I just bought the charger and it does great in 1/4 mile drag races. But in a 1/2 mile, when it gets to 4th gear the power goes waaay down, it stays at the same speed and the other guy gets ahead. Now i think that it might be cuz i have a stage 1 drive train, but i also know that i might be able to fix it by tuning. however i could still use help.