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1977 Turbo Carrera warm up regulator

Fuel System

Vehicle Information: Year: 1977; Engine (Size, Modifications): 3.0; Total Mileage: 75,000;

According to PET, the 1977 Turbo Carrera had a unique to that year warm up regulator. Problem is, I can't find the specifications anywhere, including the factory manual, the factory spec book, and an old Bosch manual I have. It looks like it is plumbed for enrichment on boost, like the 78 and later cars, but the mixture unit is different, so I wouldn't want to bet on the later unit working well in a 77. What is the control pressure (cold, hot, and hot with boost) supposed to be in my car? My car currently has a 3.3 warm up regulator in it (Bosch 0 438 140 054), but I think that this may be making the car run poorly, except under boost. Thanks in advance.

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