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 Post subject: Re: Cylinder Heads.
PostPosted: Sun Dec 06, 2009 11:57 pm 
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Joined: Tue Sep 15, 2009 8:54 am
Posts: 315
They don't break when you have a new unmolested set. 5k at least for an NOS set if you can find them.They break because they have been through the ringer. They are known for dropping valves, which means welding and a new seat. and that equals JUNK. The valvetrain parts weren't very good back then , that stuff is changed anyway. No advantage and no more durable.


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 Post subject: Re: Cylinder Heads.
PostPosted: Sun Dec 06, 2009 11:59 pm 
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Joined: Wed Jul 30, 2008 11:21 pm
Posts: 242
I beleive they are discussing certifiable cars having non original casting heads on an approved list. Not that said car would not be able to be certified if they used the approved heads?
i agree if i can race more because my heads arent blown up i can make more passes and tune the car more. I also can afford to continue to race the car. so that is a performance advantage of such


I am sure there might be a easier to obtain oem replacement pontiac/ford/olds/buick head out ther for a certain build? Cant just be chevy??


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 Post subject: Re: Cylinder Heads.
PostPosted: Mon Dec 07, 2009 12:07 am 
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Posts: 315
Leave the rule as is. If you run a good ET or set a record :runaway , then someone will always put an asterisk by you name .

If nothing else it will make you work harder.


Anyone out there looking for a specific head/heads and not having any luck, email the info and I will check around my side of the border. I have some really good mopar connections too. SHHHH don't tell anyone. :sick

mfchassisworks@live.ca


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 Post subject: Re: Cylinder Heads.
PostPosted: Mon Dec 07, 2009 4:39 pm 
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Joined: Fri Jul 25, 2008 12:26 am
Posts: 6720
Location: Bristol CT
It seems that people are hung up on the 077 being more reliable.

I have a question to ask all of you. What if like the Chrysler Hemi Head, GM introduced a correct OEM part number, exact duplicate aluminum ZL1 head to be sold new through any GM dealer. The part number 074 is correct, the casting is similar if not the same, BUT all new aluminum. Better than the quality used in 1969.

Answer this question, do we allow this head to be legal? YES or NO

_________________
SUPERCAR LEGAL

66 Belvedere I HP2 Hemi Auto 11.13 @ 124MPH 1.68 60' S/A

70 RoadRunner 440+6 Auto 11.21 @ 124MPH 1.72 60' S/A

70 RoadRunner Hemi Auto 12.39 @ 113MPH 1.90 60' S/A

71 GTX 440+6 Auto 11.35 @ 123MPH 1.79 60' S/A

71 RoadRunner 440+6 4Spd 13.61 @ 101MPH 1.99 60' P/S

72 Demon GSS 340 S/A 11.81 @ 118MPH 1.91 60' S/A


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 Post subject: Re: Cylinder Heads.
PostPosted: Mon Dec 07, 2009 5:12 pm 
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Joined: Tue Sep 15, 2009 8:54 am
Posts: 315
If there is a reproduction with same casting number made available by the manufacturer, then that should be considered legal.

Doesn't help me OH well :(


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 Post subject: Re: Cylinder Heads.
PostPosted: Mon Dec 07, 2009 6:32 pm 
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Joined: Fri Jul 25, 2008 12:26 am
Posts: 6720
Location: Bristol CT
Lane, what is your oppinion on allowing Factory Correct CAST IRON Heads with no added performance advantages as direct replacements to the originals. I ask this question to anyone who has an oppinion like Jeremy and the others that have answered this question. Please chime in :argue :pop .

