The NHRA Technical Department released Horsepower changes December 19, 2012 after review and evaluation of written requests from Lucas Oil Sportsman Series competitors. All changes are effective January 1, 2013. Only those requests received by November 12, 2012 were considered during this scheduled evaluation. Any requests received after November 12, 2012 will be reviewed during the next scheduled evaluation of 2013.
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 May 31, 2013 to be included in the next scheduled horsepower and index review.
Stock Horsepower Changes
OEM NHRA New
Make CID HP HP HP Years Affected
AMC 258 114 150 148 1977 Gremlin
Buick 252 125 170 166 83-84 Regal
Chev 173 112-115 135 130 80-84 Citation
GM 231 200 203 200 95-02 Camaro
Chev 262 155 186 182 1986 Truck
Chev 265 180 205 200 1955 Chev
Chev 305 175-190 253 248 83-87 Malibu
Chev 305 165-175 249 244 85-87 Caprice
Chev 327 275 270 265 66-68 Malibu
Mopar 426 365 296 291 1964 Belvedere
Mopar 440 390 411 404 1970 Challenger
Olds 455 390 362 356 1968 Hurst
Stock Horsepower No Changes
OEM NHRA
Make CID HP HP Years Affected
Buick 455 360 385 1970
Chev 262 170 187 1996 S-10
Chev 283 220 223 64-66 Nova
Chev 305 145-180 244 80-84 Camaro
Chev 305 150-180 230 80-83 Malibu
Chev 305 155-190 263 83-87 Camaro
Chev 327 365 315 64-65 Corvette
Chev 327 275 274 1966 Nova
Chev 350 300 290 69-70 Chevelle
Chev 350 165-190 275 78-80 Camaro
Chev 350 165 275 1976 Camaro
Chev 376 430 430 2008 Corvette
Chev 396 325 320 66-69 Chevelle
Chev 402 375 395 1970 Camaro
Chev 427 390 371 68-69 Corvette
Chev 454 425 420 1971 Chevelle
Chev 454 450 430 1970 Chevelle
Chev 350 145-265 230 71-76 ???
Mopar 273 180 166 66-67 Belvedere
Mopar 318 120-230 185 70-86 Dart
Mopar 318 230 182 1969 Dart
Mopar 340 240 285 72-73 Duster
Mopar 426 415 415 63-64 Savoy
Mopar 440 385 405 1971 Challenger
Ford 200 87-96 140 77-80 Mustangs
Ford 281 300 320 99-03 Mustang
Ford 302 150-225 215 87-89 Mustang
Ford 428 335 383 68-69 Fairlane
Ford 428 335 380 68-70 Mustang
Olds 238 115 115 93-94 Acheiva
Pont 364 400 391 05-06 GTO
Pont 389 313-348 275 60-63 Full size
Pont 400 330 330 1968 Firebird
Super Stock Horsepower Changes
OEM NHRA New
Make CID HP HP HP Years Affected
Chev 283 220 224 220 64-66 Chevelle
Chev 327 300 290 285 66-67 GT
Chev 402 300 325 320 1971 GT
Chev 454 425 435 428 1971 GT
Mopar 440 390 390 385 69-71
Ford 281 235 232 229 2010 CJ
Super Stock Horsepower No Changes
OEM NHRA
Make CID HP HP Years Affected
Chev 231 200 195 95-02 Firebird/Camaro
Chev 283 220 236 64-66 Nova
Chev 283 220 237 64-66 Nova
Chev 327 275 307 66-68 Nova
Chev 327 250 250 1968 Chevelle
Chev 350 295-300 317 67-69 Camaro
Chev 327 250 265 1968 GT
Chev 350 275-300 291 92-98 GT
Chev 350 295-300 322 97-70 GT
Chev 454 345 385 1970 GT
Chev 350 245 250 1973 ???
Mopar 340 240 266 72-73 Dart
Mopar 426 365 305 64-65 Coronet
Ford 302 200 240 1986 ???
Ford 351 280 305 1971 Mustang
