Pelican Parts Forums - 911sc 1977 2.7cis Cam Timing Specs

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911s 1977 2.7cis Cam Timing Specs

HI just wondering what are the specs for the valve timing specs on a 1977 911S 2.7CIS

with stock cams it looks like it should be .4-.54; cams should be
911.105.144.00
911.105.143.00

The CIS cams for the 2.7 911S opened the intake valve 1.0mm at 6 degrees after TDC.
Thus the spec at TDC is 0.73mm or 0.029". Twenty nine thousandths.
Donnie's numbers are for a stock 2.7 911 which opens the intake valve 1.0mm at 1 degree after TDC.
Although the 911 cam opens 5 degrees sooner than the 911s cam it closes 15 degrees sooner at 35 degrees after BDC as compared to the 911S cam which closes at 50 degrees after BDC.
So the 911 cam has a 214 degrees of intake duration, compared to the 911S cam with a 224 degrees of intake duration.

thanks for the edit, I wondered what I read wrong.