Approval of Super Stock Class Aftermarket Cylinder Heads

[Alan Roehrich]

The edit came when it struck me how far off you were from the point I was making in the post. I struggle every day trying to find parts, much less afford them, so that I can keep people racing. It's the same with every person I know in this business, especially those who are supporting class racing.



Class racing is like the Republic, it's dead if we all let it die. Class racing can survive. Hopefully the Republic can as well.



I've never been one to be concerned about the cost of a paint job, the size of a rig, or the price on a store bought car or engine. I don't judge anyone that way. I've never understood the fixation with "how much the other guy has". It ain't how I measure people, and it ain't how I compete.



I've been treated quite well by a lot of wealthy people in racing, a lot of successful racers, and some who are both. I've been treated well by people faster than us, and by people slower than us. I can say that I have been made to feel I belong, by people in racing who could lose the entire sum of my life's earnings and possessions, and not even miss it.


Sorry, those people ain't my enemies, and most of them ain't the source of my problems, or the problems faced by class racing, or the Republic. I've got more important things to worry about. You can go right on hating on whoever you want to.

[SBillinson]

The way I see it, for super stock only, if the follow criteria are met, what difference does it make to approve a raw casting?

Correct valve angle
Correct valve placement
Correct port heights
Correct chamber design
Correct CCs

What am I missing?

For those who may think the existing NHRA aluminum heads somehow better represent the factory heads they're replacing, send them to me and give me two days with a tig torch.

[Don Kennedy]

Originally Posted by SBillinson

The way I see it, for super stock only, if the follow criteria are met, what difference does it make to approve a raw casting?

Correct valve angle
Correct valve placement
Correct port heights
Correct chamber design
Correct CCs

What am I missing?

For those who may think the existing NHRA aluminum heads somehow better represent the factory heads they're replacing, send them to me and give me two days with a tig torch.

"What am I missing?" The NHRA-APPROVED casting number by NHRA

[SBillinson]

Originally Posted by Don Kennedy

What am I missing? The NHRA-APPROVED casting number by NHRA

That's it? You trying to protect that Pontiac head?

[Don Kennedy]

Originally Posted by SBillinson

That's it? You trying to protect that Pontiac head?

Correct
the correct part number and casting number for the NHRA-approved Pontiac head part number is 60587, and the casting number is 6058. The casting number is inside the valve cover near the middle head bolt 6058

[PONTIAC'S REVENGE]

Guys,
There's a supply issue with everything now my biz and everyone is suffering those pains. We have been getting valves, just takes longer but can't get hollow stems. Took me almost a year to get titanium for my modified engine.
Opening up the rules to brand x castings isn't the answer. That just gives unfair advantages without proper vetting. I say go thru approval process like always is fair and necessary.
Part numbers need to be maintained and enforced!
There's way more going on with the aluminum heads being used that some people dont understand. We engineer engines and cast cylinder heads and intakes and trust me there's certain rabbit hole you don't wanna START!!
Blessings!!

[SpeierRacing]

Let's use the Chevy aftermarket heads as an example since they are popular.

How much power do some of you guys think the aftermarket heads are making vs the OEM? And with the weight add, is it still worth ET?

[SBillinson]

Originally Posted by Don Kennedy

Correct
the correct part number and casting number for the NHRA-approved Pontiac head part number is 60587, and the casting number is 6058. The casting number is inside the valve cover near the middle head bolt 6058

I was just teasing you.

I've always liked your car and followed GT/EA (GT/AA) pretty closely for years.

The good news is that from what I can tell they're looking to get the head approved presumably with an NHRA casting number.

My point was, if the valves, ports and chambers are correct after porting, what possible reason could there be to not approve it?

Admittedly, a thicker casting could be used to create a much better port shape. But, that could also be achieved with grinding and filler rod in an approved head.

I have no investment in this argument. I genuinely couldn't care less. It just seems to me that a porter's casting could alleviate a lot of headaches and actually cost less to port in the long run.

I also see the other side of the argument, in that it could lead to an argument for billet heads down the road, which would go beyond what many consider a class that has already gone way too far.

[SpeierRacing]

To clear up what we had in mind, the NHRA logo, it’s own part number, TRUE oem valve spacing, and available to whoever through multiple sources.

But it’s all good!

[Don Kennedy]

Originally Posted by SBillinson

I was just teasing you.

I've always liked your car and followed GT/EA (GT/AA) pretty closely for years.

The good news is that from what I can tell they're looking to get the head approved presumably with an NHRA casting number.

My point was, if the valves, ports and chambers are correct after porting, what possible reason could there be to not approve it?

Admittedly, a thicker casting could be used to create a much better port shape. But, that could also be achieved with grinding and filler rod in an approved head.

I have no investment in this argument. I genuinely couldn't care less. It just seems to me that a porter's casting could alleviate a lot of headaches and actually cost less to port in the long run.

I also see the other side of the argument, in that it could lead to an argument for billet heads down the road, which would go beyond what many consider a class that has already gone way too far.

If NHRA allows this then Cubic Money will prevail like most $30,000 for a set of heads would be the norm,