cashizslick

Because you can ride the added power for a longer ammount of time. - thats why turbo cars have long gear ratios and NA cars have short gear ratios.

there is no reason to have short gear ratios on a turbo car since your power band is so wide, not narrow like a NA vtec motor.
i.e. longer gear ratios take advantage of the added power and torque from the turbo kit - boost increases linearly, so its stupid to gear the car with short ratios, the more you shift, the more power you miss out on with the turbo.

i guess what im trying to say is the more you shift the more you loose spool, and, since boost increases linearly, long gear ratios will allow the car to use more power.