Can someone tell me what the right offset should be for 16x6 fuchs wheel for a 914?

Need more info needed to answer you sir. Flared/Not flared makes a huge difference. You are probably referring to the 15" version as well which the 7s and 8s are a nice match with some spacing needed in the front i believe (Flared Only). 7"is basically the widest you can go on a non flared car and even that may be too tight for a narrow body. 16" is incorrect for the car however some do use them of course. do a search here for Fuchs Offset and a nice chart will show up in one of the threads. I am using 15x7 and 15x8 on my gt car.

You can usually go to a 205 with 6” Fuchs but all these cars are slightly different. 195 is also a good width.

16s fill the flares nicely with 225/50r16s but that doesn't help you...Click to view attachment

No idea on the offset. Someday I will have to check. I need a spare.

Fuchs is a name. The singular and plural are both Fuchs.

Fixed the spelling for you ...