It has to do with the original way Dynojet set up their correction factors. You can actually make more power on a Dynojet AFTER drivetrain loss, than with the engine mounted directly to an engine dyno. BUT, Dynojet numbers are the most common, and are often referred to the most. As a result, many other dynos have adopted a policy of correcting to Dynojet output.cheapbastard said:dang Kuhlka, what's up with that dyno? I've NEVER heard of any Busa(much less most of them), pulling less than 150hp at the rear wheel! Sumt'n doesn't sound quite right there.