NHRA Announces Changes to Class Guide

[Stephen & Horace Johnson]

Originally Posted by Mike Nottingham

NHRA Announces Changes to Class Guide
As a result of the sixteen horsepower added to the 2008 Ford Cobra Jet (manual only) 330 cubic inch 425/491 in Stock Eliminator, the combination is no longer eligible for Stock Eliminator. This is due to the combination now required to carry 610 pounds of ballast. Per the 2011 NHRA Rulebook Section 20 page 16-17 it reads in-part "Maximum amount of removable and/or permanent ballast, unless otherwise stated under Class Requirements is 500 pounds."

this is interesting

[james schaechter]

I hear he is putting a 4.6 liter in it with a stick! First small block stocker in the 9's maybe? LOL.
(naturally aspirated)

[jmcarter]

Fezell is entered at Charlotte in AA/S....guess that will be an interesting conversation in tech line today.

[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

[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

[Chad Rhodes]

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]

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]

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]

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

[Andrew Hill]

Originally Posted by james schaechter

I hear he is putting a 4.6 liter in it with a stick! First small block stocker in the 9's maybe? LOL.
(naturally aspirated)

It's a 2008, I don't think he can put any other motors in it