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2015 Mid Year Stock, Super Stock Horsepower Adjustments Announced

The following Stock/Super Stock horsepower changes were released July 14, 2015 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 14, 2015. 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 2015

 

 

Engine                 OEM          NHRA      New

Make          CID     HP            HP           HP           Years Affected

 

Buick           350      195           264          268          1972 Skylark

 

Cadi            350      180           186          189          1977 Deville

 

GM              231      200           200          203          95-02 Cam/Fire

 

GM              305      185-190    241          245          1987 Cam/Fire

 

GM              350      275-285    340          345          93-98 Cam/Fire

 

Chev           350      295-300    286          290          67-70 Cam/Nova

 

Chev           350      530           555          562          14-15 COPO

 

GM              350      245           268          272          90-92 Cam/Fire

 

Chev           396      325           325          330          67-69 Camaro

 

Chev           396      390           399          404          13-15 COPO

 

Ford            140      100           130          133          1980 Mustang

 

Ford            302      122           129          132          1975 Maverick

 

Ford            302      139           159          163          1978 Mustang

 

Ford            302      500           549          562          2013 Cobra Jet

 

Ford            302      525           550          563          2014 Cobra Jet

 

Ford            330      435           490          497          2010 Cobra Jet

 

Ford            330      425           512          519          2008 Cobra Jet

 

Ford            330      450           528          535          2012 Cobra Jet

 

 

 

Super Stock Horsepower Changes

Complete for 1st half rating period of 2015

 

 

Engine                 OEM         NHRA     

Make          CID     HP            HP           New HP  Years Affected

 

Cadi            350      170           200          203          1978 SS/GT

 

Chev           265      180           197          202          1955 150

 

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

 

Dodge         426      460           460          466          2015 Drag Pak

 

Ford            281      510           510          517          2008 Mustang

 

Ford            330      425           482          493          2008 Cobra Jet

 

Ford            330      450           527          539          2012 Cobra Jet

 

Ford            330      510           602          610          2012 Cobra Jet

 







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