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SUPERCAR LEGAL

66 Belvedere I HP2 Hemi Auto 11.13 @ 124MPH 1.68 60' S/A

70 RoadRunner 440+6 Auto 11.21 @ 124MPH 1.72 60' S/A

70 RoadRunner Hemi Auto 12.39 @ 113MPH 1.90 60' S/A

71 GTX 440+6 Auto 11.35 @ 123MPH 1.79 60' S/A

71 RoadRunner 440+6 4Spd 13.61 @ 101MPH 1.99 60' P/S

72 Demon GSS 340 S/A 11.81 @ 118MPH 1.91 60' S/A


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 Post subject: Re: Cylinder Heads.
PostPosted: Mon Dec 07, 2009 6:59 pm 
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Posts: 315
Nhra has a list of cylinder heads that are acceptable for all brands as replacements. They have spent more time and money compiling an unbiased list and the racers in Stock take it seriously so I doubt anything fell through the cracks.

Here is our application 1969 427 425hp L72

425 427 .008 Dome w/n .309" 34.00 cc 2195/1725 520/520 Outer w Damp* .028 840,291,858,391 Iron

Accepted replacements in bold. That doesn't help much but it at least give us an option.

Here is the link for all makes:

http://www.nhra.net/tech_specs/engine/index.html


Last edited by MFChassisworks on Tue Dec 08, 2009 12:42 am, edited 1 time in total.

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 Post subject: Re: Cylinder Heads.
PostPosted: Mon Dec 07, 2009 11:31 pm 
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Joined: Tue Oct 27, 2009 12:00 am
Posts: 342
Location: Chicopee MA
I thought everyone was using aftermarket or repro style heads to make the times happen. I think if it is of similar material and appearance the heads should be considered for use to get a person up and running. Were would my stage 5 mopar heads fit into this situation. :bang I'm not making killer times but would like to stay within the rules.


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 Post subject: Re: Cylinder Heads.
PostPosted: Tue Dec 08, 2009 12:40 am 
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Joined: Mon Jul 27, 2009 9:06 am
Posts: 214
If they start making the 074 heads they should definitely be legal. :mrgreen:


---------------
John Slavin
1969 L78 Camaro


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 Post subject: Re: Cylinder Heads.
PostPosted: Tue Dec 08, 2009 8:36 pm 
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Joined: Fri Jul 25, 2008 12:26 am
Posts: 6720
Location: Bristol CT
gtxjimmy wrote:
I thought everyone was using aftermarket or repro style heads to make the times happen. I think if it is of similar material and appearance the heads should be considered for use to get a person up and running. Were would my stage 5 mopar heads fit into this situation. :bang I'm not making killer times but would like to stay within the rules.


Jimmy your good! The E/T's your running don't warrant you to have correct casting numbers. You need to look somewhat correct but don't have to worry. For your car to be certified you would need to run the correct 1971 casting head. Your Stage Fives are OK for the E/T your running. Continue to come out and have fun :winner

_________________
SUPERCAR LEGAL

66 Belvedere I HP2 Hemi Auto 11.13 @ 124MPH 1.68 60' S/A

70 RoadRunner 440+6 Auto 11.21 @ 124MPH 1.72 60' S/A

70 RoadRunner Hemi Auto 12.39 @ 113MPH 1.90 60' S/A

71 GTX 440+6 Auto 11.35 @ 123MPH 1.79 60' S/A

71 RoadRunner 440+6 4Spd 13.61 @ 101MPH 1.99 60' P/S

72 Demon GSS 340 S/A 11.81 @ 118MPH 1.91 60' S/A


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 Post subject: Re: Cylinder Heads.
PostPosted: Wed Dec 09, 2009 8:39 am 
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Joined: Fri Jul 25, 2008 6:12 pm
Posts: 2455
Location: North Salem NY
RalphsRapidTransit wrote:
It seems that people are hung up on the 077 being more reliable.

I have a question to ask all of you. What if like the Chrysler Hemi Head, GM introduced a correct OEM part number, exact duplicate aluminum ZL1 head to be sold new through any GM dealer. The part number 074 is correct, the casting is similar if not the same, BUT all new aluminum. Better than the quality used in 1969.

Answer this question, do we allow this head to be legal? YES or NO


so mopars biggest and badest has a repro of its head, and its ok to use, but gm has the 077 (aluminum), or the 188 (iron) (open chamber)and we cant use them? did someone say advantage?

seems like chevy is at a disadvantage because they didnt stick with a single part number over many years!

my question to anyone against using oem /non vintage/ non perf.gain / heads.....

