One of my friends corrected me about the statement below. One cam degree is
equal to two crank degrees. So one tooth on the 48-tooth cam gear is
equivalent of 15 crank degrees. Or as he said "A tooth is a tooth," whether
it's on the 24-tooth crank gear or the 48-tooth cam gear.
> The cam spec is max lift at 112 deg. I count 48 teeth on the
> cam gear. This
> gives 7.5 cam degrees or 3.75 crank degrees per tooth. So, I
> don't think I
> can get any closer without an offset key or one of those
> dial-in gears.
>
There was also a question about the asymmetrical ramps on the cam causing an
error in using the intake centerline method. The literature on my cam says
that the intake valve opens quickly and closes slowly. If you use the
centerline method to degree the cam, this would tend to make your
measurement retarded from the actual max valve lift location. You can draw a
picture of a cam profile like this to see the effect.
- Hugh
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