Chip PT Pressure Transducer Question ECU

[SuffolkD at aol.com]

Minhea chip question.

The ECU now has a modified PT.
So when the car had the stock PT setting the dash showed 1.8 bar at "full" 
boost.

Mine had leaks and issues which a few of us focused on and fixed/repaired.
Now the Chipped ECU only reads 1.6 max no matter what (it was 1.3-1.5 in the 
past)
Yes 93 octane fuel used........

Q:  WHEN the PT is "recalibrated" does the dash display read lower because of 
the mod/recalibration?
So 1.6 = 1.8/9 stock?

Also, where would the best place to T into the vacuum lines for a VDO boost 
gauge?
By the ECU not optimum?

I've been told chipped cars read 0.9 at start up, but my old 10V avant showed 
0.9 non"chipped"..........even 0.1 under vacuum deceleration.
TIA - Scott by BOSTON