Would you rather win a race because your opponent broke, or because you out powered or out drove him?

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69 Nova SS 396 L89
10.74 130.34


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 Post subject: Re: Cylinder Heads.
PostPosted: Wed Dec 09, 2009 10:29 am 
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Joined: Mon Jul 27, 2009 9:06 am
Posts: 214
Ted raises a good point. Finding a decent set of GM heads, whether iron or aluminum, is getting rare and seriously expensive.
To drift off the head topic, NHRA allows Jerico transmissions to replace Muncie in stock class. All something to consider.


--------------
John Slavin
1969 Camaro L78


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 Post subject: Re: Cylinder Heads.
PostPosted: Wed Dec 09, 2009 4:17 pm 
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Posts: 618
Location: Watertown,Ct.
:lol: , A Jerico would cost more than my car is worth. Only kidding my car is priceless, but, as far as the head topic goes, I would leave it alone. Once "WE" start changeing the rules for heads, next year willl be for intakes, than after that it will be back on the poly -slicks and then back with the trunk-junk issue. Did we all have fun this year??? Any new records??? winter just started, so get too tuneing lose some weight and see ya in the spring. MERRRY CHRISTMAS / HAPPY NEW YEAR. maybe I'll get a new combo from santa :stir

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454 (LS-5) 4spd


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 Post subject: Re: Cylinder Heads.
PostPosted: Wed Dec 09, 2009 4:57 pm 
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Joined: Fri Jul 25, 2008 12:26 am
Posts: 6720
Location: Bristol CT
Mike Derasmo wrote:
Did we all have fun this year??? Any new records???


Can't argue with that!

_________________
SUPERCAR LEGAL

66 Belvedere I HP2 Hemi Auto 11.13 @ 124MPH 1.68 60' S/A

70 RoadRunner 440+6 Auto 11.21 @ 124MPH 1.72 60' S/A

70 RoadRunner Hemi Auto 12.39 @ 113MPH 1.90 60' S/A

71 GTX 440+6 Auto 11.35 @ 123MPH 1.79 60' S/A

71 RoadRunner 440+6 4Spd 13.61 @ 101MPH 1.99 60' P/S

72 Demon GSS 340 S/A 11.81 @ 118MPH 1.91 60' S/A


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 Post subject: Re: Cylinder Heads.
PostPosted: Wed Dec 09, 2009 5:31 pm 
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Joined: Wed Jul 30, 2008 3:43 pm
Posts: 40
Location: Oreland, PA.
If a company made a replacement head that looked like, weighed like, and offered the same level of performance as the OEM head, to the point where you could call it a reproduction head, use it. That way we would not have to rely on 40 year swap meet parts.

With regards to the Ford FE heads, they are all about the same. Some are a little better than others in their unported state, but none is hugely superior over the others (excluding Tunnel Ports and High Risers, which are'nt right for anything here anyway). They all require a lot of reworking to get even close to you BBC and Hemi guys. So it comes down to a casting number question. Is that head correct for that Year/Model Ford? It would be nice to be able to start with a less expensive casting, which you are going to pay to have heavily ported, rather than seeking out the more expensive Cobra Jet castings that the numbers guys are all after.

What we FE Ford guys need are Blocks that are'nt so thin that they are considered marginal at best, and still cost a fortune. I know, you only want to talk heads here. But consider this, once you start down this road, where will it stop? On the flipside, I am in favor of anything that keeps guys racin'. Nobody wants to be constantly spending money to fix broken parts. Lord knows Lane has paid his dues and then some.

Lastly, Ryan wrote:
Geee if fords dont have aluminum heads maybe you could build a chevy if you think thats such a great thing?? Last i recall all valid sources will tell you cast iron heads can and will make more power!

Are you serious? Last I checked aluminum was a lot lighter than cast iron. :shrug

Mike

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"old cars have soul"


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