CLASS RACER FORUM - View Single Post - Word is 1.15 under for AHFS at Opens and Divisional races

RPinoski1 · 12-01-2007, 09:10 AM

NHRA Stock and Super Stock Horsepower Factoring System

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11/22/2000

As the 2000 season comes to a conclusion, final data input has been completed for NHRA's new Automatic Horsepower Factoring System for Stock and Super Stock categories. Prior to its implementation, racers are asked to review the proposed new system as outlined below and provide feedback. The system is based on actual run data from qualifying at NHRA national events. The data-based format will provide the ability to automatically calculate average performances for any class and/or engine combination in Stock and Super Stock.

The system will begin building the 2001 database at the AutoZone Winternationals in February with the first automatic adjustments going into effect in late May.

"As many racers are aware, there are a few combinations and indexes that are currently so far out of line, we will make some adjustments prior to the start of the new season," said Len Imbrogno, Director of Sportsman Racing.

NHRA tech officials are currently preparing the list of those to be adjusted and will publish the list the first week in December for racers to review.

Details of the new system are as follows.
1. Horsepower increases/decreases and index increases/decreases will be automatic.

2. Only National Event Final Qualifying sheets will be counted for horsepower adjustments. All other national event runs, as well as divisional and national open runs, will not be included.

3. Runs of 1.25 seconds or more under their respective index, as well as runs .25-second or less under their index, will trigger an evaluation. (The use of 1.25 under for both Stock and Super Stock is the result of both eliminator brackets having the same overall averages. Also, the 1.25 number may appear liberal to some racers, however, it is a starting point from which a change is possible once the system is in operation).

4. Upon evaluation, the database of qualifying runs will be used to calculate class average, and engine family average. If the class average or engine family average is faster than 1.00 second under index, or slower than .50-second under the index, a change will be initiated.

5. The horsepower adjustment will be based on a stepped percentage of horsepower as follows:

INCREASES REDUCTIONS MODIFIEDS
1.25 - 1.34 under = 1.25% .50 - .41 under = 1.25% 1.25 -1.34 under = .05 sec index
1.35 - 1.44 under = 2.25% .40 - .31 under = 2.25% 1.35 -1.44 under = .10 sec index
1.45 or greater = 3.25% .30 or less = 3.25% 1.45 or greater = .15 sec index

All adjustments are rounded UP to the nearest full horsepower, even if the fractional portion is below .5 horsepower. For example, 2.15 horsepower becomes 3 horsepower. The quickest run is used to determine the adjustment percentage.

6. In cases where an adjustment renders a particular vehicle ineligible for the Eliminator, exceptions will be granted to permit the vehicle to carry extra weight. A hypothetical example: Certain model Camaros, with a 460-horsepower 454, will be unable to make GT/AA if any horsepower is added to the engine, because of the rule that states that no more than 250 pounds can be added to the original shipping weight in SS/GT. In this instance, NHRA would permit the vehicle to carry more weight in order to remain in competition.

7. Even though adjustment is automatic, adjustments will only become effective three times per year: May 21, August 6 and January 1. For instance, if a Stock engine records a run quicker than 1.25 under at the Mac Tools Gatornationals (March 15-18 in Gainesville, Fla.), the adjustment will not become effective until May 21, the Monday after the Matco Tools Spring SuperNationals in Englishtown, N.J.

8. Adjustments will be effective for the specific car model being evaluated. For instance, if a 220 horsepower/283 receives an adjustment because of runs made in a Malibu, it will only get horsepower in the Malibu, not the Impala.

9. Horsepower reductions for vehicles that do not have a run on the database will still be handled through written requests. Requests will be reviewed and any reductions will be effective on the same three dates as automatic adjustments. Requests must be received no later than 30 days prior to a review date, otherwise they get bumped to the next review date.

Any questions or comments should be directed to Jim Skelly via email at JSkelly@nhra.com, via fax at 626-914-7551, or in writing to Jim Skelly, NHRA, PO Box 5555, Glendora, CA 91740-0950. Racers are encouraged to give their input.

