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-   -   Access to AMA Shipping Weights? (https://classracer.com/classforum/showthread.php?t=81453)

Dave Ficacci 02-07-2022 10:52 PM
Re: Access to AMA Shipping Weights?
 
Quote:
Originally Posted by Adub464Q (Post 656910)
What class factor is required for a combo to be obsoleted from Stock Eliminator?

I understand that 7.50 is the factor for AA....but can the combo be any amount under 7.50 and still be allowed to run AA?

Or what is the lowest threshold class factor still allowed in stock? Is a 6.95 class factor allowed to run in AA still?
Per Wesley the ZL1 can still run AA at 6.96. I got this information 2nd hand albeit from a reliable source.

SS734 02-07-2022 10:57 PM
Re: Access to AMA Shipping Weights?
 
Quote:
Originally Posted by Billy Nees (Post 656906)
I can understand your point BUT that's not the way that it was "sold" to us.

IMHO, if the aftermarket head (carrying a +10 factor) gets a HP hit then yes, it should affect the stock head.

The point of my side of this conversation is that whatever the "stock head" HP factor is, the "aftermarket head" factor should be +10!

These "aftermarket" heads were not handed out to be of any advantage other than that of access to the Racer. If the Racer chooses to take advantage of the ease of access provided by the "aftermarket" head then the Racer should be willing to accept the +10 HP/weight penalty.
I agree 100% with you. All of a sudden there were all these new combos born over night!
How about the stock heads make one natural class but the aftermarket headed combos change the natural class.

Oh and add in the combos that give you 2 carb options and 2 different hp factors then add in aftermarket heads!

6 different combos out of one original combo!

Larry Hill 02-08-2022 08:45 AM
Re: Access to AMA Shipping Weights?
 
Dave I don’t think the 427/445 69 Camaro can run AA/SA with the shipping weight of 3096. Divide 3096 by 445= 6.96 p/w. The natural imaginary class is two class below the 7.50 to 7.99 weight break. Adding 222.5 lbs to the shipping weight of 3096 would be 3318.5 lbs. Divide 3318.5 by 445hp = 7.457 p/w, the car would still not be in 7.50 to 7.99 window.

I believe class cars can move up or down one class from the natural class provided there’s a class for it to fit in. That’s how I read the rule book, I could be wrong.

Uncle Al was wise beyond his years.

Adub464Q 02-08-2022 09:26 AM
Re: Access to AMA Shipping Weights?
 
Quote:
Originally Posted by Dave Ficacci (Post 656943)
Per Wesley the ZL1 can still run AA at 6.96. I got this information 2nd hand albeit from a reliable source.
Is there a lower threshold for stock eliminator though? Everyone is assuming that it is 7.00 based on half pound increments between classes and AA being 7.50.

Did this go away when the AA/BB/CC classes were used in the interim roughly 10 years ago, when new weight classes were introduced. I have always heard of a car getting "outfactored" from stock eliminator but never seen it.

BUT where is it written that there is a lower threshold to still be able to run stock?

If there is no lower threshold, then any combo with a class factor lower than 7.50 would be restricted to AA only, and adhering to the 7.50 weight calculation factor.

Larry Hill 02-08-2022 10:25 AM
Re: Access to AMA Shipping Weights?
 
Austin in the rule book in the lower classes of V and W it's XX.00 or more.
No statement for the top class XX.00 or less.

Might be able to make engine 427/425.

If we have to go by the AMA Sheets, what choice do we have; its their, NHRA, Ball, Bat, and Glove

Jack Matyas 02-08-2022 11:05 AM
Re: Access to AMA Shipping Weights?
 
Larry you have a PM .........

Adub464Q 02-08-2022 11:17 AM
Re: Access to AMA Shipping Weights?
 
Quote:
Originally Posted by Larry Hill (Post 656952)
Austin in the rule book in the lower classes of V and W it's XX.00 or more.
No statement for the top class XX.00 or less.

Might be able to make engine 427/425.

If we have to go by the AMA Sheets, what choice do we have; its their, NHRA, Ball, Bat, and Glove
Speaking of the 1969, 427/425 combo.....it is now a natural AA car, therefore it can no longer run B. Class factor changed from 8.02 to 7.86.

The more interesting one to me...someone do the math on the 1969, 396/375 alum head combo. Previously the class factor was 8.16, a natural A car, and the new factor says 8.00......HOWEVER.....

New shipping weight 3238 divided by 405 hp is 7.99506....

So what is the natural class for a 396/375 alum head, is it AA or A? Do you round it up or not?

As the Stocker world turns....

Larry Hill 02-08-2022 12:13 PM
Re: Access to AMA Shipping Weights?
 
No question 7.99999999 is not 8.0

As the cookies crumble. ............ and so it goes

Don Morris 02-08-2022 12:18 PM
Re: Access to AMA Shipping Weights?
 
The 1969 Camaro 396/375 Alum combo is a natural A. NHRA rounds up at .xx5, and down at .xx4. One pound less and this combo would be a Natural AA.

Adger Smith 02-08-2022 12:54 PM
Re: Access to AMA Shipping Weights?
 
Quote:
Originally Posted by SSDA Hemi (Post 656827)
So who stirred the shipping weight pot? or more specifically is Brandon working for NHRA now....
Logic would tell me that has WR all over it...about as far from Brandon as you can get..JS


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