I've run blowers and turboes on daily driven RSX Type-S's with a compression of 11.0:1 stock, 10 psi no problem. Others with Type R blocks can hit as high as 12.0:1 with redlines at 9200 RPMs and have 10psi+ turboes, too. The engine just has to be strong.
I'd assume a German engine is stronger than a Japanese 4-banger.