Cylinder Head Runner Volumes

zracer305 · 12-15-2008, 05:16 PM

Quote:

Originally Posted by Woodro Josey

ZRACER305 is probably talking about me,,, and yes the heads were complete and will pass Tech. or would have and i was furnishing the cores!

Woodro I wasn't going to mention your name. LOL However, I did find a shop locally who is finishing up a set that I should pick up today. My problem is that the rules keep changing and I'm not willing to jump through those hoops. The heads I buy today may be obsolite tomarrow. You can have any valve train aftermarket part but, roller rockers. Where's it going to end.

Stock was designed to be the grass roots class for beginers. I was starting a father/son project (more father than son, maybe he saw the light before me) where I could spend some quality time on a project with him. NHRA stock is far beyond our means. How could we ever compete with the Pro's. Now I hear Don Garlits want to run a stocker. I'ts just not reasonable.

I will say that through this fourm I have learned a lot about the new eara of drag racing and I have met a lot of nice people Dean Oliver, Mike Voth, and Aaron Leown the list can go on and on. One question I did have though... is that "Have a Good Day" Bobby Baker a real person or an imposter who likes to get on here and piss everyone else off. Sorry Bobby but I had to get that one in. LOL I enjoy reading all of your posts too.

Myron Piatek · 12-15-2008, 05:50 PM

Quote:

Originally Posted by zracer305

Now I hear Don Garlits want to run a stocker. I'ts just not reasonable.

Just try to pick a class that Garlits or one of the other pro-sportsman aren't in. Then you can focus on your driving, not how much they spent to go "very" fast.

As for getting back to "stock" Stock, we all know that many OEM parts are difficult to find, expensive and in some, but not all cases, superceded anyway. And that would require tech to spend more time and effort to enforce more details which, unfortunately, they are trying to get away from and likely won't reverse their course.

Rod Greene · 12-15-2008, 07:22 PM

When NHRA poured heads for SS They didn't take into account different valves. On my 72 340 stock heads with flat valves the cc's are bigger than spec with the tulip valve they are smaller. I talked with Bruce about this a few years ago. I would have to fill a stock port to make them meet the spec. I have 20 sets of stock unmolested 340 heads

Myron Piatek · 12-15-2008, 07:37 PM

Are 3/8" stem Mopar valves that are necked down in the bowl area legal in NHRA? That would alter the volume also.

RJ · 12-15-2008, 07:38 PM

Quote:

Originally Posted by Rod Greene

When NHRA poured heads for SS They didn't take into account different valves. On my 72 340 stock heads with flat valves the cc's are bigger than spec with the tulip valve they are smaller. I talked with Bruce about this a few years ago. I would have to fill a stock port to make them meet the spec. I have 20 sets of stock unmolested 340 heads

Another one Rod is the 894 casting 2.020" valve 340 head, how does that pour 2 c.c.'s LESS than the 587 casting 1.880" valve 360 head with the same port geometry?

Dick Butler · 12-15-2008, 07:40 PM

X-tech man? I know that if a "pure" stock class of new cars were started again some kind of evolution would take place in the next 30 years again. Do you agree with the similarity involved with Stk and SS today?Maybe since I have not actually had a Stock class car I am missing the expensive differences. How would you "restart" or preserve the entry level position of a Stock class?

12-15-2008, 07:22 PM	#3
Rod Greene Senior Member Join Date: Mar 2002 Location: TN Posts: 530 Likes: 436 Liked 242 Times in 81 Posts	Re: Cylinder Head Runner Volumes When NHRA poured heads for SS They didn't take into account different valves. On my 72 340 stock heads with flat valves the cc's are bigger than spec with the tulip valve they are smaller. I talked with Bruce about this a few years ago. I would have to fill a stock port to make them meet the spec. I have 20 sets of stock unmolested 340 heads __________________ Rod Greene Real men shift for them selves. Slowly working on TA Challenger for D,E/S and a 72 Challenger for SS/K, L as if I don't have enough other projects.

12-15-2008, 07:37 PM	#4
Myron Piatek VIP Member Join Date: Nov 2001 Location: Florida Posts: 1,542 Likes: 34 Liked 138 Times in 51 Posts	Re: Cylinder Head Runner Volumes Are 3/8" stem Mopar valves that are necked down in the bowl area legal in NHRA? That would alter the volume also. __________________ LOCOMOTION Racing

12-15-2008, 07:40 PM	#6
Dick Butler VIP Member Join Date: Oct 2002 Location: Richmond Indiana Posts: 1,196 Likes: 5 Liked 32 Times in 19 Posts	Re: Cylinder Head Runner Volumes X-tech man? I know that if a "pure" stock class of new cars were started again some kind of evolution would take place in the next 30 years again. Do you agree with the similarity involved with Stk and SS today?Maybe since I have not actually had a Stock class car I am missing the expensive differences. How would you "restart" or preserve the entry level position of a Stock class?