Cams Rating System

Performance Rank Explained - The higher the number, the more performance potential. The 'L' nomenclature was coined to allow for ranking between existing higher Performance Rank numbers. (Using a letter sounded better than saying '1/2'.) The 'L' is a design based on the root number, with emphasis on Low End power. Performance Rank applies to lobe design, not the number of cylinders or applications.

Rank 1      1300 Normal
Rank 2      1600 Normal
Rank 3      USA Spica
Rank 4      1600 Carb'd
Rank 5      2000 Euro, (105480320001)
Rank 6      1300 Veloce
Rank 7      1600 Veloce
Rank 7L     Similar to Rank 7 w/emphasis on LOW END power
Rank 8      Extension of 1600 Veloce philosophy, for larger engines
Rank 8L     Similar to Rank 8 w/emphasis on LOW END power
Rank 9      No longer used (Was a specific Autodelta cam)
Rank 10     Equivalent to an old (1960's) 10.5 Autodelta grind.
Rank 1OL    Similar to Rank 10 w/emphasis on LOW END power
Rank 11     No longer used (Was a specific Autodelta cam)
Rank 12     No longer used (Was a specific Autodelta cam)
Rank 13     Race cams for larger engines, power to 8000*
Rank 13L    Race cams for smaller engines, power to 7600* 

* It's difficult to put racing cams into a nice, neat pigeonhole. Power bands, performance characteristics, and max power are dependent on the total package the user has brought together; these are general max redline. "Yours may vary."

     - Tom Sahines

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