The dyno is a magical place. It’s where fresh engines go to come alive; the last step in a long and exciting process, and where well-loved engines go??to hunt down a??few escaped horses.

But they do a lot more than spit out a piece of paper with a number and a graph. We recently took Stephen Borness’ wild ‘76 911 to the dyno for a tune, and filmed this video to learn about what goes down in the dyno, and why.