No AFHS for National Open @gainsville

[Ed Wright]

Originally Posted by Bruce Noland

They may be saying the ahfs is not in play, but I would be very surprised if they will let a -1.20 run slide.

I don't think a 1.2 under run should slide. If you can run 1.2 under you do need some HP.

[Randall Klein]

1.20 under used to be 1.50 under, it just doesn't sound so far under. Looking at the original Final Qualifying in SS at Indy, the whole field was 1.+ under taking into account the .30 NHRA took off.....who'da thunk? #128 Joe Tueton was 1.022 under with the previous indexes.

With the old mind set of indexes, I think no one would argue that 1.50 under (anywhere, anytime) was deserving of a hit.

[K Stubbs]

When is this race? I would definately go if we can run more than 1.20 under and not get hit, just to set the record.

[Superfan1]

Originally Posted by Chad Rhodes

Those of us that got the email from Mike Crutchfield........ It says NO AHFS, none zip, nada, take the lead out and and bomb the record 1.20 under be damned.

Since there appears to be quite a bit of confusion and uncertainty about the AHFS for this race; I would think that Mike Crutchfield is the person that can clear this up.

[Jack McCarthy]

IF NHRA allows this they can just about say bye bye to me...

why would you pick any sanctioned event and not enforce the sanctioning bodies written rules ?????

captain
however IF any organization would do something this stupid it would be NHRA

[louie conkey]

I have to agree with you captian, nhra dont have our intrest in mind. They change the rules all the time. Why oh why do i still care?

[Pedigo Perf]

[QUOTE=Jack McCarthy;346338]IF NHRA allows this they can just about say bye bye to me...

why would you pick any sanctioned event and not enforce the sanctioning bodies written rules ?????

Maybe they want to put a little fun and entertainment back in the class. I bet it gets a lot of attention that it wouldn't have otherwise .... if it is allowed.

Wish I could go, I'm all for it!

Tracy
(Carson's Dad)

[B Parker]

Ed not to bust your balls but if you can't run 1.20 under or dam close in mine shaft air you need to go work on your car. And yes spend some more money. With all the different enhancements we have had the last few years I think you would be surprised on how many different combos can go that fast. Take a look at Indy and how many went 9 under. And there were a lot more that just didn't put it on kill once they felf they were in the show. Having said that you still need to keep the 1.20 under into play. If just wouldn't be fare to the rest of the opens that have. Most of the older cars have a hp rating that is pretty dam close to where they should be. Every now and than someone finds an older combo that runs like a truck. Now I would be in favor of lifting the 1.20 on all 1999 and older combo's. Lets face it it's the newer cars that aren't even close to the true hp ratings. Barry

[Mike Crutchfield]

Just a FYI, Please see the AHFS rule below. NHRA is following the rule as it is writen.
IT is very specific on which races and which runs count toward the AHFS. The date that Gainesville's race falls on is outside of the two evaluation periods and no where does it say anything about a National Open. Like it or not it is the rule as writen.

I think it will be a very interesting event and the weather should be great that time of the year in Florida. I urge you to come and enjoy yourself. Rich Schaefer has arranged it where you can park or drop off your rig on Wednesday and for anyone wanting to go on to PRI for the day can. The Division 2 Awards Banquet will be held on Sunday starting mid afternoon. Please contact the D2 office for details.

Thanks
MC








Automatic Horsepower Factoring System (AHFS) explained
The AHFS is used to review and evaluate runs in Stock and Super Stock for possible horsepower adjustments. The review is conducted twice per racing season. The two reviews are compiled individually so the data is not cumulative. Runs included in the AHFS database are limited to final qualifying runs (Q data) and all elimination runs (E data) at all NHRA National and LODRS events. (At events where class eliminations are run, all runs are included in the AHFS database. Only the first round of class is part of qualifying and therefore is part of the "Q" database.) The "Q" data and "E" data files are the official data gathered by the NHRA timing system and processed through the NHRA Information Technology department. NHRA "Q" data and "E" data are the only data files used for the AHFS.

The first review period includes data from National and LODRS events 1 through 11 and the second period includes runs from events 12 through 22. The following procedure is used in reviewing run data:

Final qualifying, class eliminations, and elimination runs of 1.00 seconds or more, under the index, at NHRA National and LODRS events will trigger an automatic review. (The combination must make at least two runs of 1.00 or quicker before a review is triggered to prevent a "one time fast run" from triggering the system.) In reviewing runs of 1.00 or more under the index, the database of runs for the engine combination being reviewed are put through three screenings as listed below. The screenings will look for an overall engine family average or class/engine average faster than 0.850-second under. Runs of .350 and slower are not included in calculating the engine or class/engine averages:
Engine family average: The overall engine average for all cars, regardless of class, running the particular engine combination being reviewed are included in this screening.
Class/engine average where engine is run: The class/engine average of the car running the specific combination in the class that triggered the review is studied.
Body style and transmission type: Also considered in the above two screening processes are body style of the engine combination being reviewed and transmission type. Adjustments are only in effect for the specific car model being evaluated. The body style are generally classified by the OEM auto manufacturers' definition of "platform", i.e., the Camaro and Firebird body are both based on the same platform and therefore considered the same with regard to body-style classification. In some instances, however, more than one body style will trigger a review. With regards to transmission type, if the class average triggers the review, the adjustment would be for classes with the type of transmission triggering the change. However, if an engine family average triggers the review, the adjustment would be for all transmission types.
If either the engine family average or the class/engine average are found to be faster than 0.850-second under, a change will be initiated.
To more clearly illustrate how the AHFS program affects a given combination, the following is a hypothetical evaluation in Stock class for a 305-cubic-inch, 215 factory rated horsepower, fuel-injected Camaro during a review period:

Two K/SA Camaros running this combination ran 1.114- and 1.187- second under the index, triggering a review. As per the procedure outlined above, the overall engine average is analyzed first. Upon reviewing the engine average made by the 305/215/241 FI combination, 10 runs had been recorded (2 in K/SA and 8 in L/SA) with a total engine average of .845-second under. Because the overall engine average did not hit the required 0.850 under, the combination did not warrant a horsepower adjustment based on overall engine average.

