NHRA Stock/Super Stock Classification

Bruno 3776 · 02-20-2010, 12:40 PM

Can someone help me to understand how to read the classification guide? To determine the weight break, do I look at the year of the car with the size of the intended engine in the same year?

My intended combo is for Super Stock.

1982 Mustang hatchback
1968 302, 4 barrel engine
Automatic engine

Thanks for the info.

Mike Carr · 02-20-2010, 01:18 PM

Based on the Classification, a 3 door `982 Mustang has a shipping weight of anywhere from 2,555 to 2,582 (depending on base model, GT, GLX or GL body). There are two, 1968 Ford 302's listed. One is a 210 HP NHRA rated, one is a 230 HP NHRA (de-rated to 200 with OEM heads or 230 with Replacement Heads). Using the 210 version, in the GLX body, the weight break is 12.29, making it a natural GT/I or GT/IA, and is permitted to also run GT/H(A) and GT/J(A).

http://www.nhra.net/tech_specs/class...s/1968FORD.xls
http://www.nhra.net/tech_specs/class...s/1982FORD.xls

Bruno 3776 · 02-20-2010, 03:55 PM

Mike: thanks for the explanation.

One other question, how do I determine which HP rated 302 I would be using?

David Ley · 02-20-2010, 04:40 PM

210 hp is a 2 bbl. combination
230 hp is the 4 bbl.

Bruno 3776 · 02-20-2010, 05:10 PM

So if my heads show the casting of 2V - C8OE-J and based off of the NHRA blueprint guide, these are for the 210 HP combination. I'm assuming that means I couldn't use them on a 4 bbl 230 HP combination, correct?

Mike also pointed out that the 230 HP combination is with "replacement heads" and defactored with a OEM heads. I don't see a specific replacement head listed for the 1968 302. Any ideas about how to find out what that replacement head is?

David Ley · 02-20-2010, 05:36 PM

All the information you need is in the Classification Guide and the Engine Blueprint lists. If you look at the top of the 68 Ford Class Guide ( GT Specs) it shows the different HP ratings for the different heads. When you go to the specific car in the Class Guide ( 68Mustang ) it shows the replacement heads. In your case Canfield or AFR. Now if you are really serious about this combo you can claim it as a 68 Mercury 302 and you get to use a Holley carb.

Mike Carr · 02-20-2010, 10:27 PM

I typed the wrong info earlier. The 230 HP 4 bbl motor is NHRA-rated at 220 with OEM heads and 230 with replacement head. I incorrectly wrote 200 earlier with OEM heads.

Bill Harris · 02-21-2010, 11:29 AM

Bruno, the C8OE-J heads are the 2BBL heads and have a larger combustion chamber than the 4BBL heads. The 4BBL engine was 10:1 while the 2BBL was 9:1 which is why the chambers are larger. So, no, you can't use them on the 302/230 engine in S/S. The right heads are either C7OE-C or C8OE-F.

There are two aftermarket heads approved for the engine. One is a AFR #1299/165 and the other is an Canfield #18350. The S/S HP using the aftermarket heads is 230 while it it 220 if using the Ford heads.

Jeff Lee · 02-21-2010, 07:27 PM

I'm with Terry and I've looked at this as a GT / SS option for a Maverick. Go with the 1968 Mercury 302. Class break down is the same as the '68 Ford 302 4bbl

Wisman Racing · 12-01-2010, 10:03 PM

I am putting my '69 Camaro into super stock next year. I just need to know if IHRA's horsepower factor is the same as nhra's, and if I were to goto super stock production how do i find a combination to use?

02-20-2010, 01:18 PM	#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: NHRA Stock/Super Stock Classification Based on the Classification, a 3 door `982 Mustang has a shipping weight of anywhere from 2,555 to 2,582 (depending on base model, GT, GLX or GL body). There are two, 1968 Ford 302's listed. One is a 210 HP NHRA rated, one is a 230 HP NHRA (de-rated to 200 with OEM heads or 230 with Replacement Heads). Using the 210 version, in the GLX body, the weight break is 12.29, making it a natural GT/I or GT/IA, and is permitted to also run GT/H(A) and GT/J(A). http://www.nhra.net/tech_specs/class...s/1968FORD.xls http://www.nhra.net/tech_specs/class...s/1982FORD.xls __________________ 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

02-20-2010, 03:55 PM	#3
Bruno 3776 Junior Member Join Date: Jan 2010 Location: Alexandria, KY Posts: 12 Likes: 0 Liked 0 Times in 0 Posts	Re: NHRA Stock/Super Stock Classification Mike: thanks for the explanation. One other question, how do I determine which HP rated 302 I would be using? __________________ Ronnie Dozier Last edited by Bruno 3776; 02-20-2010 at 04:17 PM.

