So say if you were to have a drag race, are you saying you should shift before redline? I always thought you should shift as late as possible
As soon as you hit peak torque, it doesnt take long before you are not gaining power, so better off changing up. Also you have very little time before you redline, so yes, change up as soon as you get to peak torque to avoid hitting the limiter
Surely you should change at the point the torque in the gear you are changing to is greater than the gear you're in. So if the decline isn't sharp and the same or more torque isn't available then it may be quicker to stay in the gear.
Think CTR VTEC, and if you change gear at the right time you're right in the sweet spot for the next gear. Get it wrong, and it's horrid!