Like Scott and Brandon said drop your tire pressure down, 18psi up front and 30psi in the back to start. You probably still won't load the motor on most California tracks though so don't get too discouraged. Make sure you hitch is right at 26" and baby that thing out of the hole. The auto trucks have an advantage on the loose tracks by being able to control wheelspeed out of the hole, but you can make a stick work. Now for John Esteves's truck "SmokinMax", he did not have much of a load on his motor either, but remember, he has some really wide tires, and hanging weight up front, and an auto. Judging by the video he was able to get the sled moving faster out of the hole than you did. Now, don't go friggin burning down your clutch trying to keep the tires from blowing off, just get it moving smoothly and quickly while maintaining some clutch material on your discs.
-Tom