Camless engines, info and articles you know about |
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Camless engines, info and articles you know about |
Tom |
Dec 28 2010, 11:48 AM
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#21
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Advanced Member Group: Members Posts: 2,139 Joined: 21-August 05 From: Port Orchard, WA 98367 Member No.: 4,626 Region Association: None |
Anyone know about any interesting articles to share about camless engines?
Here is one link. http://autospeed.com/cms/title_Camless-Eng...10/article.html Having infinitely variable cam timing would open so much performance and economy it just boggles my little mind! And not having cam chains to worry about would be something positive also. Just imagine a 2 liter type 4 with heads that would essentially have dual overhead camshafts with infinitely variable valve timing. WOW!! Tom |
RJMII |
Dec 28 2010, 05:40 PM
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#22
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Jim McIntosh Group: Members Posts: 3,125 Joined: 11-September 07 From: Sandy, Utah Member No.: 8,112 Region Association: None |
They rotate to seat better. When we switch valves in a head ina car we spin them on purpose with valve lapping compound to assure that the seat shape and the valve shape are identical and provide a really good seal. Round is easier to assure the seal because of the ability to spin them in this procedure.
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jd74914 |
Dec 28 2010, 09:42 PM
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#23
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Its alive Group: Members Posts: 4,780 Joined: 16-February 04 From: CT Member No.: 1,659 Region Association: North East States |
They rotate to seat better. When we switch valves in a head ina car we spin them on purpose with valve lapping compound to assure that the seat shape and the valve shape are identical and provide a really good seal. Round is easier to assure the seal because of the ability to spin them in this procedure. I understand that lapping is used to match the valve/port together in order to promote good sealing. You do this whenever you assemble an industrial valve or, like you said, head. The part I don't understand is the necessity of valve rotation while the motor is running. At that point there is no guarantee of even surfacing, and any crap that gets on the seat can randomly scratch it, messing up the sealing surface. |
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