Horsepower Adjustments – From Competitor Requests
- Dec 18, 2020
- 4 min read
Horsepower Adjustments – From Competitor Requests
The NHRA Technical Department released Horsepower changes December 18, 2020 after review and evaluation of written requests from Lucas Oil Sportsman Series competitors. All changes are effective January 1, 2021. Only those requests received by November 17, 2020 were considered during this scheduled evaluation. Any requests received after November 17, 2020 will be reviewed during the next scheduled evaluation of 2021.
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 16, 2021 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
GM 350 160-170 275 271 1977 Malibu
Mopar 273 235 210 207 65-67 Valiant
Mopar 440 390 400 395 1969 Roadrunner
Ford 302 150 200 197 1986 Thunderbird
Ford 227 260 260 234 11-14 Mustang
Ford 302 230 220 217 1968 Mustang
Pont 421 405 385 360 1962 Catalina
Stock Horsepower No Changes
OEM NHRA
Make CID HP HP Years Affected
AMC 258 114 148 1977 Pacer
AMC 304 125 180 1979 Spirit
Chev 122 110 115 1975 Vega
Chev 196 105 112 1979 Monza
Chev 302 290 309 1969 Camaro
Chev 305 145 180 1978 Monza
GM 305 170 210 1992 Firebird
GM 305 210 241 1991 Camaro
GM 305 215 258 1985 Camaro
Chev 327 275 265 1968 Chevelle
Chev 327 275 270 1967 Camaro
Chev 327 350 293 1965 Chevelle
Chev 350 165 287 1976 Nova
Chev 350 175 283 1978 Malibu
Chev 350 185 279 1978 Corvette
Chev 350 195 293 1974 Corvette
Chev 350 255 263 1969 Kingswood
Chev 350 300 282 1970 Chevelle
Chev 350 300 296 1969 Camaro
Chev 396 325 325 1968 Camaro
Chev 396 350 340 1969 Camaro
Chev 396 375 412 1969 Camaro
Chev 402 210 315 1972 Chevrolet
Chev 402 375 400 1970 Camaro
Chev 402 375 415 1970 Nova
Chev 427 425 435 1969 Camaro
Chev 427 450 499 2015 COPO
Chev 454 450 430 1970 Chevelle
Mopar 273 180 159 1965 Valiant
Mopar 340 290 319 1970 Challenger
Mopar 360 175 284 1976 Volare
Mopar 360 185 289 1980 Volare
Mopar 360 230 276 1996 Dakota
Mopar 360 245 297 1974 Duster
Mopar 370 385 440 2010 Drag Pak
Mopar 383 270 235 1967 Belvedere
Mopar 426 415 403 1964 Belvedere
Mopar 426 425 430 1966 Belvedere
Mopar 426 425 430 1970 GTX
Mopar 426 425 435 1968 Roadrunner
Mopar 440 385 396 1971 Charger
Ford 281 225 204 1998 Mustang
Ford 302 380 380 11-14 Mustang
Ford 302 500 562 2013 Cobra Jet
Ford 351 275 330 1972 Mustang
Ford 351 330 355 1971 Mustang
Ford 390 320 327 1967 Mustang
Ford 390 320 327 1967 Fairlane
Olds 455 250 327 1972 442
Olds 455 365 350 1970 442
Pont 455 250 306 1974 Firebird
* = no such combination listed in the class guide.
Super Stock Horsepower Changes
OEM NHRA
Make CID HP HP HP Years Affected
GM 231 200 167 164 95-02 Firebird
Chev 396 375 400 395 1969 Camaro
Chev 350 350 342 337 13-15 GT RWD
Chev 454 215 346 336 1975 GT RWD
Ford 227 260 260 234 11-14 Mustang
Ford 302 155-200 240 220 1986 Capri
Ford 302 155-200 240 220 1986 GT
Ford 302 230 220 217 1968 GT RWD
Ford 351 266 276 272 73-74 GT RWD
Mopar 440 375 356 351 68-69 Dart
Super Stock Horsepower No Changes
OEM NHRA
Make CID HP HP Years Affected
Chev 265 180 205 1955 Belair
Chev 283 220 233 1966 Chevy II
Chev 327 300 295 1968 Corvette
Chev 327 300 281 66-67 GT RWD
Chev 350 530 597 2014 COPO
Chev 427 450 461 2015 COPO
Chev 327 250 250 1962 GT RWD
Chev 327 250 270 1965 GT FWD
GM 346 305 313 1999 GT FWD
Chev 350 255 294 1969 GT FWD
Chev 350 255 299 1969 GT FWD
Chev 400 175 311 1976 GT RWD
Chev 402 300 308 1971 GT RWD
Mopar 318 155 232 1980 Aspen
Mopar 340 275 268 1971 Duster
Mopar 340 275 276 1971 Duster
Mopar 426 425 453 1971 Cuda
Mopar 426 425 500 1965 Coronet
Mopar 340 240 258 1972 GT FWD
Mopar 400 210 290 1976 GT RWD
Mopar 360 48 440 1970 Challenger*
Ford 289 225 209 1965 Mustang
Ford 427 410 410 1967 Fairlane
Ford 427 415 425 1967 Fairlane
Ford 289 210 200 1964 GT RWD
Ford 302 230 230 1968 GT RWD
Olds 455 350 312 1971 442
Pont 428 390 312 1968 GT
Super Stock Index No Changes
Class
SS/CM
* = no such combination listed in the class guide.
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