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