The following Stock/Super Stock horsepower changes were released July 8, 2014 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 8, 2014. 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, http://www.nhraracer.com/ahfs.asp.

                           Stock Horsepower Changes

Complete for 1st half rating period of 2014

Engine                   OEM          NHRA      New

Make          CID     HP            HP           HP           Years Affected

Chev           265      200           217          222          94-96 Caprice

Chev           350      165           195          198          1986 Truck

Chev           427      425           445          456          12-13 COPO

Chev           427      430           444          455          2014 COPO

Mopar          273      180           162          166          65-67 Belvedere

Ford            281      235           267          271          2010 Cobra Jet

Ford            302      350           369          378          2013 Cobra Jet

Ford            302      350           350          358          2014 Cobra Jet

Ford            330      450           504          516          2012 Cobra Jet

Ford            427      425           415          421          66-67 Fairlane

Pont            400      325           330          338          1967 Firebird

Pont            400      330           340          345          1969 Firebird

Super Stock Horsepower Changes

Complete for 1st half rating period of 2014

Engine                   OEM          NHRA     

Make          CID     HP            HP           New HP  Years Affected

AMC            390      340           417          423          1969  AMX

GM              265      200           211          214          94-96 GT FWD

GM              305      145-155    256          260          82-84 GT FWD

GM              305      215           252          256          85-86 Camaro

GM              350      247-250    287          294          90-91 GT FWD

Ford            330      435           441          451          2010 Cobra Jet

Ford            330      450           503          515          2012 Cobra Jet

Ford            428      335           360          369          1969 Mustang

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