Again it has to do with shifting the engines power curve, where is the power being used. As I said earlier. In the stock setup when belt reaches top of pulley engine speed will still increase depending on how much power the engine can still produce. By lightening the rollers the max rpm range for power is reached sooner before top speed. Drive your car/truck and pay attention for when the trans hits high gear, does the vehicle still pick up speed in high gear? Now try the same thing except to not allow the vehicle to go into high gear, do you still go as fast? Although it's apples and oranges the theory is still the same for they are both transmissions but one shifts with gears or plates where the other shifts using rollers. My experience with droping 14-12 you loose about 2-3 mph the lower the weight of rollers the more top speed lost
|