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Piston Ring Wear: is this Normal?

632 Views 16 Replies 6 Participants Last post by  eutu1960
I am refreshing my 383 sbc tpi with 54000 miles on her she has been getting low on power, I dissembled the engine
and the top rings all have the same wear witch seems excessive to me, the rings were ductile iron and the pistons were Hypereutectic,
is this normal. Thanks for opinions. Also 2 of the rings were broken.
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The worn side of the ring....is that the upper side or the downward side??

How does the piston ring land look, on that side was against the worn ring side??
How does ring groove width compare to the ring thickness?

Engine run without an air cleaner??

Engine compression ratio and camshaft specs might be helpful info too.
 

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1st post says "383 TPI" so I"m assuming iron heads??
At 10.42:1 compression with relatively short cam and restricted intake it can lead to detonation.

what do the upper halves of the rod bearings look like??

Pistons just strike me as subjected to repeated levels of mild detonation....
What cylinders had broken rings??.
 
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