for what's it worth, on one B engine I built the piston and rod assemblies
were massively out of balance when the machine shop went to balance them.
Invest in a scale and match the rods and pistons to get all the weights as
close as possible, or send the whole mess out and get it balanced.
Rick
On Mon, Aug 19, 2013 at 5:08 PM, Max Heim <mvheim@sonic.net> wrote:
> Ha, I'm not the one building the engine. But it's just a fact that the
> rotating assembly needs to be balanced. If you take weight off the
> piston/wristpin/rod assembly, you have to balance that by taking weight off
> the crankshaft counterweights. Unless you want to just pile weights on the
> external balancer and let the crank whip around viciously.
>
> So my guess, given the innate conservatism of the works engineers, would be
> that the internal components stayed the same weight throughout the
> production run. But, I haven't looked it up.
>
> So my advice to Lorne would be the same as yours -- research these parts
> thoroughly to ensure one isn't putting together an unworkable hybrid.
>
> --
>
> Max Heim
> '66 MGB GHN3L76149
> If you're near Menlo Park, CA,
> it's the primer red one with chrome wires
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