Great idea! However, maybe there should be a regulation setting so you could allow people to only drop it to 88.8%, or 66.6%(Your custom liking). I say this because I race in a league where we have 3 different Nascar classes(Regulated by power limiter). 2 of them go under 85%.
I love the idea though! I cannot stand when you can 4 times(Somewhat exaggerated) the amount of torque than horse power.