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Marty Rinehart Jr · 02-28-2023, 10:32 AM

I would like to clarify some questions with the 2023 AHFS.
I talked to a lot of people lately and most are not quite sure how this really works.

Here is a short and sweet version of the New AHFS Guidelines.

New AHFS Guidelines

1. ALL runs under -0.65 the index will NOT be used to compute year end averages on any combinations (this essentially eliminates half of all competitors competing in STK/SS)

2. ALL runs over -0.65 under the index will count towards computing the year end average for each engine combination. Your best qualifying run at each event(including C1 class runoffs), all other class runoffs and elimination runs will be counted in the review data.

NOTE: All NHRA National Opens and Jegs All-Star runs do not count towards the year end review data

3. There is no more “Mineshaft” rule.

4. Two one second under runs on any combination, regardless of the class, will trigger a year end review

5. The automatic HP threshold has been raised from -1.20 under the index to -1.30 under the index. This will initiate a minimum 5.25% increase in HP and/or -0.25 change in index the Monday after the event which the run occurred.

6. If the engine combination is reviewed at the end of the season and found to be over -0.85 under in any individual class and/or across the entire engine combination family a HP increase and/or index decrease will be initiated.

7. If the engine combination reviewed is deemed to be over -0.85 under, the FASTEST run made by that combination throughout the year will be used to calculate the HP increase and or index decrease. (ie. Engine avg. is -0.856 under but the fastest run was -1.17 under, a 2.25% increase in HP and/or 0.10 decrease in index will be initiated)

NOTE: A realistic minimum run data threshold should be implemented immediately. Looking at the statistics curtesy of Nitro Joe’s Statistics. A -0.50 under the index minimum run data threshold would be more conducive to calculate engine combination run data averages.

I hope this makes it easier to understand. Below is the link to the NHRA AHFS as it is written.
https://www.nhraracer.com/content/ge...633&zoneid=132

If you would like to receive Div 1 SRAC emails and updates, please email me at Marty@RinehartsPerformance.com with your Name, Class, NHRA#.

02-28-2023, 10:32 AM	#1
Marty Rinehart Jr Member Join Date: Dec 2001 Location: Rineharts Performance Race Cars, Thomasville,PA Posts: 492 Likes: 296 Liked 333 Times in 75 Posts	2023 AHFS system "cliff note version" I would like to clarify some questions with the 2023 AHFS. I talked to a lot of people lately and most are not quite sure how this really works. Here is a short and sweet version of the New AHFS Guidelines. New AHFS Guidelines 1. ALL runs under -0.65 the index will NOT be used to compute year end averages on any combinations (this essentially eliminates half of all competitors competing in STK/SS) 2. ALL runs over -0.65 under the index will count towards computing the year end average for each engine combination. Your best qualifying run at each event(including C1 class runoffs), all other class runoffs and elimination runs will be counted in the review data. NOTE: All NHRA National Opens and Jegs All-Star runs do not count towards the year end review data 3. There is no more “Mineshaft” rule. 4. Two one second under runs on any combination, regardless of the class, will trigger a year end review 5. The automatic HP threshold has been raised from -1.20 under the index to -1.30 under the index. This will initiate a minimum 5.25% increase in HP and/or -0.25 change in index the Monday after the event which the run occurred. 6. If the engine combination is reviewed at the end of the season and found to be over -0.85 under in any individual class and/or across the entire engine combination family a HP increase and/or index decrease will be initiated. 7. If the engine combination reviewed is deemed to be over -0.85 under, the FASTEST run made by that combination throughout the year will be used to calculate the HP increase and or index decrease. (ie. Engine avg. is -0.856 under but the fastest run was -1.17 under, a 2.25% increase in HP and/or 0.10 decrease in index will be initiated) NOTE: A realistic minimum run data threshold should be implemented immediately. Looking at the statistics curtesy of Nitro Joe’s Statistics. A -0.50 under the index minimum run data threshold would be more conducive to calculate engine combination run data averages. I hope this makes it easier to understand. Below is the link to the NHRA AHFS as it is written. https://www.nhraracer.com/content/ge...633&zoneid=132 If you would like to receive Div 1 SRAC emails and updates, please email me at Marty@RinehartsPerformance.com with your Name, Class, NHRA#. __________________ Marty Rinehart Jr 1125 SS STK SG SC SST Last edited by Marty Rinehart Jr; 02-28-2023 at 10:37 AM.