69 Chevelle AA/SA 10.04 at 125mphat Spring Nats

[Adub464Q]

Originally Posted by Alan Roehrich

Austin, congratulations to both you and Will, and thank you! Good luck racing that car.

By no means was I complaining, questioning, or saying you did anything wrong, Austin. You got them to move that combination to a natural A combination, finally, and I'm glad you did. Thanks again.

No problem, just explaining the process we went through for everyone. Like I said, we didn't turn the tech card in until it was fully changed online, even after getting a verbal confirmation.

Also, I will be back in the duster soon enough, we just had an issue come up with that car.

You know you've done something when Jason line looks at the car and says "What combo runs AA in a chevelle?"

[M Brand 505B]

NHRA had originally rounded the 8.49*** to 8.50 which wasn't right.

[Alan Roehrich]

The 8.49 has always been rounded to 8.50, and as recently as a year or so, when I looked, NHRA policy was anything over 0.25 pounds was rounded to 0.50 pounds for classification, as written in the rule book. I was looking at buying an already finished car a couple of years back, and NHRA told us in no uncertain terms that the 427/425 in the 69 Chevelle was 8.50 natural with the automatic, and we could not put the car in AA with an automatic.

By absolutely no means am I complaining, I actually hope that it is correct for the class. The 69 Chevelle is my chosen combination to be the companion car to the 69 Camaro Kevin Cradduck and I have campaigned since 2007. The only engine we couldn't share between cars is the ZL-1 we have. So, yeah, I'm hoping fervently that a cast iron head L-72 gets rounded DOWN to 8.00 instesd of up to 8.50, because I'd like to be able to run AA with either transmission. I'd much rather be able to run A or AA with both transmissions.

[countrypuppy4865]

They do not round up to half lbs. They round using the 3rd decimal point. If it was 8.494 it would be considered 8.49.

[Dwight Southerland]

This is interesting. I have a copy of the Class Guide sheet for 1969 Chevrolet that I downloaded on 1/25/17 after the end of the year factors were added. It shows the factor to be 8.50, which is consistent with the math (3611 ship wt / 425 factor = 8.49647, rounds to 8.50). However, if you look at the same sheet on NHRA's website now, that factor is 8.49 with no indication that any change was made on the sheet. (Dates are included at the bottom of each sheet that documents changes.)

For anyone who is Excel knowledgeable, the formula for that cell was changed from (8.3*435/Q272) to (8.29*435/Q272), so a change was made.

Here is the sheet from 1/25/17. Note the document date at the bottom is 1/1/17, the same as the current sheet on the NHRA website. Sounds like politics to me.

[Larry Hill]

If NHRA starts rounding the numbers, then NHRA will be changing the shipping weight. If the number is 8.4999999 it should be 8.49, just use the first two places to the right of the decimal point. Its so easy even a hillbilly can do it.