Re: Access to AMA Shipping Weights?
 

If this is in fact the case (talking Stock) and with the recent difficulty in getting the "aftermarket" heads then the Racers should not have any problem with NHRA removing the "aftermarket" heads from the accepted lists.
Maybe they (NHRA) could use their recently enacted Rescission policy!

Re: Access to AMA Shipping Weights?
 

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?

Re: Access to AMA Shipping Weights?
 

Not sure I'm on the right subject here. Check out the 71 440 6bbl Roadrunner. It can run A/SA. AA/SA with a Hemi. It is also a natural E/SA with a 340. Some weight got trimmed off that car. Cool makes a new combination in lighter trim.

Paul

Re: Access to AMA Shipping Weights?
 

Hopefully the Mopar big blocks 6 pack combos can get an HP break so we can keep up with the others.
The cars have to weigh almost 4000 lbs
Trying to run with cars that make the same power that weigh 3400 lbs.

It's now like taking a knife gun fight.

Re: Access to AMA Shipping Weights?
 

...

Re: Access to AMA Shipping Weights?
 

So how does the AMA car weight work? I looked at 1970 Plymouth 340 Duster AMA specs. It shows shipping weight at 3105lbs and curb weight at 3269lbs. I get an average of 3187lbs and NHRA shows the shipping weight at 3186lbs. Is that the method or just lucky on one?

Paul

Re: Access to AMA Shipping Weights?
 

I was told shipping weight. All the curb weights are the same on the AMA Sheets for a 70 Cuda, 340, 383, 440, and Hemi. I wonder how NHRA verified the weight of one Cuda with the 340 to the weight of 426 Hemi Cuda?

Re: Access to AMA Shipping Weights?
 

Paul, help me out here maybe I'm confused. The 71 RR 6pak can run A/SA has a lesser shipping weight than GTX. So RR is a natural B and GTX is a Natural C makes sense, Got it. NOW in 1970 both are natural C and the RR has a higher shipping weight, this doesn't seem right??? RR was always the lighter package.

Re: Access to AMA Shipping Weights?
 

There has to be a time in the past that someone got the terms shipping weights and curb weights confused.

As Dwight and I explained earlier, the shipping weight was sort of a "Flat Rate" measurement for shipping purposes, that did not take into account the options of the car, just enough gas to move the car around, no passengers, and without cargo.

The OEM's did away with shipping weights many years ago and kept the curb weights, which accounts for a car with all fluids, full tank, and standard equipment for the specific model.

It is similar to the current curb weight narrative Ford uses for their products and what they weight they recommend for shipping considerations.

https://www.ford.com/support/how-tos...of-my-vehicle/

Re: Access to AMA Shipping Weights?
 

My question is what prompted the review and adjustments? How often is it done?
I don't recall it happening when I raced in the seventies and eighties.

Re: Access to AMA Shipping Weights?
 

Per Wesley the ZL1 can still run AA at 6.96. I got this information 2nd hand albeit from a reliable source.

Re: Access to AMA Shipping Weights?
 

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!

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.

Re: Access to AMA Shipping Weights?
 

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.

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

Re: Access to AMA Shipping Weights?
 

Larry you have a PM .........

Re: Access to AMA Shipping Weights?
 

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....

Re: Access to AMA Shipping Weights?
 

No question 7.99999999 is not 8.0

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

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.

Re: Access to AMA Shipping Weights?
 

Logic would tell me that has WR all over it...about as far from Brandon as you can get..JS

Re: Access to AMA Shipping Weights?
 

If they are currently doing the 60's and 70's cars, I cant wait until they get to the 80's and 90's!! That should get this thread jumping!!

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Hold on to your hats folks, it's going to be a bumpy ride!!!!

Re: Access to AMA Shipping Weights?
 

I can't remember what year it was but the AAMA ceased to exist. I'm pretty sure that it was in the mid-late 70s. The way that I understand it, the NHRA got their weight and tech info right from the manufacturers after that.

Re: Access to AMA Shipping Weights?
 

I emailed Pat Cvengros last week, he (and Wesley) said that every combo in the guide would be compared against the AMA shipping weights. He did apologize for the way this was discovered. It was their intent to post to nhraracer.com like any other update once the it was completed, but the revised pages in the guide were mistakenly published to the site in error.

Like Mr. Hill said, i went to bed as an A/SA car and woke up a C.

Re: Access to AMA Shipping Weights?
 

*****

Re: Access to AMA Shipping Weights?
 

If you run a Gen 3 Camaro, I recommend reviewing the classification guide.

Re: Access to AMA Shipping Weights?
 

https://www.nhraracer.com/content/ge...432&zoneid=132

https://www.nhraracer.com/content/ge...433&zoneid=132

Re: Access to AMA Shipping Weights?
 

So if you go 1.199 under the index does it get rounded up to 1.20 Under?

Re: Access to AMA Shipping Weights?
 

I did find AMA page and for Oldsmobile it only went up to 1972. Hate to think I will in Z/SA

Re: Access to AMA Shipping Weights?
 

Went the other way for me, O(15.16) to N(14.78). Does anyone have a link to the shipping weights that NHRA uses? Everywhere I have looked my car, 94 Mustang GT has a 3276 curb weight but would like to know the shipping they used.

I know, ffffords.

Was showing 3227 from 2012 to 3148 as of today.

Re: Access to AMA Shipping Weights?
 

What changed? Still a natural SS/KA car for the 350.

Re: Access to AMA Shipping Weights?
 

Below my shipping weight is an adder line highlighted in yellow that has the number 277. What is the adder line?
Any ideas?

Kelly

Re: Access to AMA Shipping Weights?
 

It’s awful strange how an LT1 can now have a 300lb lighter shipping weight than an LS1. Never seen an iron block motor get so much lighter than an aluminum version! What is driving these sweeping changes across so many vehicles? I’m assuming there are some whiners that got in the ears of decision makers and now it’s affecting a whole lot of racers for no good reason.

Re: Access to AMA Shipping Weights?
 

So, how many cars are going to show up next week at Pomona and be in the wrong class???? How will it be fixed to make everyone happy?? Good luck to all at Pomona.

I may not race anymore, but I have plenty of friends that race Stock and Super Stock. I can just see the complaint list now.

Re: Access to AMA Shipping Weights?
 

Are the new shipping weights written in blue?

Re: Access to AMA Shipping Weights?
 

Is the LS1 stick no longer eligible for A/S?

Re: Access to AMA Shipping Weights?
 

Not yet!!!!!

Re: Access to AMA Shipping Weights?
 

Your guesses are as good as mine

Re: Access to AMA Shipping Weights?
 

Which year is eligible?

Re: Access to AMA Shipping Weights?
 

None….. yet!