You could under one big end and hang it with the heavy one. Bob weights are set to one journal (2 assemblies). But I think you've done a good job to get where you are at with only 8 rods to work with. I don't think over all weight is that important. Nowhere on a typical bob weight work sheet is overall, just top/bottom.
Understand the process. Some methods have you weight big end and subtract it from total to get small end weight. Others recommend weighing both ends. So in the end total weight is in play. Just not used in the bob weight calculation. If I took off 8 grams to get big end to match, I would be well under the small end at that point as total weight should be down too.
I guess the point of big end compensated for at 100% matters, plus the small end is only a small portion of the reciprocating weight considering piston and pin. So better to have a difference on the rod small end, versus the big end which is the major contributor to rotating weight.
Appreciate the inputs.
Was under the impression you were to find the lightest small end and match the other 7 to that weight. Then do the same for the big end.
Why wouldn’t the overall weight be the same then?
Not any different than when you check weight distribution on a car. Measure the front then the rear. The total Is the total.
It is not that simple because as mention the physic/geometry.
I measured the small ends today, and remeasured big ends.
Then remeasured total, the problem is the added values do not exactly match total weight. One end is suspended and only one is on the scale. Plus there is a density of the rod issue and you do run into rods that have seem to have a higher density. I examined the pads and they are similiar in shape. Right now I have all the rods total weight correct, but there are differences in 2 rods where they have lighter small ends, but heavier big ends. I am also almost out of small area pads on these rods.
These are way better then as installed by Mopar where one was about 25 grams off, but frankly at least one rod is not really workable with the set. I do have a replacement I can use. It was just the weirdness that the lightest rod had the heaviest big end and a lighter small end.
