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Old 09-20-2010, 05:30 PM   #16 (permalink)
some_other_dave
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Quote:
Originally Posted by vtec-e View Post
How about this for reducing valve friction!
Welcome to Coates International Ltd.
That's the rotary valve setup I was mentioning earlier. They've been around for perilously near 20 years that I know of, and have been "just about to enter production" for that whole time.

Last I heard (many years ago) they had significant sealing problems.

-soD
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