Probably started by my understanding that 164 's used the Brembo 2 opposing piston alloy calipers. Perhaps this is an Oz modification but I don't really know. The rotors and calipers were supplied to me for a conversion. Because the rotors were 164, I assumed the calipers were too but I must say I never checked that as there was no need to as the bolt up worked correctly straight away so I left it at that.
...so I wouldn't say we are not learning from this..I've just learned something new.
Well I am assuming you are suggesting to do this as opposed to meaning don't do this. Either way my factory limiter is by-passed and there is a breaking improvement from the rear as a result. As to putting a % on it, I would estimate around 10% perhaps. Not experiencing rear lock ups in the wet either.Go remove the brake pressure limiters and get 50% shorter braking distance.
No doubt we are experiencing different results due to different tyres, pad formulations and other friction areas such a road surfaces not being the same world wide. So what works for me may not necessarily do the same for you. For example it is not the first time I have read that guys are using DS 2500 compound pads. These were a formula Ford reference track pad here. I have used them but didn't like them. For me, the Hawk pads work better. They are noisey and put out lots of black sheit on my rims - all the characteristic most people cringe about. As they say, horses for courses..