Cams may or may not have the same timing as stock. As a general rule only,
street cams tend to run at 110 deg ATDC, race cams tend to run from 103 Deg
ATDC to 100 deg ATDC.
The timing marks are dimples on the timing sprockets, not the cam. the
notch in the cam is for a key that locks the cam pulley to the cam. If you
have an adjustable cam pulley, then you must use a protractor and dial gauge
to set the timing to the right setting as specified for the cam you are
using. If you have a new cam, the specs will be with th cam. If you have
an old cam, the specs might be in the Vizard book, or you can measure the
lobe center angle and set the cam based on that. Most cams are symetrical,
so if you measure the total angle between intake and exhaust and divide by
two, that will be the timing for the cam.
brian
At 10:24 PM 2/2/98 -0500, you wrote:
>Will--
>
>I have ordered a Kent road cam for my '67 Sprite. The kit has a timing disc
>with it. I believe that if you change the grind of the cam, the cam must be
>postioned differently relative to the crankshaft, than the stock cam. I would
>get intouch with the Kent company to see if there is a timing disc for that
>cam. Perhaps others have more informed input here--I will be reading to see.
>
>------David
> '67 Sprite MKIV, Vicky
>
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