kilgorq
Member
You can keep on believing that, but it doesn't make it a fact
Have you ever seen how engines are balanced?
When counterweights are cut down in size, something has to make up for the loss in weight. Racing machine shops regularly do this for a variety of reasons including providing more clearance to pistons in a stroker to reducing windage--BUT--when they do that, usually they "internally balance" the engine (no imbalance weight on the flywheel or the damper) by the use of heavier metal.
To do this, they drill holes in the remaining counterweights and add metal sufficiently heavy to replace the mass of the counterweight material that was removed.
In situations where the counterweight diameter was reduced, they have to use quite a bit of this heavier metal in order to get it close to the same "weight" (if you will) of that particular counterweight before it was reduced in size.
If the shop is only switching the rotating assembly from externally balanced to internally balanced, they don't need to use nearly as much--BUT--Because the location of the heavy metal is closer to the centerline of the crankshaft, it weighs more than it did placed further out on the flywheel.
When Ford removed the weight from the crank, they increased the imbalance to make up for it.
Now, you contend that this will make your engine "rev faster", but as I've already mentioned in a previous post--the resistance to the combustion pressure at the top of the piston due to the weight of the rotating assembly is the same (intertia) because the effective rotating assembly weight was not reduced overall--the connecting rods and pistons weigh the same, or are within a few grams of the assemblies prior to the reduction in crankshaft weight.
This is mostly due to centrifugal force, and the fact that while the actual weight of the crank was reduced, the placement of the heavier imbalance creates a situation where the same force is available to counteract the weight of the connecting rod/piston assemblies.
If you like, you can verify what I've described here with any physics professor . . .
What you say about the Centerline and Centrifugal force puts this in perspective. I follow the logic here.
I have seen an engine getting balanced but not to the point that they are cutting down the weight of the rotating assembly. They were weight matching the pistons and rod assemblies.