Thread: Identifying Piston Rings

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I’m building another small journal 327 and have come to a spot where I need some help.

I bought a set of Wiseco forged flat top pistons from a gent that couldn’t use them as his build had to go .060” over. They had the rings installed. I pulled them off for the obvious reasons, correct installation, end gap measurement etc.

As of yet I can’t determine the manufacturer. Hasting says not theirs due to location of the dot. Waiting to hear back from others.

It turned out these rings have moly faces on both top and second rings.

I bought these pistons many years ago and the gent I bought them from can’t recall what brand they were. He thought they would be sealed power, TRW, or Hastings.

As installed:

Top ring - dot on top side, inner bevel on top side, moly face laid between two thin strips of iron.

Second ring - no dot, inter bevel installed on top, moly is not inlaid between two strips of iron. There is iron on the face on the same edge as the bevel then moly on the rest of the face.

And most interesting, the second ring has more tension than the top ring???

Any insight would be appreciated

Thanks

Pistons are Wiseco forged flat tops.

Ring pack is 1/16”, 1/16”, 3/16”

The rings are unique to me as follows

Ring installed in top, I’m not going to call it the top ring as I don’t know for certain if it was installed correctly, was installed with an inner bevel up, a dot installed up, and it has a moly face sandwiched between a thin layer of iron at the top and bottom of the face.

Ring installed in second has no dot. Inner bevel was installed up. The moly face starts after a thin ring of iron and extends to the bottom of the ring face.

This is a zoomed in picture of the moly faces as installed on the piston

I’m showing the ring faces.

Both rings have an inner bevel as installed upwards in both lands.

Inner bevel is the same as M, PL and HC

Ring surfaces appear to be flat and the moly is shown in the picture.Moly is much wider than any of the rings you have shown. Again, top ring has moly sandwiched between two fine strips of iron. Second ring is almost full moly faced below a thin strip of iron

Picture of oil ring if that helps to determine manufacturer.

Face of top ring looks a lot like this old TRW ad