Rebuilding this little 273 Commando engine The goal is low budget and keep it as original as possible.
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That got me thinking about the rods. The stock 273 rods I was going to reuse without having any work done to them. They weigh in at 728 grams each. I also have a set of stock 340 rods that have ARP bolts, been resized, and the beams cleaned up a bit that weigh in at 748 grams each. They're 20 grams heavier than the 273 rods.
Not knowing a lot about the balancing. I usually just take it in and say balance it. In this case I know it is still going to need balancing regardless of what rods I use. With either combo it appears to me the bob weight will be lighter requiring balancing the crank is that right?
My next question is should I keep the stock lighter 273 rod? Or should I put in the better 340 rods?
Also noticed there is a couple grams difference on a couple of the original pistons and the new ones. What is an acceptable difference in weight between the 8 pistons and and even the 8 rods?