The next step, per the procedure outlined above, is a class/engine review. The class of the car that actually triggered the review was K/SA. The class review revealed that K/SA had a class/engine average for the combination in question of 1.101-second under, therefore surpassing the 0.850-second-under requirement and signaling a horsepower adjustment for all 305/215/241 FI Camaros.

An important element to note and one most often misunderstood by racers is that although a K/SA Camaro affected the change, the L/SA 305/215/241 FI Camaros that run this combination also received a horsepower adjustment. The reason is that a specific combination can run in more than one class based on NHRA rules; therefore, all cars with the specific engine combination, transmission and body style will be affected.

Once the need for an adjustment is determined, the following sliding-scale formula, based on a percentage of horsepower, is used to calculate the horsepower increase:

Under Index Horsepower Increase Index Change
1.000-1.099 1.25% -.05
1.100-1.199 2.25% -.10
1.200-1.249 3.25% -.15
(immediate change)
1.250-1.299 4.25% -.20 (immediate change)
1.300-1.349 5.25% -.25 (immediate change)
1.350-1.399 6.25% -.30 (immediate change)
1.400-1.449 7.25% -.35 (immediate change)
1.450- 1.499 8.25% -.40 (immediate change)
1.500- 1.549 9.25% -.45 (immediate change)
1.550- 1.599 10.25% -.50 (immediate change)
1.600- 1.649 11.25% -.55 (immediate change)
1.650- 1.699 12.25% -.60 (immediate change)
1.700- 1.749 13.25% -.65 (immediate change)
1.750- 1.799 14.25% -.70 (immediate change)
1.800- 1.849 15.25% -.75 (immediate change)
1.850- 1.899 16.25% -.80 (immediate change)
1.900- 1.949 17.25% -.85 (immediate change)
1.950- 1.999 18.25% -.90 (immediate change)



Adjustments are rounded up to the nearest full horsepower even if the fraction is below 0.5 horsepower. As an example, 2.15 horsepower is rounded to 3 horsepower. The quickest run, by the combination being reviewed, is used to determine the adjustment percentage.

Runs of 1.200 or more under the index will be reviewed and adjusted Tuesday following the event. Runs at all NHRA events, including those at altitude factored race tracks, are included in the 1.200-second-or-more-under analysis. This is done to better react to any out-of-line indexes or under-horsepowered combinations. Therefore, at all such events, a horsepower adjustment or index reduction will be initiated Tuesday following the event.
The decision to adjust horsepower or to reduce the index will be at the discretion of the NHRA Tech Department.


In addition to reviews resulting in a horsepower increase, a written request (only one request per competitor, per review period.) will trigger a review for the purpose of a decrease in horsepower factor or index adjustment. The request must include eliminator, year, model, engine size, advertised horsepower, factored horsepower, and class; to be eligible. Incomplete requests will not be reviewed.


The screenings will look for an overall engine family average less than 0.550-seconds under. Runs of 0.100-second under and slower are not included in calculating the engine average:

In addition, the combination must NOT make two runs of 0.650 or quicker for the review to continue or any run 0.850 or quicker.)

Engine family average: The overall engine average for all cars, regardless of class, running the particular engine combination being reviewed is included in this screening. If the engine family average is found to be slower than 0.550-second under, a change will be initiated.

To more clearly illustrate how the AHFS program affects a given combination, the following is a hypothetical evaluation in Stock Eliminator for a 305 cubic-inch, 150 factory rated horsepower, carbureted Camaro during a review period:


A written request triggered a review by the committee. As per the procedure outlined above, there were NOT 2 runs 0.650-second or quicker preventing a review or ANY run 0.850-second or quicker preventing a review. The overall engine average is analyzed next. Upon reviewing the engine average made by the combination, 10 runs had been recorded (2 in I/SA and 8 in J/SA) with a total engine average of 0.535-second under. Because the overall engine average did not hit the required 0.550-second under, the combination proceeds with the evaluation.


Once the need for an adjustment is determined, the following sliding-scale formula, based on a percentage of horsepower, is used to calculate the horsepower decrease:

Under Index Horsepower Decrease Index Change
0.166-quicker 1.25% +.05
0.101-0.165 2.25% +.10


Adjustments are rounded up to the nearest full horsepower even if the fraction is below 0.5 horsepower. As an example, 2.15 horsepower is rounded to 3 horsepower. The quickest run, by the combination being reviewed, is used to determine the adjustment percentage. The decision to adjust horsepower or to increase the index will be at the discretion on the AHFS Committee.

[Randall Klein]

.....or as Len Imbrogno stated at its inception: "the simple AHFS formula"