Above are three cams, Can you guess which one has the largest Duration and Lift
The point we are trying to make is that all three cams
have the same lift (L)
and duration
(D).
As you can see they are
obviously not even close to being the same.
If cam "B" is
the correct design then cam "A" would
have more Low End but produce less H.P.
and be more likely to float the
valves.
Cam "C" would have lots of Top End but would produce a
very narrow power band and be very
hard on the valve train since the
valves would be opening so fast,
As you can see it is nearly impossible to compare or evaluate cams by the "numbers" only.
So when it comes time to pick a cam
it is wise to get advice from some one who has tried a verity of cams in
motor's similar to the one you will installed it in.
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