NHRA Announces Changes to Class Guide

Tom Meyer · 09-14-2011, 08:35 AM

So backing up, at what hp will the autos no longer be in stock?? At 491 the sticks carry 610 extra 110 over the legal amount. Tom

Chad Rhodes · 09-14-2011, 09:13 AM

do we have a link for this? because that would be NHRA actually doing the right thing, and that's kinda rare these days

Chad Rhodes · 09-14-2011, 09:15 AM

Quote:

Originally Posted by Chad Rhodes

do we have a link for this? because that would be NHRA actually doing the right thing, and that's kinda rare these days

just saw this on the new nhraracer.com. Kudos to NHRA and y'all boys keep the hammer down!!!!

Eric Merryfield · 09-14-2011, 02:17 PM

Quote:

Originally Posted by Tom Meyer

So backing up, at what hp will the autos no longer be in stock?? At 491 the sticks carry 610 extra 110 over the legal amount. Tom

Take the car shipping weight of 3240 add the 500 subtract the jockey weight of 170 divide by AA 7.5

= 476....

476X7.5= 3570 +170 =3740....

475

I am not sure how that will ultimately play out with the new max weight rule....But thats a math quandry for a different day....but it sort of looks like now your max weight for say a CJ auto @ 461 is 3740.....and not the 8X461+170

Dwight Southerland · 09-14-2011, 04:27 PM

Driver weight is never considered in calculation for class. It is only added to the classification weight for weight at the scales. The minimum vehicle weight to run AA/S with a power factor of 476 is 476 x 7.5 = 3570. The 170 lb allowance for the driver weight is added to that to determine a scale weight : 3570 + 170 = 3750 That number would be placed on the side window for the people at the scale to reference.

If you want to calculate the maximum horsepower in question for the 2008 CJ, use the shipping weight of 3240 and add 500 to it (the maximum allowable ballast). That total is 3740. Then divide by the AA/S 7.5 weight break (3740 / 7.5). The answer is 498.67. That causes me to question NHRA's decision and calculations.

491 x 7.5 = 3682.5 3683 - 500 = 3183

Their claim of 610 lbs. means 3240 + 610 = 3850. I don't know where they get that.

TOM KASCH · 09-14-2011, 04:37 PM

What about Downings combo ?
This is not his is it ?
think he has a 231 or what ever it is engine.

Billy Nees · 09-14-2011, 04:43 PM

491 x7.5 =3682.5 +170= 3852.5 -610 = 3242.5 rounds to 3240. They included the driver!

Frank B. · 09-14-2011, 05:06 PM

Great so NHRA now considers stocker drivers as ballast!!!

Tom Meyer · 09-14-2011, 08:44 PM

So at 466 they only have one more hit to go with the autos. Who will be the one to throw them under the bus? And you guys thought Barton got crap for his run. Tom

Alan Roehrich · 09-14-2011, 09:49 PM

Quote:

Originally Posted by Frank B.

Great so NHRA now considers stocker drivers as ballast!!!

Warren Johnson has been saying that for years about every class.

In my case, that has been a cold hard fact, on numerous occasions.

09-14-2011, 08:35 AM	#1
Tom Meyer Senior Member Join Date: Aug 2003 Location: Pierce NE Posts: 936 Likes: 77 Liked 351 Times in 120 Posts	Re: NHRA Announces Changes to Class Guide So backing up, at what hp will the autos no longer be in stock?? At 491 the sticks carry 610 extra 110 over the legal amount. Tom __________________ Tom Meyer 5240 SS Stock ???

09-14-2011, 09:13 AM	#2
Chad Rhodes VIP Member Join Date: Jan 2005 Location: Where the Green Grass Grows, AL Posts: 2,375 Likes: 0 Liked 3 Times in 3 Posts	Re: NHRA Announces Changes to Class Guide do we have a link for this? because that would be NHRA actually doing the right thing, and that's kinda rare these days __________________ Chad Rhodes 2113 I/SA

09-14-2011, 04:27 PM	#5
Dwight Southerland VIP Member Join Date: Dec 2001 Location: Arkansas - In the middle of everything. Posts: 1,999 Likes: 64 Liked 772 Times in 192 Posts	Re: NHRA Announces Changes to Class Guide Driver weight is never considered in calculation for class. It is only added to the classification weight for weight at the scales. The minimum vehicle weight to run AA/S with a power factor of 476 is 476 x 7.5 = 3570. The 170 lb allowance for the driver weight is added to that to determine a scale weight : 3570 + 170 = 3750 That number would be placed on the side window for the people at the scale to reference. If you want to calculate the maximum horsepower in question for the 2008 CJ, use the shipping weight of 3240 and add 500 to it (the maximum allowable ballast). That total is 3740. Then divide by the AA/S 7.5 weight break (3740 / 7.5). The answer is 498.67. That causes me to question NHRA's decision and calculations. 491 x 7.5 = 3682.5 3683 - 500 = 3183 Their claim of 610 lbs. means 3240 + 610 = 3850. I don't know where they get that.

09-14-2011, 04:37 PM	#6
TOM KASCH VIP Member Join Date: Apr 2004 Location: TOLEDO,OHIO Posts: 1,735 Likes: 0 Liked 241 Times in 100 Posts	Re: NHRA Announces Changes to Class Guide What about Downings combo ? This is not his is it ? think he has a 231 or what ever it is engine.

09-14-2011, 04:43 PM	#7
Billy Nees VIP Member Join Date: Oct 2002 Location: On a hilltop in Pa. Posts: 4,485 Likes: 3,587 Liked 7,682 Times in 1,730 Posts	Re: NHRA Announces Changes to Class Guide 491 x7.5 =3682.5 +170= 3852.5 -610 = 3242.5 rounds to 3240. They included the driver! __________________ Billy Nees 1188 STK, SS I'm not spending 100K to win 2K

09-14-2011, 05:06 PM	#8
Frank B. Member Join Date: Jun 2007 Posts: 139 Likes: 0 Liked 43 Times in 24 Posts	Re: NHRA Announces Changes to Class Guide Great so NHRA now considers stocker drivers as ballast!!!

09-14-2011, 08:44 PM	#9
Tom Meyer Senior Member Join Date: Aug 2003 Location: Pierce NE Posts: 936 Likes: 77 Liked 351 Times in 120 Posts	Re: NHRA Announces Changes to Class Guide So at 466 they only have one more hit to go with the autos. Who will be the one to throw them under the bus? And you guys thought Barton got crap for his run. Tom __________________ Tom Meyer 5240 SS Stock ???