Well I know for sure my zhp was 2.7 turns lock to lock. And there are a couple videos on bimmerfest (probably in the same thread) which show both zhp and non-zhp require 2.7 turns. I'm pretty sure the ZHP does not have a tighter turning circle than other E46s, but I have not measured this.
With regards to the PS pump - that'll effect tightness, not quickness.
Last edited by TerraPhantm; 09-25-2012 at 08:41 AM.