recently got around to putting the 3 inch decat pipes on my system, previously had a 3 inch pipe from just after the turbo (was welded on after the front cat came off), i've got a restrictor ring in and had before but for some reason shes 'ignoring' the controller and just maxing out, i think she'll o to 1.5 bar but came off the throttle at 1.4, even when the contrllers in off which should bring the boost back down to about 0.8.
any ideas, i changed the vaccuum pipes recently and she was working fine just before the swap, can the increase from 2inch to 3 inch pipe for the 1st 3inches be such a difference.
cheers
Rob S