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Camaro V6 LLT Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 06-10-2013, 08:26 AM   #1
usranger80
 
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Help me understand Dyno results

Ok, so I get the basics, it shows you the hp and tq (sometimes), and I am assuming that it is the rwhp that is being measured, correct? Does the % loss in this thread represent the amount of hp lost between the crankcase and the rw in reference to HP?

http://www.camaro5.com/forums/showthread.php?t=153186

So, for example, the one in the first graph show 257hp with a 17.6% loss, does that mean at the CC it is pulling 302hp? I have never done a dyno test I am just trying to understand them and verify what I think I know. Thanks
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Old 06-10-2013, 09:15 AM   #2
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Yes. Although it's "at the crank" and not crankcase.
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Old 06-10-2013, 09:19 AM   #3
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Think of it this way. The engine is attaced to the rest of the drivetrain. It has to turn the gears in the transmission, the driveshaft, the gear in the differential, the axles (with hubs and brakes) and the wheels/tires. All those things weigh something and some have friction. It takes power to move all that. So there is less power available at the wheels than at the motor.

Typically, a manual transmission is more efficient so they lose about 15% through the drivetrain. Automatic transmissions lose around 20%.
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Old 06-10-2013, 09:20 AM   #4
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