Originally Posted by GretchenGotGrowl
But that's how boost gauges work. So -12 psi converts to about 6.5 inHG (gauge). That seems about right for idle. Not sure how they will display it when it's really pulling some vaccum. Maybe the scale changes???
Ive never seen a negative number on a boost gauge unless you are dealing with BAR. 15-20inHg is normal for idling in my experiences. I've never heard anyone talk about negative PSI, its always vacuum(inHg).
Sorry for double posting on C7.com I figured it would get more traffic over there then here.