Micro Welding of bearing shell to rod housing bore

[Frank Castros]

Just thinking out of the box, how old is the Harmonic Balancer?

[Larry Hill]

At least 6 to 8 years old. Last time it was down I had crank checked for balance it was ok

[dragracerray]

What brand of balancer are you using?

[Ralph A Powell]

A good read on honing the big end of steel rods is in the SA Design Jenkins small block Chevy book I’d how he puts .002 shim stock the hens the rods round then removes it. The rod is now out of round but high rpm it stretch’s back round as I remember it’s when the rod does not have enough material at the parting line.

[Stan Weiss]

Originally Posted by Stan Weiss

OK, I have no personal experience with this problem. But have talked with someone who I believe had a similar problem. He modified his rod bearings to give a little more clearance in just that area and that seemed to fix his problem.

Stan

Originally Posted by Ralph A Powell

A good read on honing the big end of steel rods is in the SA Design Jenkins small block Chevy book I’d how he puts .002 shim stock the hens the rods round then removes it. The rod is now out of round but high rpm it stretch’s back round as I remember it’s when the rod does not have enough material at the parting line.

That sound like a better way than modifying the bearings.


Stan

[Larry Hill]

ATI balancer

[SSDiv6]

Originally Posted by Larry Hill

ATI balancer

You should have the harmonic balancer refreshed by ATI.
Although it balanced with the rotating assembly, it does not have anything to do with the operation. It has to more to do with harmonics dampening during the engine operation under load.

[Glenn Briglio]

Originally Posted by Ralph A Powell

A good read on honing the big end of steel rods is in the SA Design Jenkins small block Chevy book I’d how he puts .002 shim stock the hens the rods round then removes it. The rod is now out of round but high rpm it stretch’s back round as I remember it’s when the rod does not have enough material at the parting line.

This is when there weren't any good connecting rods available. Today's rods stay round even at higher rpm. That's if it's a good quality rod. Crower, Callies, etc

[Ralph A Powell]

If read the article he was talking about Carillo (not sure of spelling) rods they are shown in the book. At that time there were good Steel aftermarket rods available.

Originally Posted by Glenn Briglio

This is when there weren't any good connecting rods available. Today's rods stay round even at higher rpm. That's if it's a good quality rod. Crower, Callies, etc

[Larry Hill]

I got to speak with Glenn Briglio in person yesterday, what a wealth of knowledge, and he advised changing out the ARP rod bolts to a higher quality bolt next time. And then the sprinkles fell.