The following Stock/Super Stock horsepower changes were released July 10, 2012 produced by the Automatic Horsepower Factoring System (AHFS). This is the first of two scheduled horsepower adjustments for this year. All changes are effective July 10, 2012. It should be noted that these changes include only results produced by the AHFS, and do not include written letters or requests. Those changes are listed separately.

        The AHFS is a program based on actual run data compiled from all available runs at NHRA events. The data-based format provides the ability to calculate average performances for any class and/or engine combination in Stock and Super Stock. The trigger point for the system is 1.00-second or more under the respective index, and must be produced on two different occasions. Engine-combination averages and class averages are then computed and analyzed to determine if a change is warranted. The amount of change is calculated on a stepped percentage basis. Where applicable, adjustments will be effective for the specific car model or body style being evaluated. An automatic adjustment is instituted outside the two-time a year process when a 1.20 and under run is recorded during any NHRA event.

        Any comments, thoughts, or requests must be sent in writing to: National Hot Rod Association; Technical Department; attn: AHFS; P.O. Box 5555, Glendora, CA 91740; or e-mail, AHFS@nhra.com or bbachelder@nhra.com.

                              Stock Horsepower Changes

Complete for 1^st half rating period of 2012

Engine                 OEM         NHRA       New

Make          CID     HP            HP           HP           Years Affected

Mopar          345      305           411          421          09-10 Drag Pak

Mopar          360      275           303          310          09-10 Drag Pak

Mopar          370      385-390    390          399          09-10 Drag Pak M/T

Ford            330      425           491          498          2008 Cobra Jet

Ford            428      375           397          406          2010 Cobra Jet

                        Super Stock Horsepower Changes

Complete for 1^st half rating period of 2012

Engine                 OEM          NHRA     

Make          CID     HP            HP           New HP  Years Affected

Cadi            350      170           192          195          78-79 GT

Cadi            350      180           223          229          1977 GT

Chev           305      215           251          255          1985 GT

Chev           305      220           235          238          1989 GT

Chev           346      350           305          309          03-04 GT

Chev           350      247           283          287          1991 GT

Chev           350      260           275          279          94-97 GT

Ford            330      425           435          445          2008 Cobra Jet

Ford            330      510           575          588          2012 Cobra Jet