Daijoubu
Seasoned Member
I was. Thought it odd to see a boost gauge in in.Hg until it switched over to positive boost and showed PSI. I got curious and looked around to see that analog boost gauges are generally, in fact, in.Hg below 0 (vacuum) and PSI above 0 (boost).Think he was commenting on the difference in units for one pressure above ambient and one below.