SS Head Porting Rules ?

Mark Ugrich · 02-20-2020, 11:40 PM

No, porting is not allowed in stock eliminator. You need to find the volumes allowed in super stock for your particular cylinder head.

72 goat · 02-21-2020, 01:07 AM

My experience with late model (7K3, 4X) heads is that from the factory the port size is smaller than the maximum allowed, and the chamber is larger than the minimum allowed. My (non professional) experience is that the heads can be milled to get to minimum cc's, and that bowl work can really improve flow.

Alan Nyhus · 02-21-2020, 09:28 AM

Register to Dwight's site and you can find the accepted port volumes on anything that's in the NHRA books. It also shows the rest of the engine specs and classification.

The yellow highlighted area on the rt. is slick as it shows the different cars a specific engine came in. -Al

http://www.classracerinfo.com

02-20-2020, 11:40 PM	#1
Mark Ugrich Member Join Date: May 2011 Location: Auburndale,Florida Posts: 220 Likes: 29 Liked 71 Times in 38 Posts	Re: SS Head Porting Rules ? No, porting is not allowed in stock eliminator. You need to find the volumes allowed in super stock for your particular cylinder head.

02-21-2020, 01:07 AM	#2
72 goat Junior Member Join Date: Apr 2010 Posts: 2 Likes: 1 Liked 1 Time in 1 Post	Re: SS Head Porting Rules ? My experience with late model (7K3, 4X) heads is that from the factory the port size is smaller than the maximum allowed, and the chamber is larger than the minimum allowed. My (non professional) experience is that the heads can be milled to get to minimum cc's, and that bowl work can really improve flow.

02-21-2020, 09:28 AM	#3
Alan Nyhus VIP Member Join Date: Dec 2002 Location: Lower Dakota territory Posts: 1,180 Likes: 1,074 Liked 799 Times in 236 Posts	Re: SS Head Porting Rules ? Register to Dwight's site and you can find the accepted port volumes on anything that's in the NHRA books. It also shows the rest of the engine specs and classification. The yellow highlighted area on the rt. is slick as it shows the different cars a specific engine came in. -Al http://www.classracerinfo.com __________________ "That'll never work....." Last edited by Alan Nyhus; 02-21-2020 at 09:31 AM.