Reply to "engine dyno vs chassis dyno"

George PAdmin.

My observation Larry has been about 19%, I like to round it off to 20%.

Keep in mind, besides the losses in the transaxle, the air temp in the engine bay, the weight of the wheels & tires and the efficiency of the exhaust system will be three major contributors to the differences between the figures for engine dynos & chassis dynos. So I wouldn't personally expect the losses from one car to another to be consistent, I would expect some variations.

Yet all of the figures I've seen published in PI Mag since about 2000 have all been remarkably right around a 19% difference.

cowboy from hell

6/20/078:34 PM

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