Engine dyno vs chassis dyno

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75evo
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Engine dyno vs chassis dyno

Post by 75evo »

The guy tests 2 cars on both the engine and chassis dyno

https://youtu.be/z2FdtRb94hw

Skip towards the end of the video. His math is a bit wonky, but it just proves that transmission losses aren’t a straight percentage.

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MD
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Re: Engine dyno vs chassis dyno

Post by MD »

This guy has more waffle than my supermarket freezer. Get to the point man !
The reality check is this:-
Irrespective of how you obtain a power figure, it is only meaningful if you know how well that power is going to propel the mass of what is sitting on the wheels. Of all the dyno figures that represent real road values, it is the in floor chassis dyno driven by the wheels. If the car under test is tied down correctly it will still produce a less than perfect friction to drive the rollers. This is exactly what your tyres do when the rubber meets the road. It also factors in your transmission losses so this is the power figure that you should take most heed of.

The only use for an engine dyno is for engine development so as to eliminate all the potential variables.
Transaxle Alfas Haul More Arse

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