Originally Posted by polyspheric

I'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.


This where you should be looking. AFR's between cylinders can vary greatly and there is a reason factory carbs came with booster tangs to improve distribution. Something to think about:

DC 34 Bulletin tech archives

Look at the booster mods for for Holley on page 20.

Have fun. up