Stocker Head Rule Change????

Bruce Walton · 11-14-2008, 03:17 PM

My son goes to UNOH, and a teacher at the facility stated -NHRA is changing the rules on head work on stocker heads for 2009; He stated that you are allowed to port/polish the head as long as it does not exceed 170 cc's. I was wondering if this is true???

Woodro Josey · 11-14-2008, 03:29 PM

Bruce, i have not heard anything close to this. We are allowed any Valve job including bowl Cut as long as it is done on centerline of the valve guide. Any Valve job means any angle on the valve seat or the valve it self and no more .250 under or above the seat, the .250 is omitted!

Bruce Walton · 11-14-2008, 03:56 PM

Thanks for the imput, but my son's teacher at UNOH is in the process of doing a couple pairs of heads for stockers that are running with NHRA this year. These heads ar suppose to be used in the 2009 NHRA season. I am just trying to find out if this teacher is telling the truth or if the stockers are just going to do this on their own! My son corredted me on one item-it is 170cfm's on the flow bench and not a 170 cc's.

Chad Rhodes · 11-14-2008, 04:56 PM

Quote:

Originally Posted by Bruce Walton

Thanks for the imput, but my son's teacher at UNOH is in the process of doing a couple pairs of heads for stockers that are running with NHRA this year. These heads ar suppose to be used in the 2009 NHRA season. I am just trying to find out if this teacher is telling the truth or if the stockers are just going to do this on their own! My son corredted me on one item-it is 170cfm's on the flow bench and not a 170 cc's.

how are you going to apply one flow rating or runner size to literally hunderds of head castings........... and is NHRA Tech now going to haul a flowbench ( and someone that knew how to differentiate it from a vaccuum cleaner) to every race.

Jeff Lee · 11-14-2008, 04:57 PM

Hilghly unlikely NHRA would have a blanket rule of "170 CFM" intake or even 170cc volume to cover all makes as there are many makes which exceed these numbers (both CFM & CC as delivered from Detroit. Also, highly unlikely NHRA would carry a flow bench with them to check flow.
Now, would NHRA allow porting to published SS port volumes? That's more realistic but I would opinion highly unlikely. At least not in the near future...

Jeff Lee · 11-14-2008, 04:59 PM

Looks like Chad and I were thinking and typing alike...

Bob Pagano · 11-14-2008, 05:26 PM

Jeff,
Looks like Chad's reaction time was better than yours... :~) This sounds like some racers that have told the teacher what to do. I would be calling a Div Tech or national Tech dept to check this out if I were in his shoes. That sounds like too much departure from Stocker heads & current rules. More like Super Stock.
Sure would surprise me if they (NHRA) allowed something like this.
Adger Smith
On Bob's sign in....

Tom Moock · 11-14-2008, 07:46 PM

Head rule for 2009, I was told they were not pouring intake or exhaust runner, and no specs, like super stock, They can pour runner if they want, no welding or grinding in ports, but no spec`s like SS for runner size, combustion chamber will checked per nhra rule. vavle rules same as 2008, But by 2010 they may change rules again, to SS runner size, you never known what they may do? Tom

hadtobethere · 11-14-2008, 08:41 PM

Quote:

Originally Posted by Tom Moock

.......They can pour runner if they want, no welding or grinding in ports, but no spec`s like SS for runner size, combustion chamber will checked per nhra rule. vavle rules same as 2008...... Tom

Tom, if they pour runner and they are not using SS specs...then what?

