Hemi rod bearing issue

A fuel motor rod bearings wearing on the edges with plenty of Babbitt in the center
It’s the upper bearing it’s a hemi we just found a clutch problem it wasn’t fully engaging
And rpming pretty quick not to sure if this would cause the problem or not thanks for any help

 

Is it a new crank. I've seen where they didn't relief the crank radius wide enough or with the proper radius. Had a repair once do that after it came back

 

I’m not sure about the crank I think it was used and probably cut I’ll have to check

 

I forgot to mention it’s all 8 of the top rod bearings and the main guy and tuner has been in top alcohol since the 80s starting with blowers then moving into A fuel a

 

The crank is new only a hand full of runs on it

 

What type of oil and pressure you are running

 

Which bearing are you running? I know with Clevitte we run V series.The M's we ram with blower are too soft.

 

They are running the m’s

 

What bearing clearances and oil pressure/viscosity?

 

Lets wake this thread up, any updates OP?

How is the main thrust?
Can the clutch chatter when not engaging fully, violently shaking the crank back and forth?
If the crank journals are straight and the fillet radius is not too big, could the wear be an indication of the pin end of the rods rocking front to back, pinching the bearings?
Tire shake?

Perhaps piston guiding the rods isn't as crazy idea as I thought.

 

Put V’s in and check. I tried M’s once with similar result. Now only use an M on the thrust.

 

Running the M's is your problem I am pretty sure. I have cpl dozen sets of M's and we still had to buy the V's because M's will not live in A/fuel

 

Narrow your bearings