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2016 Mid Year Stock, Super Stock Horsepower Adjustments Announced

The following Stock/Super Stock horsepower changes were released June 28, 2016 produced by the Automatic Horsepower Factoring System (AHFS). This is the first of two scheduled horsepower adjustments for this year. All changes are effective June 28, 2016. 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.

 

A minor change was made this year to the method of calculating runs made at altitude tracks. In the past these runs were converted back to sea level as a part of the calculation. After input from racers and an internal review it was determined that the prior method was not as linear or consistent as the new method of just subtracting the run from the altitude corrected index.

Because the process of making Stock and Super Stock horsepower adjustments involves collecting and performing calculations on large amounts of data, it is possible to make errors. From the completion of the tech. card, to the entry of data into the timing system, to the calculations of the final data itself, errors can be made. We work very hard to minimize those errors, but they still sometimes occur. Usually when a mistake has been made one of our racers quickly points it out to us and we make the correction. Please feel free to contact Pat Cvengros via email at: pcvengros@nhra.com. regarding any questions or concerns about  horsepower adjustments.

 

       

 

                            Stock Horsepower Changes

Complete for 1st half rating period of 2016

 

 

 

Engine                 OEM         NHRA       New

Make          CID     HP            HP           HP           Years Affected

 

AMC            258      114           148          150          1977 Pacer

 

Chev           327      275           274          278          66-68 Nova

 

Chev           350      350           350          355          13-15 COPO

 

Chev           396      390           414          420          13-15 COPO

 

Chev           427      425           456          467          12-13 COPO

 

Chev           427      450           450          461          14-15 COPO

 

Chry            146      180           204          209          2004 PT Cruiser

 

Mopar          426      425           415          421          1964 Fury

 

Dodge         512      450           511          518          2011 Drag Pak

 

Ford            330      425           497          504          2010 Cobra Jet

 

Ford            330      450           542          549          2012 Cobra Jet

 

 

 

 

Super Stock Horsepower Changes

Complete for 1st half rating period of 2016

 

 

Engine                 OEM         NHRA     

Make          CID     HP            HP           New HP  Years Affected

 

Chev           350      530           530          542          14-15 COPO

 

GM              350      245           275          279          90-92 SS/GT FWD

 

Chev           350      260           283          287          94-97 SS/GT RWD

 

Dodge         512      450           467          473          2011 Drag Pak

 

Ford            302      525           544          557          2014 Cobra Jet

 

Ford            330      425           505          517          2008 Cobra Jet

 

Ford            330      435           477          488          2010 Cobra Jet

 

Ford            351      285           329          334          1971 SS/GT FWD

 

Ford            428      355           350          355          1969 SS/GT RWD








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