Speakers are important for this vid. The stuff he's saying about the vehicle is just astounding. V16 w/ 4 Turbo-Chargers. 10 Rads like Evan said. They tried using an F1 wind tunnel for testing, but the guys there said "nope... sorry. Our wind tunnel doesn't get up to 253 MPH like you want/need"
I think the biggest kick I got out of it was his comment on the amount of air being breathed by the engine... it moves more air per minute than a human breathes in 4 days!