. You can have your air/fuel ratio checked out at the same time. Then, if you have taken your car to a reputable place, they can tune your car to get a little more out of it in regards to HP and performance. Oh yeah, Your car will be strapped down before they run it. Hope this helps as a start 
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St. Jude Donor '05-'06-'07-'10
BobbyG,The car will be moved over a spinning platform that measures the rotational force exerted by the rear wheels.
A dynamometer, or "dyno" for short, is a device used to measure RPM and torque from which power produced by an engine or other rotating device can be calculated. It is said to have been created by the "Father of Computing" Charles Babbage. There are two types of dynos: one that is bolted directly to an engine, known as an engine dyno, or a dyno that can measure power and torque without removing the engine from the frame of the vehicle, known as a chassis dyno.
A dynamometer works by absorbing the power developed by the test engine and measuring the torque required to do so. Power is then calculated from the torque and RPM figures and proportioned to a standard horsepower according to this formula :
HP = (Torque * RPM) / 5252
A dynamometer actually only measures torque and RPM, and power is calculated from those measurements. (This is the reason that horsepower and torque are always equal at 5252 RPM on horsepower graphs — when RPM in the formula becomes 5252, it cancels out the divisor of 5252 leaving only the torque figure as the power figure.)
A dynamometer works by absorbing the power developed by the test engine and measuring the torque required to do so. Power is then calculated from the torque and RPM figures and proportioned to a standard horsepower according to this formula :
HP = (Torque * RPM) / 5252
A dynamometer actually only measures torque and RPM, and power is calculated from those measurements. (This is the reason that horsepower and torque are always equal at 5252 RPM on horsepower graphs — when RPM in the formula becomes 5252, it cancels out the divisor of 5252 leaving only the torque figure as the power figure.)
Here is a photo of my car being strapped in on the dyno.
Here is a video of my car on a mobile Dyno at the National Corvette Museum.
www.theredlion.us/Dyno3.wmv
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St. Jude Donor '05-'06-'07-'10
Originally Posted by mean lx
Well, what did she put down. Sounds like he hit the rev limiter. James
Sorry, this is just such old news I didn't think anyone would be interested. I was just trying to show BobbyG what it looked like having a dyno run done.My car is a 1997 MN6 Coupe, basically stock. Blackwing intake and Corsa touring exhaust. Stock tune. I had a high of 308.84 hp and 317.21 torque. Not bad, all though a little lower than I was hoping.
Paul
