Re: Stocker Cylinder Heads....
 

Bump, this is 2 years old now.....so how far down with the cutter can we go? on both ends of the job?

Are they going by looks, feelings, a measurement or who you are?

Re: Stocker Cylinder Heads....
 

Ask your division tech people.

Re: Stocker Cylinder Heads....
 

It is Indy that I am concerned with

Re: Stocker Cylinder Heads....
 

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.

Re: Stocker Cylinder Heads....
 

Good call. Come out of nowhere and be fast at Indy. That is cool,but it is a lock for getting invited to the dance. Seen it many times. Most of the time it works out. Most of the time....

Re: Stocker Cylinder Heads....
 

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

Re: Stocker Cylinder Heads....
 

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

Re: Stocker Cylinder Heads....
 

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.

Re: Stocker Cylinder Heads....
 

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:D

Re: Stocker Cylinder Heads....
 

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:confused: