Cold pressure is the least of the problems. I also have a BL WUR, on a turbo SC. I set the cold pressure to whatever BL said on the spec sheet. I think it's around 2 bar or so. Cold doesn't have much effect after it warms up anyway. I have also found that the WUR is very fussy regarding ambient temperature when you start up. So, I just get it to run OK at idle, and in two minutes or so, it's out of the picture.
I suggest you leave the CIS gauges on for a bit, and watch your pressures. I do know that some of the WUR's have different heaters in them, which sort of stages the heat up for faster warmup. I have a permanant gauge mounted, to observe the pressures, much easier than having the test gauges in the engine compartment.
