1.5 bar is the limit as Q4 uses a 250kPa MAP (100kPa for vacuum and 150kPa for boost, 100kPa=1bar=14.7psi)

Quote Originally Posted by juamin View Post
Im a little bit confused .
My pierburg definitively is not working . My boost is 9/10 psi at 3500rpm +/- . Now, if i install the manual boost controller and set it so the maximum PSI is 14.5 psi (1 bar). There shouldnt be any problem with that, thats right? . Obviously I cant boost 15 psi at 2000rpm because it will blow up to hell jeje. But if i mantanin the RPM VS Boost , it can be done? .
Suposing that i do this, i install the manual boost control and i set it up to 14.5 psi, the ecu will automatically set the fuel, timing ,etc based on the map, lambda and other sensor readings? . To finish, if i exceed for example, 16 psi, the ignition will cut ?
ECU will set timing and fuel based on MAP reading, that?s why it?ll cut off over 1.5bar, as no info of boost would be given.

OEM boost is set to a peak of 1.1bar and then goes down to 0.8bar