
Back in 2023 rotary guru Rob Dahm showcased a one-of-a-kind engine: a custom-built 12-rotor mill, made years ago by a person named Tyson Garvin. Dahm has spent the last year and a half, bringing it back from a state of disrepair ... while also making some upgrades. When you have an engine as crazy as this, you can't just leave well enough alone.