The 427 / LS9 in the ZR9 made 803 HP on the Mast engine dyno, and we built the car around it. In this video, we brought the car to the chassis dyno down the street from our shop to see how everything worked in the car. We had a few glitches, including a drive-by-wire throttle limited to about 35%, but ended up putting over 620 HP to the wheels. Informative day.