02-20-2010, 04:40 PM	#4
David Ley Member Join Date: Dec 2001 Location: South Jersey Posts: 123 Likes: 0 Liked 0 Times in 0 Posts	Re: NHRA Stock/Super Stock Classification 210 hp is a 2 bbl. combination 230 hp is the 4 bbl. __________________ Dave Ley NHRA TECH

02-20-2010, 05:10 PM	#5
Bruno 3776 Junior Member Join Date: Jan 2010 Location: Alexandria, KY Posts: 12 Likes: 0 Liked 0 Times in 0 Posts	Re: NHRA Stock/Super Stock Classification So if my heads show the casting of 2V - C8OE-J and based off of the NHRA blueprint guide, these are for the 210 HP combination. I'm assuming that means I couldn't use them on a 4 bbl 230 HP combination, correct? Mike also pointed out that the 230 HP combination is with "replacement heads" and defactored with a OEM heads. I don't see a specific replacement head listed for the 1968 302. Any ideas about how to find out what that replacement head is? __________________ Ronnie Dozier

02-20-2010, 05:36 PM	#6
David Ley Member Join Date: Dec 2001 Location: South Jersey Posts: 123 Likes: 0 Liked 0 Times in 0 Posts	Re: NHRA Stock/Super Stock Classification All the information you need is in the Classification Guide and the Engine Blueprint lists. If you look at the top of the 68 Ford Class Guide ( GT Specs) it shows the different HP ratings for the different heads. When you go to the specific car in the Class Guide ( 68Mustang ) it shows the replacement heads. In your case Canfield or AFR. Now if you are really serious about this combo you can claim it as a 68 Mercury 302 and you get to use a Holley carb. __________________ Dave Ley NHRA TECH

02-20-2010, 12:40 PM	#1
Bruno 3776 Junior Member Join Date: Jan 2010 Location: Alexandria, KY Posts: 12 Likes: 0 Liked 0 Times in 0 Posts	NHRA Stock/Super Stock Classification Can someone help me to understand how to read the classification guide? To determine the weight break, do I look at the year of the car with the size of the intended engine in the same year? My intended combo is for Super Stock. 1982 Mustang hatchback 1968 302, 4 barrel engine Automatic engine Thanks for the info. __________________ Ronnie Dozier

02-20-2010, 10:27 PM	#7
Mike Carr VIP Member Join Date: Nov 2001 Location: Enon Valley PA Posts: 1,650 Likes: 234 Liked 83 Times in 37 Posts	Re: NHRA Stock/Super Stock Classification I typed the wrong info earlier. The 230 HP 4 bbl motor is NHRA-rated at 220 with OEM heads and 230 with replacement head. I incorrectly wrote 200 earlier with OEM heads. __________________ 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

02-21-2010, 11:29 AM	#8
Bill Harris Member Join Date: Mar 2002 Location: Ooltewah, TN Posts: 421 Likes: 13 Liked 26 Times in 13 Posts	Re: NHRA Stock/Super Stock Classification Bruno, the C8OE-J heads are the 2BBL heads and have a larger combustion chamber than the 4BBL heads. The 4BBL engine was 10:1 while the 2BBL was 9:1 which is why the chambers are larger. So, no, you can't use them on the 302/230 engine in S/S. The right heads are either C7OE-C or C8OE-F. There are two aftermarket heads approved for the engine. One is a AFR #1299/165 and the other is an Canfield #18350. The S/S HP using the aftermarket heads is 230 while it it 220 if using the Ford heads. __________________ Bill Harris ex 2172 STK ex 2272 S/S

02-21-2010, 07:27 PM	#9
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: NHRA Stock/Super Stock Classification I'm with Terry and I've looked at this as a GT / SS option for a Maverick. Go with the 1968 Mercury 302. Class break down is the same as the '68 Ford 302 4bbl __________________ Jeff Lee 7494 D/S '70 AMX

12-01-2010, 10:03 PM	#10
Wisman Racing Junior Member Join Date: Nov 2010 Location: Cambridge, Ontario Posts: 24 Likes: 0 Liked 4 Times in 2 Posts	Re: NHRA Stock/Super Stock Classification I am putting my '69 Camaro into super stock next year. I just need to know if IHRA's horsepower factor is the same as nhra's, and if I were to goto super stock production how do i find a combination to use?