Went to radar run last weekend. My F7 EXT got 82.3mph in 1000 feet. I was expecting more. The run was in a stubble field with 6-8" of snow and the starting line was bare dirt when I ran. I spun a lot, but the sled seems to run the correct rpms and such. Does this sound normal or too low? I don't have studs and the sled is all stock. Of course I tip the scales at over 270lbs all dressed for riding. Any thoughts or advice would be helpful. Please, no wisecracks or putdowns. If you can't say it to my face, don't post it.