Comments on: U-Flex if you want to http://www.ret-monitor.com/articles/1096/u-flex-if-you-want-to/ Specific mission-critical info for professionals Fri, 18 May 2012 08:48:42 +0000 http://wordpress.org/?v=2.7.1 hourly 1 By: Frank http://www.ret-monitor.com/articles/1096/u-flex-if-you-want-to/comment-page-1/#comment-4572 Frank Sat, 23 Oct 2010 18:07:04 +0000 http://www.ret-monitor.com/articles/1096/u-flex-if-you-want-to/#comment-4572 My error, both a compression ring and a U-flex ring is seen in the cover picture of the Toyota F1 engine. Frank My error, both a compression ring and a U-flex ring is seen in the cover picture of the Toyota F1 engine.

Frank

]]> By: Frank http://www.ret-monitor.com/articles/1096/u-flex-if-you-want-to/comment-page-1/#comment-4571 Frank Sat, 23 Oct 2010 17:59:40 +0000 http://www.ret-monitor.com/articles/1096/u-flex-if-you-want-to/#comment-4571 Good article John. The cover picture of the most recent RACE ENGINE technology, issue 49, shows a cutaway of the Toyoto F1 engine with no more piston rings than one U flex ring with the top section modified to eliminate the slots that are normally in both the top and in the bottom section of a normal U-flex ring. The slots seen in the lower section identify the ring as a U-flex ring plus the piston supplier in this engine, Mahle, is known to offer U-flex rings. However it is not common to use a U-flex ring as the only piston ring as it appears that Toyota has done. Good article John.

The cover picture of the most recent RACE ENGINE technology, issue 49, shows a cutaway of the Toyoto F1 engine with no more piston rings than one U flex ring with the top section modified to eliminate the slots that are normally in both the top and in the bottom section of a normal U-flex ring.

The slots seen in the lower section identify the ring as a U-flex ring plus the piston supplier in this engine, Mahle, is known to offer U-flex rings. However it is not common to use a U-flex ring as the only piston ring as it appears that Toyota has done.

]]> By: Saltfever http://www.ret-monitor.com/articles/1096/u-flex-if-you-want-to/comment-page-1/#comment-3656 Saltfever Tue, 06 Jul 2010 07:42:26 +0000 http://www.ret-monitor.com/articles/1096/u-flex-if-you-want-to/#comment-3656 Denis what is OPSPR? Denis what is OPSPR?

]]> By: Denis Muller http://www.ret-monitor.com/articles/1096/u-flex-if-you-want-to/comment-page-1/#comment-3633 Denis Muller Sat, 03 Jul 2010 06:47:26 +0000 http://www.ret-monitor.com/articles/1096/u-flex-if-you-want-to/#comment-3633 Excellent article. Just one point: last chapter. Wear could be high but the OPSOR has the capacity to absorb it as the reduction of radial wall thickness can amount 10 times that of a regular OCR before losing performances. The OPSOR free standing Ø is a full 2 mm bigger than the bore Ø ! So the wear is not a typical concern of this type of ring and special coating are also not necessary as well. Kind regards Denis Muller Excellent article.
Just one point: last chapter. Wear could be high but the OPSOR has the capacity to absorb it as the reduction of radial wall thickness can amount 10 times that of a regular OCR before losing performances. The OPSOR free standing Ø is a full 2 mm bigger than the bore Ø ! So the wear is not a typical concern of this type of ring and special coating are also not necessary as well.

Kind regards

Denis Muller

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