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Author
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Topic: copper head gaskets
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5.0mustang5speed
Journeyman Posts: 29
From: oklahoma
Registered: Nov 2005
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posted 11-25-2005 01:47 AM
   
im thinking about using copper head gaskets to lower my compression, i looked at 3 different brands and all say that the block or heads needs to be o-ringed, is this true
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Moneymaker
Administrator Posts: 26922
From: Lyons, IL, USA
Registered: May 99
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posted 11-25-2005 11:29 AM
Yes. With copper head gaskets you need to o-ring the block and have receiver grooves in the heads.
A better solution is to order custom thickness gaskets from Cometic.
Expensive, but cheaper and easier in the long run.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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5.0mustang5speed
Journeyman Posts: 29
From: oklahoma
Registered: Nov 2005
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posted 11-25-2005 12:02 PM
how thick can i get them, im hung up on the idea of getting my motor down to 10-1, from 11-1, and i seen that with cooper thye have them at .080 thick, which accoring to the compression calucator would do the job
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Moneymaker
Administrator Posts: 26922
From: Lyons, IL, USA
Registered: May 99
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posted 11-25-2005 12:09 PM
As thick as you want.
They are MLS and they build htem to spec.
I beleive they have a part number for .100 that is ready to ship.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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V8 Thumper
Gearhead Posts: 4663
From: Phoenix, Arizona
Registered: Dec 2001
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posted 11-25-2005 12:30 PM
They don't give those things away  but they are of the highest quality. I run them on my motor (on Alex's recommendation, thanks again for the tip  ) and with 7/16" bolts (not studded) and 7k shifts have never had a head gasket problem. ------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9" 12.58/110 on street tires, more to come;) All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html
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5.0mustang5speed
Journeyman Posts: 29
From: oklahoma
Registered: Nov 2005
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posted 11-25-2005 05:44 PM
do they have a web site
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5.0mustang5speed
Journeyman Posts: 29
From: oklahoma
Registered: Nov 2005
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posted 11-25-2005 05:59 PM
i went to the site, i can get a custom gasket up to 0.120 thick, that would bring my compression way down, to about 9 or lower, which is great, now is that a good way to lower the compression
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COBRAII7678
Gearhead Posts: 108
From: Festus Mo U.S.A
Registered: Sep 2004
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posted 11-25-2005 08:22 PM
quote:
Originally posted by 5.0mustang5speed:
i went to the site, i can get a custom gasket up to 0.120 thick, that would bring my compression way down, to about 9 or lower, which is great, now is that a good way to lower the compression
Considering the options thats what I would do.
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9sec65stang
Journeyman Posts: 37
From: mehlville / st.louis mo
Registered: Jan 2005
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posted 11-26-2005 02:18 PM
felpro makes them also and cheaper and i have 16 to 1 compression and no problems
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5.0mustang5speed
Journeyman Posts: 29
From: oklahoma
Registered: Nov 2005
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posted 11-26-2005 04:05 PM
do they make one that is .120 thick
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Bloose
Gearhead Posts: 773
From: Milwaukee, WI
Registered: Dec 2001
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posted 11-28-2005 09:38 PM
quote:
Originally posted by 5.0mustang5speed:
i went to the site, i can get a custom gasket up to 0.120 thick, that would bring my compression way down, to about 9 or lower, which is great, now is that a good way to lower the compression
The only problem with this approach is you could lose your quench area. I don't remember the exact numbers you are looking for but if your make the clearence of the quench area too big you actually hurt your octane tolerence. In other words, you may have more detonation problems at 9:1 and a large quench area than at 10:1 and tight quench. HTH,
B-loose
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