Originally Posted by dfv2
There is no good reason to know exact boost outside of troubleshooting with the n54, the DME will control boost depending on a wide variety of conditions. You could hit 12psi and then 14psi back to back runs and make the same power due to timing, cam position, etc.
Sure there is... You don't see the benefit of making sure your hitting the right amount of boost your supposed to be hitting at any given time? I know modern electronics adjust boost according to outside factors, but it is NOT as significant as you all seem to think. Any problem that can create a boost leak will alter the boost reading more so than environmental factors any day of the year, in any conditions.
Its as pertinent a gauge in any forced induced car as your gas gauge is. AFR/Boost/EGT/Oil press/Oil temp are all pertinent in a boosted car, even more so if you track and are planning on modding anything to raise the boost levels.