I thought maybe the gauge was off too, so I hooked the gauge to my air compressor. The compression tester agreed within a psi of the pressure I had in the air compressor leading us to believe the tester is accurate... Perhaps we're over-looking something here, or perhaps Dark's compression rings are a bit toasty from running so lean for so long
If the latter is the case, it's fortunate forced induction tends to mask low compression
As long as there' no oil blowing, we just need to up the boost--- once we can tune for it
Best,
Phil