Originally Posted by Clap135
I would like to add one thing to this. When tuning, picking a higher gear isnt only due to recorded load. It is also because you slow the rate of rpm down under full throttle. As we know the slower the rpm rate rises, the more chance the cylinder has to be filled with air. The more air, the more pressure, the more heat, the worse conditions become ect ect.
I was only pointing out to Mike variance between gears and one of the prime reasons why gear selection is crucial when dyno tuning (for a turbo car). On an NA car, I'm going to choose a gear with a higher load for the exact reasons you listed. I'm a big fan of tuning under harsh conditions.