Interesting dynojet article

[Halon]

So since Dynojet was basically seen as the first inertia dyno, and basically setting a standard, why other companies wouldn't just keep with that standard.

[niterydr]

Originally Posted by ju-on

So since Dynojet was basically seen as the first inertia dyno, and basically setting a standard, why other companies wouldn't just keep with that standard.

I think it was because the formula for calculating horsepower was based of an overzelous honda V-max and the actually numbers were fudged with to make the powerlevels "fit in". Page 2 on the article has some more info on that, I believe.
(maybe page 3).
The cool thing about dynojets is the repeatability for testing parts.