|
Registered
Join Date: Jun 2004
Location: Rio Rancho, New Mexico
Posts: 1,325
|
--------------------------------------------------------------------------------
"I just purchased a 84 911 Carrera with modified 3.2L. This engine has Web Cams grind 20/21 and the spec says Intake opens 6deg before TDC it further states 'Valve timing is to be done with zero valve lash @.050 inches of valve lift', does this mean that at 6deg before TDC the intake valve (cyl #1) should be opened .050" if the valve lash has been set to 0?"
---------------------------------------------------------------------------------
Answer: Yes
American cam makers differ from European makers in that American cams are specified at 0.050" initial lift, whereas European cams, (Porsche), are specified at 1.0mm lift (0.03937").
Using the opening degree numbers and closing numbers for the intake, just check the cam with a degree wheel.
Search "degree wheel" for a printable usable wheel.
__________________
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
|