New S/SS NHRA Horsepower Adjustments - Page 4

SSDiv6 · 11-19-2007, 03:32 PM

http://www.nhra.com/content/sportsma...5719&zoneid=85

Year End Stock, Super Stock Horsepower Adjustments Announced
11/19/2007

--------------------------------------------------------------------------------

The following Stock/Super Stock horsepower changes, produced by the Automatic Horsepower Factoring System (AHFS), were released November 19, 2007. This is the second of two scheduled horsepower adjustments for this year, and all changes are effective January 1, 2008. 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 national events only. 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 1.15-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 1.40 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, AHFS@nhra.com.

Ford 302 (140-210)
Old: 205
New: 208
1983-1985
Mustang, Capri, Cougar
Manual Only

Chev 283 (220)
Old: 220
New: 223
1964-1966
Chevrolet, Chev II
Auto Only

Buick 350 (155)
Old: 235
New: 238
1976-1979
Buick
Auto Only

Chev 350 (247, 250)
Old: 269
New: 273
1990-1991
Corvette
Auto Only

Chev 350 (255)
Old: 280
New: 284
1969
Camaro, Chev II
Manual Only

GM 350 (275-285)
Old: 336
New: 341
1993-1998
Camaro, Firebird
Auto Only

Mopar 360 (230-250)
Old: 272
New: 276
1996-2003
Dakota
Auto Only

Ford 428 (335)
Old: 375
New: 380
1968-1970
Mustang
Manual Only

Super Stock Horsepower Changes

Mopar 440 (375)
Old: 356
New: 361
1968-1969 SS
GTS, Swinger, Barracuda
Auto Only

Cad 350 (180)
Old: 180
New: 185
1977 GT
Auto Only

GM 305 (210-215)
Old: 245
New: 251
1985-1986 GT
Auto Only

GM 305 (150-200)
Old: 267
New: 271
1983-1987 GT
Auto Only

Chev 350 (295-300)
Old: 314
New: 318
1967-1970 SS
Camaro, Chev II
Auto Only

Chev 400 (175-180)
Old: 316
New: 320
1974-1976 GT
Auto Only

GM 346 (305-320)
Old: 320
New; 324
1999-2002 GT
Auto Only

Super Stock Index Changes

SS/AX
Old: 9.85
New: 9.80

SS/BM
Old: 9.70
New: 9.65

SS/GS
Old: 14.35
New: 14.30

SS/TD
Old: 11.35
New: 11.30

11-19-2007, 03:32 PM	#1
SSDiv6 VIP Member Join Date: Feb 2003 Location: Glendale, Arizona Posts: 3,044 Likes: 712 Liked 1,583 Times in 582 Posts	New S/SS NHRA Horsepower Adjustments http://www.nhra.com/content/sportsma...5719&zoneid=85 Year End Stock, Super Stock Horsepower Adjustments Announced 11/19/2007 -------------------------------------------------------------------------------- The following Stock/Super Stock horsepower changes, produced by the Automatic Horsepower Factoring System (AHFS), were released November 19, 2007. This is the second of two scheduled horsepower adjustments for this year, and all changes are effective January 1, 2008. 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 national events only. 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 1.15-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 1.40 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, AHFS@nhra.com. Ford 302 (140-210) Old: 205 New: 208 1983-1985 Mustang, Capri, Cougar Manual Only Chev 283 (220) Old: 220 New: 223 1964-1966 Chevrolet, Chev II Auto Only Buick 350 (155) Old: 235 New: 238 1976-1979 Buick Auto Only Chev 350 (247, 250) Old: 269 New: 273 1990-1991 Corvette Auto Only Chev 350 (255) Old: 280 New: 284 1969 Camaro, Chev II Manual Only GM 350 (275-285) Old: 336 New: 341 1993-1998 Camaro, Firebird Auto Only Mopar 360 (230-250) Old: 272 New: 276 1996-2003 Dakota Auto Only Ford 428 (335) Old: 375 New: 380 1968-1970 Mustang Manual Only Super Stock Horsepower Changes Mopar 440 (375) Old: 356 New: 361 1968-1969 SS GTS, Swinger, Barracuda Auto Only Cad 350 (180) Old: 180 New: 185 1977 GT Auto Only GM 305 (210-215) Old: 245 New: 251 1985-1986 GT Auto Only GM 305 (150-200) Old: 267 New: 271 1983-1987 GT Auto Only Chev 350 (295-300) Old: 314 New: 318 1967-1970 SS Camaro, Chev II Auto Only Chev 400 (175-180) Old: 316 New: 320 1974-1976 GT Auto Only GM 346 (305-320) Old: 320 New; 324 1999-2002 GT Auto Only Super Stock Index Changes SS/AX Old: 9.85 New: 9.80 SS/BM Old: 9.70 New: 9.65 SS/GS Old: 14.35 New: 14.30 SS/TD Old: 11.35 New: 11.30 Last edited by SSDiv6; 11-19-2007 at 04:02 PM.