Points/Stats Schedules







Competition
National Events
Regional/Division Events
Member Track Directory
Division Offices
SRAC Advisor
Competition Number/License Applications & Forms
NHRA Approved ASO's
Insurance Claim Information
Tech
Automatic Horsepower Factoring System
AHFS Request
Engine Blueprint Specifications
Indexes and Records
NHRA Accepted Products
Rules
Stock Car Classification
Tech Support Contacts
Contingency
Contingency Award Rules & Policies
Contingency Sponsor Requirements
Mello Yello Series Event Contingency Posting
NHRA Contingency Sponsor Approved Decals
W9 Form

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








RM