The balance test showed that 1, 2 & 3 are overall the weakest, with 1 showing nearly 20% lower #s than the strongest holes (5 & 8). I know 1 & 2 are usually weaker on smallblocks with this type of intake plenum. But doesn't #1 also has the smallest idle air feed hole? I have to assume GMs engineers did this for a valid reason, but wonder if making them all the same size would do any good.
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The Balance test also seems to vary from day to day.
The front cylinders are set to have more fuel and the rear less in the cylinders in the stock tune.
Drilling the manifold idle hole out makes no difference at all as far as i've seen, although the drillings on the Edelbrock LT4 manifold is a bit crap to start with.
Splits move around & seem to come & go on a whim.
Idle timing changes, I have seen affect the timing on the injector BPW which i would expect to increase the BLM splits. As the timing increases the bpw drops but more on one side than the other.
[QOUTE]I might have a touch of OCD so I take this statement as a challenge.
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