camshaft timing??

[LBS]

I have -76 model 2.7 l engine with cam numbers 911/144 and 911/143. Can anyone tell me how many mm inlet valve opens in 360 deg? What about inlet opening degree? I haven't found anywhere exact mm or degrees for these cams.

[2.7RACER]

LBS,
Welcome to the board. Tradition is to post a pic of your car.
Answers:
The intake and exhaust both lift 10.5mm.
The intake opens at 6 degrees ATDC and closes @ 50 degrees ABDC.
The exhaust opens @ 24 degrees BBDC and closes @ 2 dgrees BTDC.
These figures are with a 0.1mm gap, with the valves open 1.0mm at spec.
A rather mild cam to suit smog and the CIS intake system.
A direct measurement of the cam lobes will be less than 10.5mm.
The rocker arms are approximately 1.5:1 at full lift.
Tell us about your '76.

[LBS]

i'll put later some pics and info about car. Thank you about these.

Can you say how much inlet should open when i rotate engine 360 deg from TDC when valves are closed?

[2.7RACER]

The intake and exhaust cycle takes 720 crankshaft degrees to complete.
Remember the crankshaft make 2 rotations for 1 camshaft rotation.
Beginning from Z1 TDC compression, both valves have been closed for over 100 crankshaft degrees.
At 24 crankshaft degrees before bottom dead center, the exhaust valve will open and remain open until the crankshaft reaches 2 degrees before top dead center at crossover.
The crankshaft will pass Z1 TDC at crossover and at 6 degrees after Z1 TDC the intake will be open 1.0mm.
The intake will be open for 224 degrees duration until the crankshaft reaches 50 degrees after bottom dead center.
At 50 degrees ABDC the intake will be open 1.0mm, on it's way to fully closing approximately 10 degrees later.
The specs for European cams are measured to begin at 1.0mm opening of the valve.
That is the valve began to open about 10 degrees before the number 6 degrees ATDC.
This is a standard method of specification for European cams.
It can be confusing when you first become aware of this.
The factory specification for timing the cam is 0.40mm to 0.54mm at overlap with 0.1mm valve clearance.
That is the intake valve began to open before the Z1 mark and at the Z1 mark with a 0.1mm clearance the valve should be open between 0.4mm and 0.54mm.
As you reach 6 degrees after the Z1 mark the valve should be open 1.0mm.
So you can see the intake valve has opened slightly at crossover (overlap) even before the 6 degree specification.
So, at Z1 TDC crossover (overlap), the intake is open say 0.47mm. in six more degrees it will open to 1.0mm
The intake duration of 224 degrees is is good to know when comparing various cams.
A Solex cam has an intake rating of 248 degrees and a "S" cam is rated at 268 degrees intake duration.
With Carbs either of these cams will increase to available HP of a 2.7 engine.