Accepted S/SS Cylinder Head Volumes

Jeff Stout · 09-06-2019, 06:46 PM

My head for 307 Olds stocker had a cc volume in the books and I checked and my head matched their specs. Intake and exhaust

RJ Sledge · 09-06-2019, 08:25 PM

I think your giving them too much credit....
If they don’t post runner volume on a head that is posted as legal don’t worry about it.
Just be sure that the head you run is exactly the same number listed as a legal head per NHRA....
If it’s a D70E- DA make sure it’s reads the same in blue print spec.

When did a racer set the runner volume that’s listed in”NHRA Approved Products” list ?????
It’s up to NHRA

RJ

09-06-2019, 06:46 PM	#1
Jeff Stout VIP Member Join Date: Dec 2001 Location: phoenix Posts: 1,486 Likes: 66 Liked 704 Times in 281 Posts	Re: Accepted S/SS Cylinder Head Volumes My head for 307 Olds stocker had a cc volume in the books and I checked and my head matched their specs. Intake and exhaust

09-06-2019, 08:25 PM	#2
RJ Sledge Senior Member Join Date: Jun 2007 Posts: 783 Likes: 503 Liked 288 Times in 90 Posts	Re: Accepted S/SS Cylinder Head Volumes I think your giving them too much credit.... If they don’t post runner volume on a head that is posted as legal don’t worry about it. Just be sure that the head you run is exactly the same number listed as a legal head per NHRA.... If it’s a D70E- DA make sure it’s reads the same in blue print spec. When did a racer set the runner volume that’s listed in”NHRA Approved Products” list ????? It’s up to NHRA RJ

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