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12-01-2007, 09:10 AM	#5
RPinoski1 Member Join Date: Jan 2002 Location: PLACERVILLE, CA Posts: 182 Likes: 0 Liked 0 Times in 0 Posts	Re: Word is 1.15 under for AHFS at Opens and Divisional races NHRA Stock and Super Stock Horsepower Factoring System -------------------------------------------------------------------------------- 11/22/2000 As the 2000 season comes to a conclusion, final data input has been completed for NHRA's new Automatic Horsepower Factoring System for Stock and Super Stock categories. Prior to its implementation, racers are asked to review the proposed new system as outlined below and provide feedback. The system is based on actual run data from qualifying at NHRA national events. The data-based format will provide the ability to automatically calculate average performances for any class and/or engine combination in Stock and Super Stock. The system will begin building the 2001 database at the AutoZone Winternationals in February with the first automatic adjustments going into effect in late May. "As many racers are aware, there are a few combinations and indexes that are currently so far out of line, we will make some adjustments prior to the start of the new season," said Len Imbrogno, Director of Sportsman Racing. NHRA tech officials are currently preparing the list of those to be adjusted and will publish the list the first week in December for racers to review. Details of the new system are as follows. 1. Horsepower increases/decreases and index increases/decreases will be automatic. 2. Only National Event Final Qualifying sheets will be counted for horsepower adjustments. All other national event runs, as well as divisional and national open runs, will not be included. 3. Runs of 1.25 seconds or more under their respective index, as well as runs .25-second or less under their index, will trigger an evaluation. (The use of 1.25 under for both Stock and Super Stock is the result of both eliminator brackets having the same overall averages. Also, the 1.25 number may appear liberal to some racers, however, it is a starting point from which a change is possible once the system is in operation). 4. Upon evaluation, the database of qualifying runs will be used to calculate class average, and engine family average. If the class average or engine family average is faster than 1.00 second under index, or slower than .50-second under the index, a change will be initiated. 5. The horsepower adjustment will be based on a stepped percentage of horsepower as follows: INCREASES REDUCTIONS MODIFIEDS 1.25 - 1.34 under = 1.25% .50 - .41 under = 1.25% 1.25 -1.34 under = .05 sec index 1.35 - 1.44 under = 2.25% .40 - .31 under = 2.25% 1.35 -1.44 under = .10 sec index 1.45 or greater = 3.25% .30 or less = 3.25% 1.45 or greater = .15 sec index All adjustments are rounded UP to the nearest full horsepower, even if the fractional portion is below .5 horsepower. For example, 2.15 horsepower becomes 3 horsepower. The quickest run is used to determine the adjustment percentage. 6. In cases where an adjustment renders a particular vehicle ineligible for the Eliminator, exceptions will be granted to permit the vehicle to carry extra weight. A hypothetical example: Certain model Camaros, with a 460-horsepower 454, will be unable to make GT/AA if any horsepower is added to the engine, because of the rule that states that no more than 250 pounds can be added to the original shipping weight in SS/GT. In this instance, NHRA would permit the vehicle to carry more weight in order to remain in competition. 7. Even though adjustment is automatic, adjustments will only become effective three times per year: May 21, August 6 and January 1. For instance, if a Stock engine records a run quicker than 1.25 under at the Mac Tools Gatornationals (March 15-18 in Gainesville, Fla.), the adjustment will not become effective until May 21, the Monday after the Matco Tools Spring SuperNationals in Englishtown, N.J. 8. Adjustments will be effective for the specific car model being evaluated. For instance, if a 220 horsepower/283 receives an adjustment because of runs made in a Malibu, it will only get horsepower in the Malibu, not the Impala. 9. Horsepower reductions for vehicles that do not have a run on the database will still be handled through written requests. Requests will be reviewed and any reductions will be effective on the same three dates as automatic adjustments. Requests must be received no later than 30 days prior to a review date, otherwise they get bumped to the next review date. Any questions or comments should be directed to Jim Skelly via email at JSkelly@nhra.com, via fax at 626-914-7551, or in writing to Jim Skelly, NHRA, PO Box 5555, Glendora, CA 91740-0950. Racers are encouraged to give their input. --------------------------------------------------------------------------------