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How to figure a camshaft's lift

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This is a fairly simple thing to do.

Dial calapiers and a basic calculator and paper and pencil is what is needed.

First is to measure the cans base circle.
The base circle will be the smallest measurement.
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This was 1.181 on this cam

Next is the Toe measurment is next and will be the largest.
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1.417 here.

Now for the math.

Toe - Base = Cam lift

1.417 - 1.181 = .236

Now gross lift, is the distance the valve moves off the valve seat.

1.7:1 is the rocker ratio
I have also read that the rocker ratio is 1.73:1

Now take the cam lift and multiply it by the rocker ratio to figure gross lift of the cam.

1.7 x .236 =.4012

Now since the 4g63 is a "metric engine" and most all specs are in mm.
To convert the gross lift to mm

25.4 x .4012 = 10.19mm
 
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