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The way I've been doing the piston rings for the Howell V4 is I turned to .002 oversize and made sleeve and mandrel like on the JEH piston ring page. I made mandrel with cover and pin like shown in strictly IC article using specs from V4 Plans (.131 pin, .827 mandrel dia, etc I made the...

thanks, what got me wondering about it was where the drawing says the 3 ring grooves are .041" wide x .043 deep. Figured all the ring grooves would be all starting at the same diameter b/c of their equal depth

I was wondering if someone could help me with the piston drawing. I just want to verify I'm understanding this correctly. It shows .872" dia (top land only) on the print. It shows .873" dia at the bottom of piston. Does this mean after the first o-ring groove the diameter is .873"?