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06-29-2009 | 01:15 AM

#23

DarZeelon

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From: Rosh-HaAyin, ISRAEL

RE: Ring installation

Quote:

ORIGINAL: captinjohn

The piston ring may have lost its tension from lean run. Put in a new ring from Frank Bowman and it will sing again!

John,

This may be true, but the ring's tension ('springing' out against the cylinder) is a very small contributor to sealing and thus to engine power.

The 'large' force that contributes to the ring seal, is high-pressure gas from compression/combustion, getting into the ring's groove and pushing the ring 'from behind', against the cylinder wall.

See the drawing. It is for a Dykes ring, but a normal ring seals similarly.

Low ring tension will, however, reduce sealing during cranking, making starting a more tedious endeavor...

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