a few 400-406 SBC related threads and tips


The Grumpy Grease Monkey mechanical engineer.
Staff member

watch the videos, as they contain several tips you can use keep in mind that the 400 SBC , in O.E.M. form,
has a larger , block bore diam. and larger crank bearing diam, and in factory form it uses shorter than the common 5.7" connecting rods,
the larger bore allows the larger displacement for a given stroke, but the larger bore block required Siamese block walls, thus no coolant between the cylinders

AND A 750-850 CFM carb wakes up many 406 high compression SBC engines if they have at least 10.5:1 compression and a cam with at least 245 degrees duration at .050 lift cams
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