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Old 10-30-2008, 12:19 PM
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small base circle cam

what is the diffrence between the small base circle cam and a standard cam? is there power diffrences or what?

Thanks,

Mike

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Old 10-30-2008, 12:33 PM
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Mostly a small base circle cam is designed for more clearance. Stroker cranks can hit standard cams so they make small base circle cams to prevent contact.
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Old 10-31-2008, 07:26 AM
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Base circle of cams

Whenever valve lift increase, the size of the lobes increase. Well, they can only get so big before the thing won't even fit through the cam journals in the block anymore! Cam grinders then compensate by reducing the actual axle core to allow for taller lobes. The cam is no longer as "fat". This is very common on roller cams and that is why they grind them on steel billets - it eliminates or greatly reduces core twist. Hope this was clear!
Pat
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Old 10-31-2008, 07:49 AM
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In Ford small blocks there is no issue of crank throw, we use them with roller cams because anything over .600 lift and the lifters start coming too far out of their bores. Small base circle cams allow the lifter to sit deeper into the bores
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