the centrifugal blowers dont start making boost at low rpm like the roots do.
basically a vortech at 2000rpm is the same as STOCK wot since there is no boost. a KB at 2000rpm is putting out WAY more power than stock since its usually at 75% or more boost by then. therefore, the KB is much more likely to make the car spin tires, so going with a steep gear and KB (or any other roots blower) just makes traction a huge problem.
with the centri blowers since low end torque/hp is just like stock (basically) you can run a steep gear and not worry too much about traction, no more than you did before the blower anyways.
for instance, my 96gt with vortech, stock gears and auto doesnt have much traction issues when pulling off from a light but once it gets moving (4000rpm+) i start spinning if i dont watch the throttle, same in second gear, no chirp or anything but as soon as it gets near 4000 rpm it starts spinning the tires again. steeper gears will make this much worse, but nothing like it would on a roots blower.
