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porsche 911sc webcam 964 regrind
Years ago, I sent my stock 911SC cams out to web cam for a regrind to a grind # 40 (porsche 911 C2/C4 3.6L) which I assume means a 964 spec.
In the timing spec they sent me, it stated to set them at 1.7-1.9 mm. As I am in the course of another rebuild using the same cams, I called them again to verify these settings were still correct. They told me now to use 1.25 mm with a lash of .1 mm. I used to run these cams for about 5 years at the 1.75 setting with no problem. Can anyone provide some clarification here as to what the real setting should be? I hae installed new pistons from an 83 SC which are 9.3:1 CR in lieu of the stock pistons at 8.5:1 thanx in advance.
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Erk  PCA Member restored 79 911SC Euro green, mean and ready to rock |
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01-19-2007, 10:25 AM
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all I know is stock for an sc with 9.3:1 CR is 1.4-1.7 with .01mm lash
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Ben 89 944,85.5 944 914-6 2.4s GT tribute. 914-6werkshop.com |
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01-19-2007, 11:43 AM
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I have seen that also in the spec books. Not sure what the consequences of running with a much higher value of say 1.7 or if it really makes that much difference
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Erk PCA Member restored 79 911SC Euro green, mean and ready to rock |
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01-19-2007, 11:49 AM
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Join Date: Apr 2006
Location: Newcastle, WA
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I have 964 regrinds by John Dougherty and was quoted 1.26mm. I thought that is what Wayne's book says also in the tech specs section.
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James 1969 911E Slate Grey 1981 911SC Wine Red 1997 911C4S Ocean Blue |
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01-19-2007, 05:15 PM
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Well
that's whay I did today, 1.25 mm so I hope it all works when I fire it up in the spring. thanx
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Erk PCA Member restored 79 911SC Euro green, mean and ready to rock |
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01-19-2007, 08:47 PM
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