Horsepower Adjustments – From Competitor Requests

The NHRA Technical Department released Horsepower changes December 7, 2022 after review and evaluation of written requests from Lucas Oil Sportsman Series competitors. All changes are effective January 1, 2023. Only those requests received by November 15, 2022 were considered during this scheduled evaluation. Any requests received after November 15, 2022 will be reviewed during the next scheduled evaluation of 2023.

Letter review is part of NHRA's commitment to evaluating input from the Sportsman racing community and is an important element of NHRA's Automatic Horsepower Factoring System.  “No Change” combinations are listed so that competitors may see that requests were reviewed by the Technical Department, even though the request resulted in no change.

          Requests for horsepower changes or reviews can be made here www.nhraracer.com/ahfs.asp.  Requests for reviews must be received no later than November 14, 2023 to be included in the next scheduled horsepower and index review.

Stock Horsepower Changes

Engine                     OEM           NHRA       New

Make           CID      HP             HP            HP            Years Affected

Chev          327     250          241        237        1968

Chev          396     350          335        330        1969

Ford           289     210          191        188        1964

Ford           302     230          214        210        1968

Note: See class guide for specific details

Stock Horsepower No Changes

                                            OEM       NHRA

 

Make             CID          HP         HP             Years Affected

Chev             305            145        180            1978 Camaro

Chev             350            240        270            1989 Corvette

Chev             396            325        325            1968 Camaro

Chev             454            425        414            1971 Chevelle

Chev          454               425        430             1971 Chevelle

Chev             454            450        440            1970 Chevelle

Plym              272            180        159            1964 Valiant

Plym              273            235        201            1965 Valiant

Plym              426            425        425            1964 Belvedere

Plym              426            425        435            1968 Roadrunner

Plym              440            375        330            1967 GTX

Ford              227            260        234            2011 Mustang

Ford              289            225        207            1965 Mustang

Olds              455            365        350            1970 442

Pont              350            320        305            1968 Firebird

* = no such combination listed in the class guide.

 

 

 

Super Stock Horsepower Changes

                                        OEM        NHRA     New

 

Make                CID         HP          HP          HP             Years Affected

GM                 231       200       161       155         95-02

Chev              283       220       237       230         64-66

Chev              396       375       400       391         68-69

Mopar            318       155       229       225         78-80

Mopar            413       394       395       390         1962

Mopar            440       375       366       360         1969

Ford               302       150-225 215       212         87-92

Ford               302       350       345       340         2013

Ford               302       350       345       340         2014

Ford               302       325       292       285         2012

Ford               302       385       380       375         2016

Pont               455       300       322       314         1972

Note: See class guide for specific details

Super Stock Horsepower No Changes

                                        OEM      NHRA

 

Make             CID       HP        HP                       Years Affected

Chev              327       300       281                      1983 GT/RWD

Chev              327       300       293                      1966 GT/FWD

Chev              350       360       330                      1970 GT/RWD

Dodge            383       330       296                      1968 Dart

Dodge            383       335       300                      1968 Super Bee

Ford               289       220       220                      1964 GT/RWD

* = no such combination listed in the class guide.

Super Stock Index Changes

Class

SS/AX        9.60           9.70

SS/BX        10.65         10.75

SS/CX        10.90         11.00

SS/DX        9.05           9.15

* = no such combination listed in the class guide.

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