Millions of years of evolution have given us all built-in barometers for risk. With the needle set too low you’d never leave your bed, too high and you probably wouldn’t last very long, so most of us naturally hover somewhere in the middle, happy to hop on a plane every now and then or eat spicy food, but leaving free-climbing skyscrapers to a select few loonies.
Car folk have a similar risk barometer when it comes to dyno days. It’s fun to learn how much power your car is making, but most of us know there’s a chance the car might not leave the rollers under its own power. If your risk-aversion outweighs your curiosity then you’ll probably give it a miss, while others will happily spend hours at the dyno subjecting engines and transmissions to dozens of pulls to find that extra horse or two.
Nobody really expects their car to go up
