Craig Breedlove has eased the pace of his attempt to regain the title of the fastest man on land to give himself more shakedown time in his jet-powered car, publicist Marc Samson said.

Breedlove was expected to begin making runs as fast as 400-500 mph Monday with the assault on the record coming as early as today.

But the car had not arrived at the remote desert site 100 miles north of Reno by midday Monday and with forecasters calling for sunny skies and gradually warming temperatures the rest of the week, Breedlove decided not to rush things.

Breedlove, the first human to drive faster than 400, 500 and 600 mph, notched his previous records on Utah’s Bonneville Salt Flats.