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2013-14 Shelby GT500
Gear Effect On Dyno Results
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<blockquote data-quote="SteveWK" data-source="post: 16330488" data-attributes="member: 139323"><p>It's not the dyno. It has everything to do with the angular acceleration of the wheels, brake discs, axles, and anything else that is being rotated by the ring gear. More torque is being applied to those components with a lower gear set. More torque equals faster angular acceleration and faster angular acceleration requires more power. So, the engine is using more power to "spin-up" those components faster and that leaves less for the dyno to measure. I'm sure friction plays a small part in this, but it is minimal compared to the losses due to rotational inertia.</p><p></p><p>Here are some links if you want more in-depth information. </p><p></p><p><a href="https://courses.lumenlearning.com/boundless-physics/chapter/dynamics/" target="_blank">Dynamics | Boundless Physics</a></p><p></p><p><a href="http://hpwizard.com/rotational-inertia.html" target="_blank">The Effects of Rotational Inertia on Automotive Acceleration</a></p></blockquote><p></p>
[QUOTE="SteveWK, post: 16330488, member: 139323"] It's not the dyno. It has everything to do with the angular acceleration of the wheels, brake discs, axles, and anything else that is being rotated by the ring gear. More torque is being applied to those components with a lower gear set. More torque equals faster angular acceleration and faster angular acceleration requires more power. So, the engine is using more power to "spin-up" those components faster and that leaves less for the dyno to measure. I'm sure friction plays a small part in this, but it is minimal compared to the losses due to rotational inertia. Here are some links if you want more in-depth information. [URL="https://courses.lumenlearning.com/boundless-physics/chapter/dynamics/"]Dynamics | Boundless Physics[/URL] [URL="http://hpwizard.com/rotational-inertia.html"]The Effects of Rotational Inertia on Automotive Acceleration[/URL] [/QUOTE]
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2013-14 Shelby GT500
Gear Effect On Dyno Results
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