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What is stock head gasket thickness??

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Old Apr 10, 2002 | 05:10 PM
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Default What is stock head gasket thickness??

And what compression would going with a 6.0 truck head with a .075 thickness gasket give you for a FI setup? Thanks, <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
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Old Apr 10, 2002 | 05:14 PM
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Default Re: What is stock head gasket thickness??

Stock is ~ 55 thou crushed. The LQ9s are ~70 cc. adding that to a 10.0:1 car, makes it about 9.5, and for every 6 thou you add or take away on the head/gasket is worth about 1cc.

Louis
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Old Apr 10, 2002 | 07:40 PM
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Default Re: What is stock head gasket thickness??

I did not know the LQ9 head gasket was thicker.. Hmmmmm...

<small>[ April 10, 2002, 07:41 PM: Message edited by: VINCE ]</small>
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Old Apr 10, 2002 | 08:22 PM
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Default Re: What is stock head gasket thickness??

Vince...its not. Atleast not as far as I know. But I believe there are aftermarket head gaskets by Cometic up to .075 thickness.
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Old Apr 10, 2002 | 09:35 PM
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Default Re: What is stock head gasket thickness??

The 6.0L CC is only 1cc more than Stock LS1 heads. Cometic does make a .078 which I just finished installing. My LS1 Head C/R with the above gasket should be 9.6:1

It's 30% thicker than the stock gasket.

<small>[ April 10, 2002, 09:36 PM: Message edited by: MelloYellow ]</small>
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Old Apr 10, 2002 | 10:15 PM
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Default Re: What is stock head gasket thickness??

Yep .055" is what I get everytime I pull a LS1 down <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
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Old Apr 11, 2002 | 06:37 AM
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Default Re: What is stock head gasket thickness??

Thanks Al..
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Old Apr 11, 2002 | 08:15 AM
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Default Re: What is stock head gasket thickness??

I just recieved my cometic gaskets last weekend they look great I had been waiting for 8 weeks for them.
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Old Apr 17, 2002 | 09:00 AM
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Default Re: What is stock head gasket thickness??

Mello- do you have the part number for that gasket???

8 weeks????

ick.

<small>[ April 17, 2002, 09:03 AM: Message edited by: Kilroy's 99 TA ]</small>
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Old Apr 17, 2002 | 10:23 AM
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Default Re: What is stock head gasket thickness??

If you order direct from Cometic, you should get them VERY fast. Got mine in 3 days I believe.

The thicker you get, the more pricey they are. These are the same boost gaskets Lingenfelter uses on their twin turbo.

The p/n on my invoice is:
p/n H1294078S LS1 3.910" Bore .078" MLS
$125.95 Each x2
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Old Apr 17, 2002 | 06:09 PM
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Default Re: What is stock head gasket thickness??

Does Felpro make LS1 head gaskets? Are ARP head studs readily Available? Help, Anyone.
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Old Apr 17, 2002 | 10:50 PM
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Default Re: What is stock head gasket thickness??

Yes to both. I'd probably try the new GM 2002 MLS Gasket before the Felpro. I've seen some Felpro's fail on LS1's.
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Old Apr 18, 2002 | 05:44 AM
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Default Re: What is stock head gasket thickness??

Are GM MLS gaskets available seperate from kit?
Who sells them besides dealers? TIA
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Old Apr 18, 2002 | 07:48 AM
  #14  
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Default Re: What is stock head gasket thickness??

So assuming I wanted stock bore size, and one or two grades thicker, what would I ask for? I don't know what the stock thickness is for a regular 1999/2000 LS1 (2000 block, 1999 heads)
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Old Apr 25, 2002 | 01:51 AM
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Default Re: What is stock head gasket thickness??

I'm very interested as well, as I'm looking to increase Piston-to-Valve clearance--
Thanks--Matt
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Old Apr 25, 2002 | 01:37 PM
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Default Re: What is stock head gasket thickness??

Sorry-- it says above that stock is .055 <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
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Old Apr 25, 2002 | 07:48 PM
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Default Re: What is stock head gasket thickness??

I believe the stock LS1 compressed head gasket thickness is 1.33 mm or 0.0524". <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Eric
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Old Apr 25, 2002 | 10:48 PM
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Default Re: What is stock head gasket thickness??

FWIW,

No detonation issues or throttle response problems with the new .078" gasket. Car feels great! Hard to notice a 2% loss @ 9.6:1. No direct ATAP results yet. Will pull the data soon.
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