cobb ap boost measurement inaccurate

[blkspeed307]

alright just got my ap last week updated to beta bt tuning to obtain bt based ots maps, car runs good but today when i checked the boost on live data on ap its off by about 10lbs from what my boost gauge is reading (defi blue racer). so i then checked boost reading with my aeroforce scan gauge & i get same readings as boost gauge so im thinking its not the boost gauge it must be ap.
any suggestions?
ill be calling cobb in the morning as well to see what they say

[SSinstaller]

Are you talking about boost or vacuum? The AP displays vacuum and boost in psi, most guages display boost in psi, and vacuum in InHg, which is why the AP would seem to be incorrect when in vacuum..

[blkspeed307]

now that u mention it u r probably right im going to have to take a look at it again tomorrow but both my dashhawk & aeroforce gauge had the exact same measurements as boost gauge. So once i go from negative vacum ex. (car is at idle)to positive or boost
AP should have same readings as boost gauage, or should the ap be off all the way to max boost because they r 2 different units.
thanks

[blkspeed307]

just checked it all is good u sir r correct thanks for helping an ap noob out

[Enki]

You were probably looking at manifold pressure instead of vacuum/boost right? One is in one measurement, the other in two.