|
|
|
|
| Author |
|
|
Registered
Join Date: Feb 2006
Posts: 2
|
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
Last edited by turboesp; 05-30-2006 at 04:39 AM.. |
||
05-30-2006, 03:42 AM
|
|
|
Registered
|
with stock cams it looks like it should be .4-.54; cams should be
911.105.144.00 911.105.143.00
__________________
Donnie Currently Porsche-less..... 
|
||
|
05-30-2006, 06:39 AM
|
|
|
Registered
Join Date: Jun 2004
Location: Rio Rancho, New Mexico
Posts: 1,325
|
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.
__________________
DOUG '76 911S 2.7, webers, solex cams, JE pistons, '74 exhaust, 23 & 28 torsion bars, 930 calipers & rotors, Hoosiers on 8's & 9's. '85 911 Carrera, stock, just painted, Orient Red Last edited by 2.7RACER; 05-30-2006 at 07:07 AM.. |
||
|
05-30-2006, 06:43 AM
|
|
|
Registered
|
thanks for the edit, I wondered what I read wrong.
__________________
Donnie Currently Porsche-less.....
|
||
|
05-30-2006, 03:38 PM
|
|
'74 Porsche 911 2.7
