SS/AM Questions?

Karl Owens · 02-03-2014, 06:16 PM

I am putting a car together to run in SS/AM. I have a couple questions I hope can be answered here. The carb rules are a little vague. There is a short list of approved carbs that are all 4150 type carbs and then basically any Holley.

Also I need clarification on the OE NHRA accepted cylinder heads. NHRA allows certain Edelbrock heads in Stock and Super Stock. I have heads with the correct casting number but do not have the NHRA logo engraved on the ends.
Thanks in advance.

Robbie Draughon · 02-03-2014, 06:31 PM

SS/AM is modified so basically you can run any carb, 2 4bbls if you want. Heads have to have GM Part # if a GM car or Ford # if Ford etc. Gm splayed valve or Gm 15 Degree are the norm for heads.

Jim Caughlin · 02-03-2014, 09:40 PM

Be careful about running a single 4bbl in modified, there was some issues brought up in tech a few years ago where people were running super mod cars in modified to avoid heads up runs, the consensus was that you can't cross over. I know it shouldn't matter but it was the way the rules were interpreted by tech.

Karl Owens · 02-04-2014, 11:13 PM

If the heads are on the list as approved heads in Stock/Super Stock but are made by Edelbrock would they be legal?

FireSale · 02-04-2014, 11:29 PM

I haven't wandered much out of the Ford section of the Classification Guides, but the legal replacement Edelbrock, AFR and (I think) Canfield heads are listed by number. At Summit Edelbrock has an NHRA Legal badge on the right heads.

Dale

SSDiv6 · 02-05-2014, 12:34 AM

Cylinder heads must have an OEM part number, not aftermarket.
In the case of the approved Edelbrock heads, they are for Stock and Super Stock classes.
Also, although I do not have the rule book handy, I believe SS/AM allows you to use a canted valve cylinder head in lieu of a wedge cylinder head.

Adger Smith · 02-05-2014, 03:04 AM

OEM part numbers, but I don't think the DRCE 4.90 or 5.0 bore space heads are legal for SS/AM. You have to stay away from certain Pro Stock heads because of the bore space. It has to have stock bore space, like 4.840 for BB Chevies.
There is, or was, a fast SS/AM car that has been eleminated because of the bore space rule. Be careful!!!

Bill Diehl · 02-05-2014, 09:27 AM

hemi? I see it listed in AS but not AM

SSDiv6 · 02-05-2014, 09:56 AM

Quote:

Originally Posted by Adger Smith

OEM part numbers, but I don't think the DRCE 4.90 or 5.0 bore space heads are legal for SS/AM. You have to stay away from certain Pro Stock heads because of the bore space. It has to have stock bore space, like 4.840 for BB Chevies.
There is, or was, a fast SS/AM car that has been eleminated because of the bore space rule. Be careful!!!

Adger is correct, the bore spacing must remain OEM. In SS/AM you are allowed to run a Splayed head valve configuration.

Karl Owens · 02-05-2014, 09:36 PM

My question is if the Edelbrock heads which are on the list as approved castings for certain combinations in stock or super stock can be used in SS Modified. They are not OE but they are approved for Super Stock. For example the 1968 428 Pontiac combination that is allowed to use Edelbrock heads. If I took this combination added a dual four barrel intake and carbs and ran @ 7 #/CID would this combination be legal?

02-03-2014, 06:16 PM	#1
Karl Owens Junior Member Join Date: Dec 2009 Posts: 68 Likes: 0 Liked 0 Times in 0 Posts	SS/AM Questions? I am putting a car together to run in SS/AM. I have a couple questions I hope can be answered here. The carb rules are a little vague. There is a short list of approved carbs that are all 4150 type carbs and then basically any Holley. Also I need clarification on the OE NHRA accepted cylinder heads. NHRA allows certain Edelbrock heads in Stock and Super Stock. I have heads with the correct casting number but do not have the NHRA logo engraved on the ends. Thanks in advance.

02-03-2014, 06:31 PM	#2
Robbie Draughon Junior Member Join Date: Jul 2007 Location: Fayetteville, NC Posts: 72 Likes: 14 Liked 26 Times in 3 Posts	Re: SS/AM Questions? SS/AM is modified so basically you can run any carb, 2 4bbls if you want. Heads have to have GM Part # if a GM car or Ford # if Ford etc. Gm splayed valve or Gm 15 Degree are the norm for heads. __________________ SS/AM 2917

02-03-2014, 09:40 PM	#3
Jim Caughlin Senior Member Join Date: Mar 2002 Location: Woodburn, Or Posts: 635 Likes: 70 Liked 693 Times in 208 Posts	Re: SS/AM Questions? Be careful about running a single 4bbl in modified, there was some issues brought up in tech a few years ago where people were running super mod cars in modified to avoid heads up runs, the consensus was that you can't cross over. I know it shouldn't matter but it was the way the rules were interpreted by tech.

02-04-2014, 11:13 PM	#4
Karl Owens Junior Member Join Date: Dec 2009 Posts: 68 Likes: 0 Liked 0 Times in 0 Posts	Re: SS/AM Questions? If the heads are on the list as approved heads in Stock/Super Stock but are made by Edelbrock would they be legal?

02-04-2014, 11:29 PM	#5
FireSale VIP Member Join Date: Feb 2014 Location: Lakewood Washington Posts: 1,407 Likes: 29 Liked 236 Times in 127 Posts	Re: SS/AM Questions? I haven't wandered much out of the Ford section of the Classification Guides, but the legal replacement Edelbrock, AFR and (I think) Canfield heads are listed by number. At Summit Edelbrock has an NHRA Legal badge on the right heads. Dale __________________ Dale Shearon 68 Mustang 6394

02-05-2014, 12:34 AM	#6
SSDiv6 VIP Member Join Date: Feb 2003 Location: Glendale, Arizona Posts: 2,991 Likes: 693 Liked 1,457 Times in 543 Posts	Re: SS/AM Questions? Cylinder heads must have an OEM part number, not aftermarket. In the case of the approved Edelbrock heads, they are for Stock and Super Stock classes. Also, although I do not have the rule book handy, I believe SS/AM allows you to use a canted valve cylinder head in lieu of a wedge cylinder head.

02-05-2014, 03:04 AM	#7
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,348 Likes: 434 Liked 677 Times in 261 Posts	Re: SS/AM Questions? OEM part numbers, but I don't think the DRCE 4.90 or 5.0 bore space heads are legal for SS/AM. You have to stay away from certain Pro Stock heads because of the bore space. It has to have stock bore space, like 4.840 for BB Chevies. There is, or was, a fast SS/AM car that has been eleminated because of the bore space rule. Be careful!!! __________________ Adger Smith (Former SS) Last edited by Adger Smith; 02-05-2014 at 03:05 AM. Reason: sp

02-05-2014, 09:27 AM	#8
Bill Diehl Member Join Date: Dec 2013 Posts: 311 Likes: 2 Liked 9 Times in 8 Posts	Re: SS/AM Questions? hemi? I see it listed in AS but not AM

02-05-2014, 09:36 PM	#10
Karl Owens Junior Member Join Date: Dec 2009 Posts: 68 Likes: 0 Liked 0 Times in 0 Posts	Re: SS/AM Questions? My question is if the Edelbrock heads which are on the list as approved castings for certain combinations in stock or super stock can be used in SS Modified. They are not OE but they are approved for Super Stock. For example the 1968 428 Pontiac combination that is allowed to use Edelbrock heads. If I took this combination added a dual four barrel intake and carbs and ran @ 7 #/CID would this combination be legal?