Does somebody have a set of loose Model A compression rings they could measure the ring groove depth portion of the ring, Not the width, but the depth. Like I have measured in the pic attached. Trying to figure out if I can mix and match from a Model A ring set and will work for my custom project (same bore size and same groove width -but no suppliers catalog lists the ring groove depth portion of the ring for an A).
I found this here... 1928, 1929, 1930 & 1931 Ford Model A & AA Piston Piston - Macs Auto Parts https://www.macsautoparts.com › piston All piston ring sets are a US made Grant or Hastings brand 3 ring type. The gap of the rings must not line up; keep them about 1/4 turn from each other. Piston Ring Specifications: Ring diameter: Same as piston - 3.875" stock Ring groove depth: 7/32" Ring groove width: Upper two - 1/8", Lower - 5/32" Ring taper: .001"- narrower at the top than the bottom Ring clearance in groove: .001" to .002" Ring end gap: Top .012" to .015"; Middle .010" to .012"; Lower .008" to .010" Sent from my SM-S320VL using Tapatalk
I don't think that mac's figure is correct since they are now owned by eckler's. I've never seen a ring that was .2187" deep on a Model A.....
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