Was just wondering....I have a boost gauge still in my car from when I had an FI system that I ended up removing (long story). My question is this:

Can I assume that when I am at 0psi that I am also at WOT?

I know that since the Z is drive-by-wire, accelerator position doesn't perfectly correlate with throttle opening but I was just wondering whether I could use the boost gauge to monitor WOT status in conjunction with my Nitrous use. It would seem logical that if my boost gauge, which reads off the intake manifold is reading 0psi, then that would indicate full atmospheric pressure which in turn would mean a fully open throttle plate. Am I correct in making these assumptions?