Piston Ring Dimentions

[DUNCAN]

What are the proper dimentions for the piston ring reliefs in the pistons and also the ideal piston ring dimention? Width and height?

I think that I measured .075 on the bottom ring (not oil ring) but I cannot get an accurate reading on the top.

Thanks

[John Merriman]

Brian, ring thickness is .062" top and .078" second. Jake's book says ring "side" clearance in the piston should be .0015"-.002" with a limit of .004". Standard back clearance is also listed as .020"-.025" which when added to ring width should give you std. groove depth.