You find the autogage (which is autometer) to be inacurate? My mates one was bang on.
Autogauge on the other hand is usually inacurate.
I run an autogage one but have never checked my particular one to see if it is accurate. HKS, Greddy etc should be closer to correct as they are a bit more pricey.
Sorry no, I meant Auto gauge (realised that when I was in Pioneer this afternoon ) When I sold my old MR2, I swapped my Auto Meter gauge for a Auto Gauge one, and mysteriously gained 2psi.
Also had a Blitz Dual SBC in the car which read boost pressure as well for a reference.