Thread: i.d. a cam?????

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I just pulled a cam, on the back end it has ch2640, and between the back lobes there are three colors. from the back to front they are grn yel and wht Does anyone know what this cam might be? brand or size?.. thanks....

If you don't get an answer, use your dial caliper to measure the major and minor diameters of an intake and an exhaust lobe. Let's say that the major diameter is 1.272" and the minor diameter is 1.000". The difference would be 0.272". Now, if you multiply that times the rocker arm ratio of 1.73, you will have the lift for that lobe.

Anything less than 0.500" lift will be an OEM cam or a very small aftermarket cam that would be highly suitable for a daily driver-type motor.

Originally Posted by triple d

I just pulled a cam, on the back end it has ch2640, and between the back lobes there are three colors. from the back to front they are grn yel and wht Does anyone know what this cam might be? brand or size?.. thanks....

Try calling Chet Herbert cams and ask them about the part number.

Paul