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The Factory early S cam has closer lobe centers than the Mod-S cam. By speading the lobe centers widen the power band.
The lobes we use also have more valve lift. This increases cylinder filling without having to add a lot of duration. This cam always gains both in torque and HP.
I have also been grinding a lot Solex cams on 102 lobe centers and have been getting good feedback on those as well.
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John Dougherty
Dougherty Racing Cams
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