hmmm... if the sard wg is fully open it should b at around 0.8 .
now the versions of c3s w/g's iv seen have varied from:
0.5~0.8bar
0.6~0.8bar
0.8~1.2bar
0.9~1.4bar...
perhaps u have a harder spring setup? i dont think the avcr has anything to do with it.. are u sure the vaacum lines are setup well? if i was u id disconnect the avcr (temporarily) & connect the vacuum direct from the turbo to the bottom port on the wasteagate.. confim how much boost ur running to see if the problem is from the wastegate or the avcr..
i had a k26 with a blitz wg, i remember lowest setting was 0.4bar & highest was 0.6bar.. then added the mbc & put it up to 1bar.. made one hellova difference tuning wise..
although the k26's optimum efficiency starts @ 1.2bar..
kon