NHRA year end horsepower numbers are out

Bob Don · 12-19-2016, 04:26 PM

2016 End of Year Stock, Super Stock Horsepower Adjustments Announced
The following Stock/Super Stock horsepower changes were released December 19, 2016 produced by the Automatic Horsepower Factoring System (AHFS). This is the second of two scheduled horsepower adjustments for this year. All changes are effective January 1, 2017. 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. 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, AHFS@nhra.com or pcvengros@nhra.com

Stock Horsepower Changes
Complete for 2nd half rating period of 2016

Engine OEM NHRA New
Make CID HP HP HP Years Affected

Buick 350 175 262 266 73-74 Apollo

Chev 262 170 196 199 1996 S-10

Chev 283 220 223 226 1966 Chevy II

Chev 350 300 341 346 1992 Corvette*

Chev 350 530 575 588 14-15 COPO

Chev 396 390 420 430 13-15 COPO

Chev 409 450 450 461 2016 COPO

Chev 427 430 465 471 14-15 COPO

Chev 427 450 461 472 14-15 COPO

Dodge 345 305 337 342 09-10 Drag Pak

Mopar 426 425 450 456 1964 Belvedere

*= correction to match 93, 97-98

Super Stock Horsepower Changes
Complete for 2nd half rating period of 2016

Engine OEM NHRA
Make CID HP HP New HP Years Affected

Dodge 426 450 456 462 09-10 Drag Pak

Dodge 426 460 482 493 2015 Drag Pak

Ford 330 435 504 516 2010 Cobra Jet

12-19-2016, 04:26 PM	#2
Bob Don VIP Member Join Date: Oct 2002 Location: Greater Boston Posts: 1,496 Likes: 1,134 Liked 903 Times in 192 Posts	Re: NHRA year end horsepower numbers are out 2016 End of Year Stock, Super Stock Horsepower Adjustments Announced The following Stock/Super Stock horsepower changes were released December 19, 2016 produced by the Automatic Horsepower Factoring System (AHFS). This is the second of two scheduled horsepower adjustments for this year. All changes are effective January 1, 2017. 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. 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, AHFS@nhra.com or pcvengros@nhra.com Stock Horsepower Changes Complete for 2nd half rating period of 2016 Engine OEM NHRA New Make CID HP HP HP Years Affected Buick 350 175 262 266 73-74 Apollo Chev 262 170 196 199 1996 S-10 Chev 283 220 223 226 1966 Chevy II Chev 350 300 341 346 1992 Corvette* Chev 350 530 575 588 14-15 COPO Chev 396 390 420 430 13-15 COPO Chev 409 450 450 461 2016 COPO Chev 427 430 465 471 14-15 COPO Chev 427 450 461 472 14-15 COPO Dodge 345 305 337 342 09-10 Drag Pak Mopar 426 425 450 456 1964 Belvedere *= correction to match 93, 97-98 Super Stock Horsepower Changes Complete for 2nd half rating period of 2016 Engine OEM NHRA Make CID HP HP New HP Years Affected Dodge 426 450 456 462 09-10 Drag Pak Dodge 426 460 482 493 2015 Drag Pak Ford 330 435 504 516 2010 Cobra Jet __________________ Bob Don 128 SS