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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