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Old 06-26-2011, 06:22 AM
Barry_R Barry_R is offline
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Dynos in the OEM universe are calibrated to an SAE defined set of specifications.

Dynos in the performance aftermarket are calibrated to the integrity of the owner.

Both are subject to legitimate variances due to outside environmental issues - temperature, humidity etc. These issues are addressed with software derived correction factors which are deemed reasonable but still not perfect.
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