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Posted by Cliff on February 4, 2008, 5:11 am
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wrote:
>Who was the first person to mention Serdi in this newsgroup?
>
>Who was the first person in this newsgroup to say that grinding valve
>seats was obsolete?
Well, a quick check finds that a self-proclaimed expert AND the inventor
of the Serdi stuff say it's obsolete:
[
Looks like this is the future
...
CNC (Computer Numerical Control) machining of valve seats is by far
the most advanced and highest quality method available today. Mohr
Performance Machine is proud to be the first in the USA to install
this technology. The machine is known as the Newen Contour. To date,
only 5 NASCAR shops, including Earnhardt's and Evernham's, now have
such a machine.
...
The technology utilizes a single point cutter guided by computer to
machine the desired seat shape. The small contact area of this cutter
reduces tool deflection 300 times that of a conventional multi-angle
carbide cutter. This eliminates the poor concentricity and chatter
problems frequently encountered with multi-angle cutting systems.
...
The truth is, if the seat isn't round, the valve can not seal properly
and the engine will lose power. Serious shops cannot tolerate these
problems and therefore are forced to finish the seats with stones.
This is time consuming and difficult to control in terms of seat
depth, width, and diameter.
...
Pierre Harmond, the designer of the Contour, knows all to
well the problems associated with multi-angle carbide cutters. He
invented them for Serdi many years ago. He progressed forward and so
should we.
The Contour technology allows the customer complete freedom to specify
whatever seat shape he or she desires.
] - jon_banquer May 31 2004
http://www.newen.com/automotive/about.html
LOL ....
--
Cliff
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>
>Who was the first person in this newsgroup to say that grinding valve
>seats was obsolete?