Super Stock's Second Under Index

[FABMAN]

1 2100 SS/CM Lee Sharp, Maryville TN, '08 G5 8.724 9.80 -1.076
2 2010 SS/BM Jim Smiley, Springfield TN, '91 Calais 8.616 9.65 -1.034
3 2931 SS/AS Jon Richardson, Lexington NC, '67 Camaro 8.880 9.90 -1.020
4 1116 SS/AA John Armstrong, Kingston NS, '69 Corvette 8.984 10.00 -1.016

My question, will NHRA drop index on these classes and why did they run that far under if this would happen.

 

[haagar]

1 2100 SS/CM Lee Sharp, Maryville TN, '08 G5 8.724 9.80 -1.076
2 2010 SS/BM Jim Smiley, Springfield TN, '91 Calais 8.616 9.65 -1.034
3 2931 SS/AS Jon Richardson, Lexington NC, '67 Camaro 8.880 9.90 -1.020
4 1116 SS/AA John Armstrong, Kingston NS, '69 Corvette 8.984 10.00 -1.016

My question, will NHRA drop index on these classes and why did they run that far under if this would happen.

I'm not 100% sure what the criteria for NHRA to drop an index is in super stock, but I know that John Armstrong has run a ton faster than that.

 

[Demon]

That won't drop the indexes.1.40 under I believe is the magic trigger number.

 

[dave]

1 2100 SS/CM Lee Sharp, Maryville TN, '08 G5 8.724 9.80 -1.076
2 2010 SS/BM Jim Smiley, Springfield TN, '91 Calais 8.616 9.65 -1.034
3 2931 SS/AS Jon Richardson, Lexington NC, '67 Camaro 8.880 9.90 -1.020
4 1116 SS/AA John Armstrong, Kingston NS, '69 Corvette 8.984 10.00 -1.016

My question, will NHRA drop index on these classes and why did they run that far under if this would happen.

You go to indy at the US nats and if you aren't a second under, you are not safe in a 128 car field

 

[StockersRock]

That won't drop the indexes.1.40 under I believe is the magic trigger number.

You are correct, sir.

 

[Bill]

I am not sure if the indexes are affected usually, by the amount you run under an index.

What IS affected sometimes, is the horsepower factor on your combination.

The following is from the NHRA webpage on the AHFS (Automatic Horsepower Factoring System.)
______________________________________________________________

______________________________________________________________
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
1.150-1.299 1.25% -.05
1.300-1.399 2.25% -.10
1.400-or greater 3.25% -.15
(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 1.40 or more under the index will be reviewed and adjusted as soon as such runs were made. Runs at divisional events and National Opens are included in the 1.40-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 3.25 percent horsepower adjustment or index reduction will be initiated immediately. The decision to adjust horsepower or to reduce the index will be at the discretion of the NHRA Tech Department.


So, it looks like a horsepower factor change for the individual type of engine in question, rather than a lowering of the index for the whole class is the likely action to be taken by NHRA when 1.4-under runs are in question for Stockers and Super Stockers. I think individual HP factors are changed a lot more often than indexes are moved.

Hope this helps...

Bill