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yeah, people complain that dynojets 'read high' but the important thing is you can't easily mess with the calibration if you're using SAE, so it's easier to compare them to other dynojet runs. In Australia they mainly use DynoDynamics which when used with 'Shootout-6' calibration is pretty similar to SAE (and can't easily be fudged).
Every time I've had a 'stock' car on a Dynojet the expected WHP is pretty damn close to reality.
At least we don't have it as bad as europe where every dyo reports BHP (even though it's measured at the wheels) and some mixture of either KW/NM or PS/NM (KW/NM makes sense, but what's the point of PS/NM?). So everyone here who doesn't know better sees a euro dyno chart and thinks somehow they are making like 25% more horsepower, but they really aren't.
At the end of the day it's really a tool meant to tune an engine, yes it can be used to measure output but that's not the point - it's like using a torque wrench to determine the strength of a bolt. It can tell you any number you want depending on how you set it up, and each tool varies a little bit.
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