I just installed DEFI boost/EGT and OP. The boost readings that I am receiving are peaking at 17.3 and then down to 16 psi. Seems to be high for a stock 2007 STi. I tapped the OEM BPV in the intercooler but the T fitting does not have the restrictor like the one in my old gauges in my old WRX. I am using the Y fitting that came with the Defis and does not fit too well.

2nd gear 17.3 psi.
3rd about the same
4th around 15 psi.

My vac. is around 19-20 at idle. Is this withing the parameters???

Is it the defi-D gauge? they are known to read a bit (1psi or so) high. I had a D-gauge that would read higher than my autometer on the same vehicle same day same conditions.

Defis are BF imperial

^ oem baby:disco:

it reads the same as mine

Mine run the same way and Im using a catback. I thought it was creep.