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12-13-2011, 10:49 PM | #1 |
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Join Date: May 2010
Location: Las Vegas, NV
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Math for valve to head clearance?
Offy heads with valve pockets .425" deep, compressed copper gasket .062" and net lift .361"; the math says I should have valve to head clearance of .126". When I clay I get .090". Have I left something out in my calculations? My valve pocket depth varies; should it be uniform all around or is the pocket cut on an angle? When I clayed I did so at the .425 depth.
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12-13-2011, 11:46 PM | #2 |
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Location: Everett, WA
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Re: Math for valve to head clearance?
Your numbers imply that the top of the valve rises .397" above the surface of the block. Is the top surface of the valve above the block surface when closed?
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12-14-2011, 12:17 AM | #3 |
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Re: Math for valve to head clearance?
Bill, the top section of the valve on the seat I measured does sit above the deck; that explains it! Thanks for responding, Bob
Last edited by BobM; 12-14-2011 at 12:22 AM. |
12-14-2011, 07:26 AM | #4 |
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Location: Fitzgerald, Georgia
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Re: Math for valve to head clearance?
Bob, you told me last week that my email on this subject, were I explained the valve top, above deck dimension, has to be considered, cleared up your math problem and you were now within .008 of an inch??
Has something happened to change your readings? |
12-14-2011, 03:14 PM | #5 |
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Re: Math for valve to head clearance?
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