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Re: Why would you have to MOD your CIS ?

> Uneven fuel distribution is a _major_ problem in hard-driven MB engines,
>  with #4 and #5 running very lean at times.

Actually, I think you mean uneven *air* distribution since the CIS system 
treats all cylinders equally ... that said, my limited -- and admittedly 
primitive -- flow testing suggests that both the MC and Ur-Q intake manifolds 
direct most of the incoming charge to the rear of the manifold.  This causes 
the rear cylinders to receive *more* air relative to those up front and since 
they all receive the same amount of fuel, this in turn creates a lean