balancing

My buddy bought a +030 351 it is a fresh build, never fired, capable of 6800-7000 rpm. But it is equipped with rebuilt stock rods. Question is, would a set of Eagle H beam rods 21 grams heavier than the stock rods require re-balancing? No problem if it does we'll get it done, but I didn't know how much weight change we could stand till it is required.

hpwdboss1 wrote:My buddy bought a +030 351 it is a fresh build, never fired, capable of 6800-7000 rpm. But it is equipped with rebuilt stock rods. Question is, would a set of Eagle H beam rods 21 grams heavier than the stock rods require re-balancing? No problem if it does we'll get it done, but I didn't know how much weight change we could stand till it is required.

Probably ... it may have been on the heavy side of factory spec if you wish to take that chance but, you won't know that until it gets spun or run.

Factory rods are pretty decent in a Cleveland as long as the bolts have been upgraded.

Is it a Cleveland?

dfree383 wrote:Factory rods are pretty decent in a Cleveland as long as the bolts have been upgraded.

If it is the Cleveland the rods are pretty good I turned mine 7500-8000 rpm with no problems until I dropped a valve and turned one rod into a s shape I put close to 25,000 hard mile on it

It's a Windsor with new ARP bolts, but he's bought the Eagles and wants me to  put them in. Its rollered and could get re-cammed a little later, so I'll put them in. Sounds like I should just take them and have Mcgunnegil spin it up and see. Thanks!

Yes heavier should be rebalanced, you can get away with a little lighter.

Thanks guys! I will feel better for having checked anyhow. Playing is to costly to save a little money out of ignorance and have problems because of it. I think my mother said penny wise and pound foolish.

hpwdboss1 wrote:Thanks guys! I will feel better for having checked anyhow. Playing is to costly to save a little money out of ignorance and have problems because of it. I think my mother said penny wise and pound foolish.

Yes