Marco Andretti breaks 233 mph on 'Fast Friday' at Indy

INDIANAPOLIS -- The horsepower boost sent speeds skyrocketing over 233 mph early on Fast Friday at Indianapolis Motor Speedway.

The Andretti Autosport cars quickly jumped to the top of the board with Marco Andretti logging a lap of 233.491 miles per hour (375.77 kilometres per hour). It's the fastest lap in a practice -- which is considered unofficial -- since Sebastien Bourdais went 233.116 mph in 2017.

The speed record at Indianapolis Motor Speedway belongs to Arie Luyendyk, who went 239.260 miles per hour (385.05 kilometres per hour) for an unofficial mark during practice on May 10, 1996. Two days later, he turned a lap at 237.498 mph in qualifying.

The Honda teams seemed to quickly adapt…