My dad has the Lamco boost gauge on his STI, and it seems to be measuring vacuum line pressure, like on those old "fuel economy" gauges. Floor it, needle goes all the way up, light gas, it barely moves. Except when I'm in the boost zone, it seems like it's measuring correctly...ish
Possibly NWS, I wasn't listening to what we were saying.
Try to ignore the arguing, and my sister's tendency to NOT watch the boost gauge and be really shaky. If you can get anything, and insight is really appreciated. If not, I can try to take another video. My understanding of boost and boost zones may be incorrect, so feel free to inform me on those as well.