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Cam Timing

Find Top Dead Center 

Crankshaft T-Mars on

 

Mark on intake cam

Mark on exhaust cam

Gradskiva 0 grader.jpg (45938 byte)

Degree wheel 0 degrees

Measure clock top dead.jpg (58492 byte)

Dial indicator in sparkplug hole

 

Intake Cam
Measure clock cam.jpg (63329 byte)

Dial indicator on valve lifter

 

Gradskiva 10 grader.jpg (44999 byte)

Degree wheel 10 degrees

 

Gradskiva 44 grader.jpg (42202 byte)

Degree wheel 44 degrees

 

Cam Timing

(Adjust Lobe center)

To get the best result out of your  Turbo system you need to adjust the cams

especially if you have a thicker head gasket or cylinder spacer

 

Find Top Dead Center

(TDC)

 

First find the T on the right side of the crankshaft then you can see the marks on the camshafts 

if you can't see the marks on the camshafts turn the crank one more lap

 

Now you have to find the exact  TDC, to get the beast result.

You need a dial indicator that you put in the sparkplug hole at cylinder 1 or 4.

Then you need a degree wheel, mount it on the left side of the crankshaft.

Make an arrow that points to 0 (TDC) on the degree wheel. Then set the dial indicator to 0

Turn the engine forward until the dial indicator reads 0.1 mm, note the degree on the degree wheel.

Then turn the engine backwards until the dial indicator reads 0.1 mm again, note the degree on the degree wheel.

In the middle of  this tow degrees you will have the exact TDC.

Turn the engine forward to the degree that's was in the middle.

If you have another degree than 0 (TDC) adjust the arrow to 0 (TDC)

Now you have the exact Top dead center (TDC)

 

Intake Cam


Now place the dial indicator on the valve lifters for cylinder 1 or 4:

Start with the intake cam. After you have placed the dial indicator on the valve lifter

make sure that the dial indicator is set to 0 and that the arrow is pointing on 0 (TDC).

Turn the engine forward until the dial indicator indicates that the valve has opened 1.mm.

Note the degree wheel (ex 10 degrees before top dead center)

Start turning the engine forward again until the dial indicator shows 1.mm.

Now it is 1.mm before the valve is closed.

Not the degree wheel (ex 44 degrees after bottom dead center)

Now the intake cam is finished

 

Calculate lobe center

(180+44-10)/2 = 107

The lobe center for the intake cam in this example is 107 degrees

 

Exhaust cam

The procedure for the exhaust cam is the same but you will get the

highest number first

(ex 41 degree before bottom dead center and 11 degrees after top dead center)

(180+41-11)/2 = 105

The lobe center for the exhaust cam in this example is 105 degrees

 

Here is a degree wheel, Save picture and print it fore best result

Gradskiva.jpg (232364 byte)

 

 

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