Re: Engine Help...
A shorter tire doesn't have the same effect as a gear change. The gears multiply torque. 3.73 to 1 multiplies the rotational force by 3.73 times. 4.30's multiply by 4.3 times. So lets say the the driveshaft is applying 400 ft.lbs of torque. (400x3.73) divided by two. Two tires right? this equals 1492/2=746ft.lbs at each wheel.
(400x4.3)/2=860 ft.lbs of torque applied to each wheel.
A shorter tire will not multiply torque. A taller tire will allow for a taller gear and a greater torque multiplication. The only time you would want to move to a shorter tire is when you are in-between optimum gear ratios. Even then the change is minor.
Run the 28x10 only if you can't fit an even taller tire, and then calculate the optimum gear for shift rpm and mph.
|