Drifting is the place to be if you are interested in powerful engine swaps. For example take Swedish drifter Martin Enmar’s Mazda RX-7 powered by a twin-turbo Viper V10. The monster engine puts down so much power it broke a dyno machine. The last reading they got was 900 hp to the wheels at 10.8 psi of boost.
Source: Driftlab via Speedhunters