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Registered
Join Date: Jul 2008
Posts: 3
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GE80 Cams and Valve Springs
Hi there,
I am trying to find out what the recommended valve spring open pressure is for GE80 cams in a motor which spins to 7500 or maybe a bit higher on a rushed downchange. I have searched the archives, but can't find a specific reference. Does anyone know? Cheers, How. |
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08-20-2008, 04:38 PM
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3 restos WIP = psycho
Join Date: Feb 2005
Location: North of Exit 17
Posts: 7,665
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Not sure of the exact values, but I know that Henry, Steve Weiner and Camgrinder all have valves that are specifically designed for these applications.
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- 1965 911 - 1969 911S - 1980 911SC Targa - 1979 930 |
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08-21-2008, 10:28 AM
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Registered
Join Date: Feb 2004
Location: California
Posts: 926
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Generally speaking, 280-300 lbs on the intake, 260-280 lbs on the exhaust side will work to 7500 rpm. Titanium valves reduce the required open pressure.
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John Dougherty Dougherty Racing Cams |
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08-21-2008, 10:43 AM
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Registered
Join Date: Jul 2008
Posts: 3
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Thanks for that.
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08-21-2008, 03:15 PM
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