Originally Posted by Wesman
Because shorter gearing does not give your car any more power. It just kills your fuel economy.
A car that has 430HP will have 430HP whether you have 3.42's or 5.13's. Meaning it will not accelerate any harder with the shorter gears.
All shorter gears do is help you get off the line harder and into the powerband. Thats how it improves ET's. Once the car is in the powerband though, it will not be any faster. That would be physically impossible.
So unless you launch your car on slicks at every stoplight, shorter gears would be nothing but a downgrade.
Your last statement is not true. Shorter gears will cause your car to accelerate faster until it reaches its top speed. They work from a stop or from a roll. Its not more HP, its mechanical advantage.