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  #16 (permalink)  
Old 10-16-2011, 01:29 PM
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Price for the head gaskets is not an issue for me. I would want as close to 0.040" quench as possible so the 1094s would be the the thinnest option as long as they work with aluminum heads. Those are all great suggestions, Cobalt, but at 0.028" thick they would still leave me with a wide quench and at that thickness I could get an MLS performance gasket that would be a better sealing gasket. I'm thinking it is probably best at this point to contact Fel Pro with this situation and find out what they reccomend as far as using a 0.015" rubber coated shim gasket such as the 1094. If I am unable to use this gasket then I guess I will go with the thinnest MLS (0.028" IIRC) and just live with the wider quench. I wonder what kind of gaskets the aluminum headed production engines use such as LS series and what not.

Keith

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Old 10-17-2011, 08:12 AM
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You can also check with Cometic to see what's the thinnest MLS or Composition available.
http://www.cometic.com/custom.aspx

I think the LS engines use a .051" MLS type gasket.
The ZZ4 also uses a .051" MLS with the 58cc alum. Heads.

.028" may be the thinnest MLS available.

Last edited by SSedan64; 10-17-2011 at 08:18 AM.
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  #18 (permalink)  
Old 10-17-2011, 10:46 AM
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Quote:
Originally Posted by oldbogie
X2 on Cobalt's gasket recommendations...
I should have noted that those part numbers originally came from a post of yours. After verification (which wasn't needed except to check for typos) I repeated them here.
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Old 10-18-2011, 07:59 PM
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I have contacted Cometic to see what they can come up with. Something else did come to mind, however, as we are talking about quench. With the belief that running anything lower than 0.035" quench could result in piston to head contact when things warm up and speed increases, wouldn't that also change your compression ratio under these conditions? I mean you are technically loosing 0.035" of space above the piston if you are getting contact under these certain conditions. Using a compression calculator and subtracting say 0.035" of space between the piston and heads will change the ratio a damn lot!! Just something to think about......
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