more power out of my m

1. First thought - get out of the 8000# class with a stock M.
2. Second thought - thinking back on first thought, you didn"t say you ran out of power or traction. When I first read it, I assumed you were out of power, reading it again, I think you are out of traction with the front end 2 feet in the air.
3. If #2 is what is happening, get the nose closer to the ground - you"ve got 3000# to move around. When your nose comes up, your drawbar goes down. This then reduces the "up" pull on the sled which reduces the "down" force on the rear tires. Since you are essentially making hte pan of the sled heavier now you compound it by piling dirt in front of it.
4. How do your tires compare to the competition?