Ok, well it sounds like my cheapo boost gauge is working just fine. I get 8.5 psi under hard acceleration at around 3000 RPM (I'll have to verify that later, I wasn't specifically watching out for the RPM before). The boost starts to kick in at around 1800 RPM. Under light driving under 40 MPH, it lingers at only around 2-4 psi. I will post any other observations or anything interesting I see.

Alex

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1983 300D (parked for four years)
2012 VW Sportwagen TDI Manual
2001 Miata SE
1962 Chevrolet Corvair Rampside