Chain saw which became 300 horsepower with V8 engine on

Originally it is so powerful that it is mounted on a large car etc.V8 engineRidiculous chain saw "PREDATOR" movie using as power. It is a size that can not be raised unless it is two people, but it is possible to cut logs in a blink of an eye.

Details are as below. Maintain world record that can cut 30 inch (about 76 cm) logs in 0.88 seconds.
YouTube - Predator


It seems there was a chain saw of V2 engine and V6 engine so far.
YouTube - V8 Chainsaw


The cutting speed of the V2 engine's chain saw is like this. I feel pretty late.
YouTube - Harley Chainsaw