Index Change

Sean Ward · 12-18-2009, 02:56 PM

can you post the link someone thanks

Joe Schaechter · 12-18-2009, 03:09 PM

Here is the link:

http://www.nhra.net/content/sportsma...9436&zoneid=85

fredjohnston · 12-18-2009, 03:10 PM

The AHFS will impact very few combinations with the new indexs. The HP committees job just got alot easier.

The new Mustangs and Mopars will most likely never see an adjustment.

The proper way to adjust horsepower ratings is to take the average under the index runs of each car/engine combination and average them against each other.

Example: car/engine average for combination X = .95 under index
car/engine average for combination Y = .75 under index

The HP needs to be adjusted for up (raised) for combination X or lowered (decreased) for combination Y.

They aren't reinventing the wheel or performing brain surgery here.

Michael Beard · 12-18-2009, 03:40 PM

Or they could've just moved the trigger up .15, which is primarily what they've done. It just won't LOOK like a -1.55 under run on paper next time.

Now guys can race to 1,150'. Maybe they can put a cone out there for that. Congratulations, NHRA, you've accomplished.... um.... something, I guess.

Casey Miles · 12-18-2009, 03:51 PM

NHRA could have approached the indexes a different way. They could've just made a valve spring pressure rule that would slow everyone up. Make it so that the pressure can't exceed 150 lbs on the seat. But NHRA doesn't want to work for their membership money which means testing pressures of the valve springs.
Casey Miles
248H (Exceptionally/Slow)

west coast · 12-18-2009, 03:56 PM

Now Div and Nat open count and alt adjust tracks this will put alot more runs in AHFS. Should of lower the triggers by .3 or more.

Greg Hill · 12-18-2009, 04:05 PM

Div. and opens only count if you go fast enough for instant hp. 1.25 under the new indexes.

Mickey Whaley · 12-18-2009, 04:15 PM

so basically the cars that haven't been hit with HP have a huge advantage

hadtobethere · 12-18-2009, 04:58 PM

Quote:

Originally Posted by Mickey Whaley

so basically the cars that haven't been hit with HP have a huge advantage

yup, the ones that bagged got their xmas gift

Lyn Smith · 12-18-2009, 05:12 PM

One good thing to come out of all this is its only going to take 7 tenths under to get into Indy next year!!!!LOL

12-18-2009, 02:56 PM	#1
Sean Ward Member Join Date: Apr 2006 Location: Grand Island FL. Posts: 389 Likes: 0 Liked 0 Times in 0 Posts	Re: Index Change can you post the link someone thanks __________________ Sean Ward NHRA s/ss/comp#2882 SW4 MOTORSPORTS

12-18-2009, 03:09 PM	#2
Joe Schaechter Member Join Date: Mar 2006 Location: Moline, Illlinois Posts: 194 Likes: 1 Liked 13 Times in 4 Posts	Re: Index Change Here is the link: http://www.nhra.net/content/sportsma...9436&zoneid=85 __________________ Joe Schaechter 3168 STK

12-18-2009, 03:10 PM	#3
fredjohnston Member Join Date: Jul 2007 Posts: 341 Likes: 0 Liked 55 Times in 14 Posts	Re: Index Change The AHFS will impact very few combinations with the new indexs. The HP committees job just got alot easier. The new Mustangs and Mopars will most likely never see an adjustment. The proper way to adjust horsepower ratings is to take the average under the index runs of each car/engine combination and average them against each other. Example: car/engine average for combination X = .95 under index car/engine average for combination Y = .75 under index The HP needs to be adjusted for up (raised) for combination X or lowered (decreased) for combination Y. They aren't reinventing the wheel or performing brain surgery here. Last edited by fredjohnston; 12-18-2009 at 03:31 PM.

12-18-2009, 03:40 PM	#4
Michael Beard VIP Member Join Date: Sep 2002 Location: Columbus, OH Posts: 4,060 Likes: 0 Liked 13 Times in 9 Posts	Re: Index Change Or they could've just moved the trigger up .15, which is primarily what they've done. It just won't LOOK like a -1.55 under run on paper next time. Now guys can race to 1,150'. Maybe they can put a cone out there for that. Congratulations, NHRA, you've accomplished.... um.... something, I guess. __________________ Michael Beard - NHRA/IHRA 3216 S/SS

12-18-2009, 03:51 PM	#5
Casey Miles Senior Member Join Date: Jun 2006 Posts: 703 Likes: 127 Liked 488 Times in 90 Posts	Re: Index Change NHRA could have approached the indexes a different way. They could've just made a valve spring pressure rule that would slow everyone up. Make it so that the pressure can't exceed 150 lbs on the seat. But NHRA doesn't want to work for their membership money which means testing pressures of the valve springs. Casey Miles 248H (Exceptionally/Slow)

12-18-2009, 03:56 PM	#6
west coast Senior Member Join Date: Dec 2008 Location: Rainy Washington Posts: 609 Likes: 12 Liked 222 Times in 72 Posts	Re: Index Change Now Div and Nat open count and alt adjust tracks this will put alot more runs in AHFS. Should of lower the triggers by .3 or more.

12-18-2009, 04:05 PM	#7
Greg Hill VIP Member Join Date: May 2006 Location: Louisville , KY Posts: 1,995 Likes: 68 Liked 279 Times in 68 Posts	Re: Index Change Div. and opens only count if you go fast enough for instant hp. 1.25 under the new indexes. __________________ Greg Hill 4171 STK

12-18-2009, 04:15 PM	#8
Mickey Whaley VIP Member Join Date: Dec 2006 Posts: 1,220 Likes: 0 Liked 1 Time in 1 Post	Re: Index Change so basically the cars that haven't been hit with HP have a huge advantage

12-18-2009, 05:12 PM	#10
Lyn Smith VIP Member Join Date: Dec 2001 Location: Pontiac,il. Posts: 1,198 Likes: 280 Liked 963 Times in 193 Posts	Re: Index Change One good thing to come out of all this is its only going to take 7 tenths under to get into Indy next year!!!!LOL

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