I was wondering this as well. Generally that's the perks with the smaller blowers. Lots of low/mid range torque. Even some have reported the 2.9 on 17lbs seems a tad lazy.Can run the same amount of boost with a larger pulley (someone said it I didnt quote)
I would think than that would shift the tq curve to the mid/higher RPMs and that 2.3 was lots of fun in the low RPM range. But I maybe science ****ing it.