Because intakes can be designed badly that one side of the engine or a few cylinders need to or less fuel than the rest.
I've got 2 sensors and gauges mounted in my dual carbed longram intake engine.
While this ofcourse can almost be seen as two seperate engines, still the amount of variations between the carbs and engine sides is interesting to say the least.
Point taken. However Most guys are running good, aftermarket intakes. A long ram intake is an extreme example. I have heard of some 6-pack guys running staggered jetting as well but again not common. With a single 4bbl with central located jets to feed 8 cylinders there's only so much playing you can do.
