The relevance is that both Webly and diesels use rings to achieve the same task, ie building up pressure rapidly. One caveat for metal rings in both instances is that the bore must be perfectly round and not scored to achieve a perfect seal.Originally Posted by felix gunner
Not sure how relevant the very different set up in a diesel engine is?
But refer back to the opening post and the link there - my MKI with leather washer is reasonably powerful and certainly trumps my Senior with piston ring that doesn't seal...
Leather/synthetic seals are more forgiving in this respect as they adapt and swell to fill any imperfections in the cylinder.
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