I think we all understand that a 180° dual plane manifold cannot be made to flow as evenly across all of the ports as a single plane, that in addition to A > B comparisons there might be a significant different between the 4 fed by the left side of the carburetor and its plenum, and the 4 fed by the other, and that the highest flow to the best cylinder won't be comparable? I have more detail on this on my page here (I also ran this in "MoPar Action"):
http://victorylibrary.com/mopar/intake-tech-c.htm#dpI'm curious about something else: the actual cylinder pressure.
If the weakest cylinder has lower % VE, this means it will not be as "full" of mixture (same volume, lower mass) when the intake valve closes. The actual output of that cylinder will be lower.
The question: are any stock manifolds so bad that this may be a problem? It might show up as a colder plug in a weak cylinder.
