Enjoyed very much
I might not have given you the right video... let me check...I have to admit my car doesn't hang about and I can easily induce wheel spin in the first 4 gears, a high RPM gear change above 100mph will spin the wheels, so the engine is certainly producing a good amount of torque still.
The details I look for on Dyno runs are the things most people know little about, and that is Barometric Pressure, Ambient Air Temp, Intake Air Temp, Ramp Ratios, Inertia Ratios etc.
Any one of these can be tweaked to give higher or lower readings.
Also on the video you posted the 429 figure is their own calculated engine power and not power at the rear wheels. They have a Barometric reading of 1006 which means it's well above sea level, if we knew the location we could find out if this figure is way out or somewhere safe. I also noted there was no temperature reading at all with the result displaying 0.0 degrees, this alone is enough to make the results only fit for the bin.