I concur, all US figures seem plucked out of the air
They are, dynojet, mustang and the various other ones, some of the wheel figures are as high as our crank figures, lol.
Also not all Mustang dyno under-read, I think the one at Viezu will a little as its a double contact patch dyno I think, which will cause lower reading, just like maha MSR3000 from Powerstation and Tegiwa.
The absolute best dyno is MSR500, single contact patch, proper coast down calculation that can account for tyre pressures, gear ratio's, I believe maha is the only one in the world which can do this, all the others have an element of guess work, but on the flip side all the maha's seem to read low on wheel figures, even MSR500 though it is the closest.
Litchfield has the absolute best dyno setup, latest maha but their dyno room creates a vacuum to ensure not only does the car get cold air to the engine, but the whole underside of the car is cooled as well to keep catalyst cool etc. and prevent cat protection mode from kicking in which most modern cars now do so when cats get hot, basically they dump fuel to cool the cats and thus reduce power.
