Hemi piston pop-up

[HankN]

We has the rule book and Pat C don’t answer.
That’s why I ask here at CR.
My Swedish good ’byddy’ cost me allot before.
I asked Don Little over mail on aluminium heads but no reply back for 4 month.
Maybe he is more into super S theese days.

[Rory McNeil]

I can not offer any input to your Hemi engine question, but since you say this car was a 440-6 barrel car from Div. 6, do you have Wes Libbys old Dodge Challenger ? I have not seen Wes or the Challenger in at least 10 years, so the timeline fits.

[HankN]

Lets see if someone know who read this.
This is the car.
https://www.dragracing.eu/driver.asp?id=313

[HankN]

A update.

So far nothing from NHRA tech about this.
Tested several tech directors but voice message and I send message and mail, but so far nothing back.
But I did get from tech director Pat C a answer, but it was no answer on the gasket issue on AB motors but he said still the bigger cam tunnels is not Ok in stock and has not been, will not be.
If one read the rule book he seem's correct.
-On the gasket issue I can't see a rule.

I guess one has so to do what one will do here.

[HankN]

Now I got in contact with west central div and I was all Ok with the thicker gasket.
So now that is cleared out, but..
From Pat C I got a mail today, and if that is correct understood he said he asked every full time NHRA tech official, and all have said it’s not legal.
If that was meant on bigger cam tunnels or thicker gaskets it’s not said, or maybe he mean both.
It's all very confusing.
Why is this not cleared out in the rulebook.

One wonder if roller lifters is coming to stock now 2020.
RPM from heads flow, free seats, free valevesprings, roller rockers, fat cams, more oil in pan, aftermarket parts and new rods/piston that handle it.

Dan Dvorak was years ago into put stock in specs of comp/cam and let rest be free ( not titanium ) and use a OEM intake but aftermarket heads to get it more easy.

[James L Miller]

"GASKETS Any replacement or aftermarket gasket permitted. If thinner-than stock head gaskets are used, thickness loss must be made up with additional deck clearance. Difference in deck clearance can also be made up using thicker-than-stock head gaskets."

I would interpret this to include a negative deck clearance for the Hemi.

[HankN]

Yes, but the same thing happens to me 2005.

But as I got OK now ( atleast from Div 5 tech dir ) but I wanted this on a written document from NHRA, and who is the boss = Pat C and if I read him correct this is not OK. ( asked twice )

I don’t like to get into the same issue as before as my buddy here with CA connections said thicker gaskets/more deck was not OK in a AB motor.

When this was redone ( did cost me $$$ ) so Don Little later on used std steel gaskets and a pop-up less the 0.536”, so I has thought this was the case as in a AB ( Hemi ) we could not go Cometics ( as I did like and had done former )

This new block was hard to get and also expensive so I don’t like mess it up in deck and get this ’buddy’ after me again.

You know, over here the tech is the people involved - like the ”peoples voice” whos OK or not OK.

One can of course not talk or do whatever one like but I like had it all after book and use correct numbered parts.

For me that is what stock class racing is about.


Now as told Mopar will not make the alu heads further on but I got me a set and from distributor was said - maybe the very last set.
-Going Hemi is not easy.

[James L Miller]

Edelbrock was making the 110-M heads for Mopar, so they have the molds. Mopar might have to approve them or Edelbrock could submit a replacement head on their own and leave off the Mopar part number. I had not heard that they've ended the production of the aluminum heads, but that wouldn't surprise me. Good luck with the Hemi build.