Hi Todd,
For what its worth.
Long ago when rebuilding and old Ford Y block the 30 over pistons and rings
set I ordered had a 4 ring set-up similar to what you describe with one oil
ring below the pin. Engine ran fine, when I enquired about the set-up, no
one could say. Never seen a similar deal on a piston engine before or since.
Chris Harris...........NZed.
> Any chance someone here has dealt with 4-ring 4-stroke pistons?
> This would be two compression rings and two oil rings, one of the oil
> rings
> in the normal position(between the second ring and the wristpin), and one
> of
> the oil rings below the wrist pin(at the very bottom of the skirt).
> They are all one piece rings except for one of the oil rings which is a 2
> piece ring(consisting of an outer scraper and inner spiral wound expander
> spring).
> Todd
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