IHRA classification guide

R. Thorne · 03-30-2010, 06:12 AM

Does IHRA have classification guide and or current HP available online for stock? Found HP corrections only. Thanks, Ron.

Mike Carr · 03-30-2010, 09:44 AM

To the best of my knowledge, no they don't. I believe they follow the NHRA classification and HP, with some exceptions. For example, the '93-'98 LT-1 is rated 279 in NHRA S/S, and still at 275 in IHRA. IHRA allows pre-1960 cars in Stock, NHRA does not. IHRA also has some different classes not offered in NHRA (Crate Motor Stock, Stock GT, Pure Stock, Super Stock Production, as well as seperate Truck, EFI classes and more FWD Stock classes). Some HP ratings will differ. On the Tech page there, there should be contact info for all the IHRA tech personel, best bet would be to contact someone and get an answer.

Eric Merryfield · 03-30-2010, 10:43 AM

Quote:

Originally Posted by R. Thorne

Does IHRA have classification guide and or current HP available online for stock? Found HP corrections only. Thanks, Ron.

Not online. Contact Tech. If a new combo they follow whats on the NHRA's site. They don't follow the NHRA's increases, just the decreases, and also have as has been stated truck, FI, and pure stock.

You might get your answer just as quick asking here from a racer running that combo.

Eric

R. Thorne · 03-30-2010, 06:16 PM

Thanks, guys, for the info.

danny waters sr · 03-31-2010, 06:49 AM

What is the application. ? I have a set of books and may can help.

greg fulk · 03-31-2010, 10:04 PM

Danny 80-81 Z-28 with a 305?????

Patrick Kelliher · 04-01-2010, 06:55 AM

I believe it is the same as the non Z-28 '81 camaro at 241 HP.

danny waters sr · 04-01-2010, 08:41 AM

80 Z/28 = 180/ 238, 14.35 break= natural M class.........80 Berlinetta Z/28 =180/238 , 14.55 break = natural N class........81 Z/28 not listed. only Berlinetta & camaro listed = 155/241 ,14.31 break = natural M class ,regular camaro is same hp with a 14.08 break . Hope this helps.

Patrick Kelliher · 04-01-2010, 09:01 AM

Whats the major body difference between an '80 and '81

danny waters sr · 04-01-2010, 11:10 AM

Not sure . They look pretty much the same. Anybody know ?

03-30-2010, 06:12 AM	#1
R. Thorne Member Join Date: May 2009 Posts: 180 Likes: 51 Liked 99 Times in 32 Posts	IHRA classification guide Does IHRA have classification guide and or current HP available online for stock? Found HP corrections only. Thanks, Ron.

03-30-2010, 09:44 AM	#2
Mike Carr VIP Member Join Date: Nov 2001 Location: Enon Valley PA Posts: 1,650 Likes: 234 Liked 83 Times in 37 Posts	Re: IHRA classification guide To the best of my knowledge, no they don't. I believe they follow the NHRA classification and HP, with some exceptions. For example, the '93-'98 LT-1 is rated 279 in NHRA S/S, and still at 275 in IHRA. IHRA allows pre-1960 cars in Stock, NHRA does not. IHRA also has some different classes not offered in NHRA (Crate Motor Stock, Stock GT, Pure Stock, Super Stock Production, as well as seperate Truck, EFI classes and more FWD Stock classes). Some HP ratings will differ. On the Tech page there, there should be contact info for all the IHRA tech personel, best bet would be to contact someone and get an answer. __________________ Mike Carr, Tri-State S/SS Association President Looking for 2015 S/SS Race Sponsors Contact me if interested buffdaddy_1302@hotmail.com (724) 510-5912

03-30-2010, 06:16 PM	#4
R. Thorne Member Join Date: May 2009 Posts: 180 Likes: 51 Liked 99 Times in 32 Posts	Re: IHRA classification guide Thanks, guys, for the info.

03-31-2010, 06:49 AM	#5
danny waters sr VIP Member Join Date: Apr 2007 Location: lagrange,nc Posts: 2,224 Likes: 1 Liked 0 Times in 0 Posts	Re: IHRA classification guide What is the application. ? I have a set of books and may can help. __________________ Danny Waters, Sr / 73 Duster "340"

03-31-2010, 10:04 PM	#6
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	Re: IHRA classification guide Danny 80-81 Z-28 with a 305????? __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"

04-01-2010, 06:55 AM	#7
Patrick Kelliher Member Join Date: May 2006 Location: New Hampshire Posts: 124 Likes: 0 Liked 0 Times in 0 Posts	Re: IHRA classification guide I believe it is the same as the non Z-28 '81 camaro at 241 HP.

04-01-2010, 08:41 AM	#8
danny waters sr VIP Member Join Date: Apr 2007 Location: lagrange,nc Posts: 2,224 Likes: 1 Liked 0 Times in 0 Posts	Re: IHRA classification guide 80 Z/28 = 180/ 238, 14.35 break= natural M class.........80 Berlinetta Z/28 =180/238 , 14.55 break = natural N class........81 Z/28 not listed. only Berlinetta & camaro listed = 155/241 ,14.31 break = natural M class ,regular camaro is same hp with a 14.08 break . Hope this helps. __________________ Danny Waters, Sr / 73 Duster "340"

04-01-2010, 09:01 AM	#9
Patrick Kelliher Member Join Date: May 2006 Location: New Hampshire Posts: 124 Likes: 0 Liked 0 Times in 0 Posts	Re: IHRA classification guide Whats the major body difference between an '80 and '81

04-01-2010, 11:10 AM	#10
danny waters sr VIP Member Join Date: Apr 2007 Location: lagrange,nc Posts: 2,224 Likes: 1 Liked 0 Times in 0 Posts	Re: IHRA classification guide Not sure . They look pretty much the same. Anybody know ? __________________ Danny Waters, Sr / 73 Duster "340"