So about 23psi.hello again dear dlheman,
S207 and S208 have both better too end power as they reach their peak power @7200 rpm instead of the 6400 of R205 equipped w/ VF56 and S206 w/ VF58 because of better balancing and higher blueprint standards of their engines.
Their electronic managements are finer: ECUs are different, using larger memory and more aggressive/refined values not only related to turbo settings but to higher AVCS, too, for example.
To answer you about your last question, the peak boost levels we reached on a R205 are near to 1.6 bars and are held quite stably, w/ no issues.
Please consider that P25 te housings are not comparable to P16/P18/P20 ss ones.
Previously you were also asking about 2019 RA-R’s turbocharger, wondering if it’s a VF56: it’s a VF58