Haha! I was thinking way wrong there. It is a simple recirculating dv... Got it explained by a renowned engine builder here in sweden though... And thought it sounded reasonable enough. Hmmpf, boring, i wouldnt have built it that way. Stupid Abarth

If those setups get stuck? No, they shouldnt be. If they are, the builders of that valve are plain comic actors.

The valve is a bypass, which opens a "clear route" for the turbo charger, as can be seen on the picture actually

Yeah, our women sure is a tidy bunch...