NHRA Horsepower Rating

njk53 · 01-24-2010, 08:34 PM

How would one go about trying to get the horsepower rating for your car reduced? Is there a formal procedure you have to follow with the NHRA?
Opinions?

Alan Roehrich · 01-24-2010, 09:38 PM

Yes, there is a formal procedure. You write a letter to NHRA stating your case, and you need to use statistical evidence to prove your case.

Ed Fernandez · 01-24-2010, 09:48 PM

This has been hashed over a few times before.You make a bunch of flat out runs.If you are around .4-5 under or less submit the time slips with a request.If you have a combo that the average car is going fairly fast you might be out of luck.I don't know what the
threshold is though.You submit it to national tech in Glendora.
Since the .3 index hit the numbers might be different now.Wouldn't surprise me if they don't know where to go with it now.

GTX JOHN · 01-25-2010, 05:27 AM

In 2005 I wrote a number of letters to NHRA on horsepower. I think it was Jim skully I talked to. He suggested that I compare the horse power on my combo with other comparable combination. He said to use as many spec. comparisons as possible to show why mine ..needed to be adjusted down. There was a certain date you need to have you letter in by. Sometimes, you can make matters worse for yourself. Our wagon with 360 was factored at 285HP at that time and same engine was 274HP with same specs in 2 door car ! When the new specs. came out in Jan.... they dropped the 2 door to 270HP and raised our wagon to 289HP..... OUCH

01-24-2010, 08:34 PM	#1
njk53 Senior Member Join Date: Jul 2007 Location: East China, MI Posts: 504 Likes: 0 Liked 0 Times in 0 Posts	NHRA Horsepower Rating How would one go about trying to get the horsepower rating for your car reduced? Is there a formal procedure you have to follow with the NHRA? Opinions? __________________ Nelson Kowal Stock 345

01-24-2010, 09:38 PM	#2
Alan Roehrich VIP Member Join Date: May 2006 Location: Murfreesboro TN Posts: 4,915 Likes: 996 Liked 1,043 Times in 274 Posts	Re: NHRA Horsepower Rating Yes, there is a formal procedure. You write a letter to NHRA stating your case, and you need to use statistical evidence to prove your case. __________________ Alan Roehrich 212A G/S Last edited by Alan Roehrich; 01-24-2010 at 09:40 PM.

01-24-2010, 09:48 PM	#3
Ed Fernandez Veteran Member Join Date: Nov 2001 Location: NOO JOISEY nexta NOO YAWK Posts: 5,879 Likes: 38 Liked 100 Times in 45 Posts	Re: NHRA Horsepower Rating This has been hashed over a few times before.You make a bunch of flat out runs.If you are around .4-5 under or less submit the time slips with a request.If you have a combo that the average car is going fairly fast you might be out of luck.I don't know what the threshold is though.You submit it to national tech in Glendora. Since the .3 index hit the numbers might be different now.Wouldn't surprise me if they don't know where to go with it now. __________________ Former NHRA #1945 Former IHRA #1945 T/SA

01-25-2010, 05:27 AM	#4
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,530 Likes: 2,222 Liked 1,809 Times in 572 Posts	Re: NHRA Horsepower Rating In 2005 I wrote a number of letters to NHRA on horsepower. I think it was Jim skully I talked to. He suggested that I compare the horse power on my combo with other comparable combination. He said to use as many spec. comparisons as possible to show why mine ..needed to be adjusted down. There was a certain date you need to have you letter in by. Sometimes, you can make matters worse for yourself. Our wagon with 360 was factored at 285HP at that time and same engine was 274HP with same specs in 2 door car ! When the new specs. came out in Jan.... they dropped the 2 door to 270HP and raised our wagon to 289HP..... OUCH