Hemi piston pop-up

Tom Broome · 11-01-2019, 07:21 PM

Quote:

Originally Posted by Race Clean

As I understand the rule as it once where "if it sticks out of the hole you can't compensate for the gasket" as you can if it's down in the hole.
I could be wrong, it may have changed, or they dont care.

I agree on all points.

I haven't had to worry about dome height for quite a while. But as I recall it was "above deck"......nothing said about gaskets.
Apparently no one that currently races one of these combinations wants to give any "tips".

HankN · 11-01-2019, 08:32 PM

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 · 11-02-2019, 02:47 AM

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 · 11-02-2019, 09:11 AM

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

HankN · 11-05-2019, 08:18 AM

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 · 11-06-2019, 01:26 PM

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 · 11-07-2019, 02:17 PM

"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.

11-01-2019, 08:32 PM	#2
HankN Junior Member Join Date: Jul 2019 Posts: 18 Likes: 0 Liked 3 Times in 3 Posts	Re: Hemi piston pop-up 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.

11-02-2019, 02:47 AM	#3
Rory McNeil VIP Member Join Date: Jun 2007 Location: from Vancouver BC Canada, now in Nova Scotia Posts: 1,311 Likes: 317 Liked 1,103 Times in 301 Posts	Re: Hemi piston pop-up 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. __________________ NHRA 6390 STK M/S 85 Mustang

11-02-2019, 09:11 AM	#4
HankN Junior Member Join Date: Jul 2019 Posts: 18 Likes: 0 Liked 3 Times in 3 Posts	Re: Hemi piston pop-up Lets see if someone know who read this. This is the car. https://www.dragracing.eu/driver.asp?id=313

11-05-2019, 08:18 AM	#5
HankN Junior Member Join Date: Jul 2019 Posts: 18 Likes: 0 Liked 3 Times in 3 Posts	Re: Hemi piston pop-up 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.

11-06-2019, 01:26 PM	#6
HankN Junior Member Join Date: Jul 2019 Posts: 18 Likes: 0 Liked 3 Times in 3 Posts	Re: Hemi piston pop-up 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.

11-07-2019, 02:17 PM	#7
James L Miller Member Join Date: Apr 2005 Posts: 494 Likes: 6 Liked 25 Times in 16 Posts	Re: Hemi piston pop-up "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. __________________ Mopar 2 Ya!