I'm still learning here, I don't understand how an open exhaust has any back pressure .

The turbo creates back pressure in the intake manifold, unless you loose that pressure there shouldn't be any speed related loss of boost/ power ~ I've run the car wide open and discovered no loss of boost so I'm tying to understand this but failing .

The engine runs fine, sweetly in fact and now I understand why this heavy wagon takes off faster than my lighter Coupe .

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better