PENSKE PC-23B

BUILT IN secrecy by Penske for the 1994 Indy 500, this modified chassis debuted a new engine dubbed ‘Beast’. The 3.4L Merc pushrod V8 made 745kW+, due to a rulebook loophole that allowed an extra 4.9psi of boost. Al Unser Jr took pole with an avg speed of 367km/h, though the Beast was banned after just one race.