I’ve dynoed piles of motors that went into cars that go to the track.

I know first hand that some people have cars that just don’t work very well, for whatever reason.
That doesn’t mean the dyno is lying.
The motors that I’ve tested that run right on the number, and the ones that have beat the Moroso Chart........ and the ones that don’t even come close........ are all being tested on the same dyno.

There are waaaay less variables to contend with in the dyno room, vs the endless myriad of variables between different cars, tracks, weather...... not to mention the owners/drivers skill in maintaining, tuning, and driving the car...... then throw into the mix whether or not the overall “combo” is well matched.