Tom Moock · 11-14-2008, 09:21 PM

Hadtobethere; I was told SS number don`t apply, Mite there be lawyer`s involved head disqualificationin`s in divison 5? Tom

11-14-2008, 03:17 PM	#1
Bruce Walton Junior Member Join Date: Jan 2003 Location: Mount Vernon, Ohio Posts: 4 Likes: 0 Liked 0 Times in 0 Posts	Stocker Head Rule Change???? My son goes to UNOH, and a teacher at the facility stated -NHRA is changing the rules on head work on stocker heads for 2009; He stated that you are allowed to port/polish the head as long as it does not exceed 170 cc's. I was wondering if this is true??? __________________ Bruce Walton 3715 STK

11-14-2008, 03:29 PM	#2
Woodro Josey Senior Member Join Date: Jul 2007 Posts: 805 Likes: 0 Liked 3 Times in 1 Post	Re: Stocker Head Rule Change???? Bruce, i have not heard anything close to this. We are allowed any Valve job including bowl Cut as long as it is done on centerline of the valve guide. Any Valve job means any angle on the valve seat or the valve it self and no more .250 under or above the seat, the .250 is omitted! __________________ Woodro Josey 2002 STK

11-14-2008, 03:56 PM	#3
Bruce Walton Junior Member Join Date: Jan 2003 Location: Mount Vernon, Ohio Posts: 4 Likes: 0 Liked 0 Times in 0 Posts	Re: Stocker Head Rule Change???? Thanks for the imput, but my son's teacher at UNOH is in the process of doing a couple pairs of heads for stockers that are running with NHRA this year. These heads ar suppose to be used in the 2009 NHRA season. I am just trying to find out if this teacher is telling the truth or if the stockers are just going to do this on their own! My son corredted me on one item-it is 170cfm's on the flow bench and not a 170 cc's. __________________ Bruce Walton 3715 STK Last edited by Bruce Walton; 11-14-2008 at 03:59 PM.

11-14-2008, 04:57 PM	#5
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: Stocker Head Rule Change???? Hilghly unlikely NHRA would have a blanket rule of "170 CFM" intake or even 170cc volume to cover all makes as there are many makes which exceed these numbers (both CFM & CC as delivered from Detroit. Also, highly unlikely NHRA would carry a flow bench with them to check flow. Now, would NHRA allow porting to published SS port volumes? That's more realistic but I would opinion highly unlikely. At least not in the near future... __________________ Jeff Lee 7494 D/S '70 AMX

11-14-2008, 04:59 PM	#6
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: Stocker Head Rule Change???? Looks like Chad and I were thinking and typing alike... __________________ Jeff Lee 7494 D/S '70 AMX

11-14-2008, 05:26 PM	#7
Bob Pagano VIP Member Join Date: Jun 2002 Location: New Holland, PA Mooresville,NC Posts: 1,163 Likes: 245 Liked 16 Times in 11 Posts	Re: Stocker Head Rule Change???? Jeff, Looks like Chad's reaction time was better than yours... :~) This sounds like some racers that have told the teacher what to do. I would be calling a Div Tech or national Tech dept to check this out if I were in his shoes. That sounds like too much departure from Stocker heads & current rules. More like Super Stock. Sure would surprise me if they (NHRA) allowed something like this. Adger Smith On Bob's sign in.... __________________ Bob Pagano A/SA

11-14-2008, 07:46 PM	#8
Tom Moock Senior Member Join Date: May 2004 Posts: 801 Likes: 1 Liked 10 Times in 6 Posts	Re: Stocker Head Rule Change???? Head rule for 2009, I was told they were not pouring intake or exhaust runner, and no specs, like super stock, They can pour runner if they want, no welding or grinding in ports, but no spec`s like SS for runner size, combustion chamber will checked per nhra rule. vavle rules same as 2008, But by 2010 they may change rules again, to SS runner size, you never known what they may do? Tom __________________ Tom Moock 5704 STK

11-14-2008, 09:21 PM	#10
Tom Moock Senior Member Join Date: May 2004 Posts: 801 Likes: 1 Liked 10 Times in 6 Posts	Re: Stocker Head Rule Change???? Hadtobethere; I was told SS number don`t apply, Mite there be lawyer`s involved head disqualificationin`s in divison 5? Tom __________________ Tom Moock 5704 STK