Stocker Cylinder Heads....

[jmantle]

Originally Posted by Adger Smith

Bill, I have been told that as long as it swings around the guide C/L it will pass.
There seems to be no depth numbers any more. Let me qualify the above statement with "AS OF" July 2014. Rules can be a moving target you better call someone with a little more authority than this message board.

This is my understanding of the rule. As there is nothing in the rulebook saying you can't cut the manifold face in stock, if the bottom cut takes you over the maximum cc's, it's not hard to fix. I had suggested NHRA add something in the rulebook about not cutting the manifold faces but was shot down on that one. It would be interesting to know how many of the "expensive" heads have had the faces cut.

Jim Mantle V/SA 6632

[Bill Diehl]

Originally Posted by jmantle

This is my understanding of the rule. As there is nothing in the rulebook saying you can't cut the manifold face in stock, if the bottom cut takes you over the maximum cc's, it's not hard to fix. I had suggested NHRA add something in the rulebook about not cutting the manifold faces but was shot down on that one. It would be interesting to know how many of the "expensive" heads have had the faces cut.

Jim Mantle V/SA 6632

can't cut past the valve cover bolt holes the way I read it

[Adger Smith]

Bill, if it has had any angle milling at all the face needs to be milled to get the angle corrected. Even flat milling the head the intake surface needs milling for the intake to fit in the valley. I would say the odds are pretty good that there are very few that haven't had the intake surface milled.

[Lou Jeffery]

The basics of Fast stocker cylinder heads are very simple. If you consider each intake port and exhaust port assembly as a orifice you can flow them with a constant draw and establish an effective orifice size. There are endless ways to change or improve flow. The only way to significantly improve flow is to change the effective orifice size of the assembly by porting!
Stop lying to yourselves and Stop pushing NHRA to police something that is out of control. If NHRA were to throw out ALL modified stocker heads the pits would be empty. I know I know it's only the other guys that would stoop to cheating NOT YOU!
Just buy the $1000 cast iron intake and the $3500 heads and have fun like MANY others do. Louis Jeffery

[dennis dunlap]

All this just reminds me of the letter I got from nhra several years ago after being pitched out.... after further review ect ect... what's right?????? Sounds like my x_ wife...... I'm done thanks

[brent flynn]

Originally Posted by Lou Jeffery

The basics of Fast stocker cylinder heads are very simple. If you consider each intake port and exhaust port assembly as a orifice you can flow them with a constant draw and establish an effective orifice size. There are endless ways to change or improve flow. The only way to significantly improve flow is to change the effective orifice size of the assembly by porting!
Stop lying to yourselves and Stop pushing NHRA to police something that is out of control. If NHRA were to throw out ALL modified stocker heads the pits would be empty. I know I know it's only the other guys that would stoop to cheating NOT YOU!
Just buy the $1000 cast iron intake and the $3500 heads and have fun like MANY others do. Louis Jeffery

Not true, Louis, my slow E/Stocker would still be there, watching tumbleweeds blow across the staging lanes, as i take a final bye run pass, and pull up to the Winner's Circle to accept my Wally... hehe

[James L Miller]

I'm looking at building a "killer?" 318 2bbl combo with the 302 swirl port heads. It sounds like I can use a bowl hog and go all the way down to the valve guides as part of the valve job? Or maybe use a Serdi type cutter with a radius at the bottom of the cutter to open up the bowl as long as it's done all the way around?

When did they get rid of the .250" depth cut limitations? I guess I haven't been paying attention to the rules.

I also saw the 308 360 head was legal but needs to have the smaller 318 valves put into it. I guess with the VJ changes that opens up another possibility with new seats and whatever VJ works. It may not make much difference with the tiny BBD 2bbl carb?

[Billy Nees]

Originally Posted by James L Miller

I'm looking at building a "killer?" 318 2bbl combo with the 302 swirl port heads. It sounds like I can use a bowl hog and go all the way down to the valve guides as part of the valve job? Or maybe use a Serdi type cutter with a radius at the bottom of the cutter to open up the bowl as long as it's done all the way around?

When did they get rid of the .250" depth cut limitations? I guess I haven't been paying attention to the rules.

I also saw the 308 360 head was legal but needs to have the smaller 318 valves put into it. I guess with the VJ changes that opens up another possibility with new seats and whatever VJ works. It may not make much difference with the tiny BBD 2bbl carb?

You just may find that when dealing with seriously restricted combos(I think that a 2V 318 qualifies even though that carb flows more than what I'm used to) you might want to be looking for the smallest runners. Velocity is your friend not necessarily volume. The manufacturers didn't spend lots of time and money coming up with those swirl port heads just as an engineering exercise.

[HandOverFist]

Originally Posted by brent flynn

Not true, Louis, my slow E/Stocker would still be there, watching tumbleweeds blow across the staging lanes, as i take a final bye run pass, and pull up to the Winner's Circle to accept my Wally... hehe

You would have me there to race Brent.

[Dan Fahey]

Had to revive this post.
It was interesting and no jabs taken.

Saw a web site on a S/SS head machinist named Tommy Sizemore.
Then checked his references on Internet.
Is this guy good or not?