At the same time, to get through the corner, the driver steps on the gas, transferring the pressure and heat to the back tires. From a tire's perspective, it is the equivalent of a total body workout. The San Diego street course has a few long straight-aways that are the fastest part of the course and will be pivotal in the outcome of the race. The result is the transfer of 650 horsepower, through a 2,700-pound car to a tire contact patch of no more than 13 inches wide on each corner of the car. And the tire has to last through such a launch for many laps.
Oil typically builds up on the racing line, making things slippery.
Unlike racing on an oval track, guiding a Trans-Am car on a street course like San Diego requires constant adjustments by the driver. Gears are being shifted up and down as the cars enter and exit each of the 10-turns. It's a tremendous mental and physical strain on the drivers throughout the race. Several Drivers to Watch at San Diego. San Diego is the fourth street course on the BFGoodrich Tires Trans-Am Series schedule.