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Between .010 and .020 at the lobe/lifter end will usually get you reasonably close on a mystery cam.
The variables/limits are noise/impact damage at the large end and "no start" at the low end of the common ranges. A cam designer will also take lifter diameter, lobe profile grinding capability and durability needs into account when making the choice.
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Survival Motorsports
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Engine Masters Challenge Entries
91 octane - single 4bbl - mufflers
2008 - 429 cid FE HR - 675HP
2007 - 429 cid FE MR - 659HP
2006 - 434 cid FE MR - 678HP
2005 - 505 cid FE MR - 752HP
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