Does anyone know if there is a chart or something that would indicate what boost pressures would be at various engine rpm on a 2011 SD4 ?

Connect a good diagnostic code reader….Autel AP200 for instance…….look at live data which will give you the MAP..inlet manifold absolute pressure ……I.e. boost pressure…….amongst other readings……very useful I have found…. FL2 SD4 HSE Lux Auto MY 2012— current
D2 TD5 HSE Man MY 1999 470kmls….gone 2014 ….lovely engine..chassis rotten
D1 300TDI Man MY 1996 56kmls….gone 1999…D2 much better
Wife’s FL1 1.8P MY 2001 32kmls …gone 2007…has Mini since.

I am sure that the Boost Pressure will vary with Demanded Engine Load and not RPM.

It has been discussed before -- see link

https://www.freel2.com/forum/post437741.html FL2 XS SD4 Auto 2010 2012-2017 (21k - 91k miles) (MY2011)
FL2 Metropolis SD4 Auto 2014 2017- (16k - 84k+ miles) (MY2015)
Metro in its 11th Year of (Extended) LR Warranty / Full LR Service History
(Expensive, but Trouble/Worry free - hopefully?)

Thanks I have the icarsoft CR pro + and the Autel, the info is to make a comparison to what readings I get and the actual.

Thanks.