^^^ This random 930 seems OK at idle revving ...
https://www.youtube.com/watch?v=IS-ZVQJFnQs
But yeah, the CIS dinotech is dirty but still cleaner than caveman carbs ! Note the dirty behind on that 930. That's the other weird thing ... all these carb boys seem obsessed with a clean posterior. The motronic on the 3.2 is space age by comparison and the pipes are soot free.