How To Properly Dyno and Are You Getting Scammed
 

One thing I have learned over the many years of dealing with cars in general is most people don't know a thing about dynos and their various settings or how to set one up properly. Or in some cases are just getting scammed.

This is also why if you are gonna post a dyno readout you should post the whole thing.
https://www.youtube.com/watch?v=QapIeFYj_8A

I just tagged this video to my watch later a couple days ago.

people often fail to understand that dyno pulls have sense only if you use them to compare to a previous run, or a baseline
ANY dyno will give different readings, there in America it s normal to see 200whp while in italy there are dynos that gives 160hp at the engine for a naturally aspirated fa20
Absolute number are useless and not trustable, only relative differences have a sense