Which Cometic head gaskets for basically stock LS1?
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From: C. V., Kalifornia
Which Cometic head gaskets for basically stock LS1? Which Cometic head gaskets do I need for my basically stock LS1 with AFR205's ?
BTW, I'm not looking to bump up/lower the compression ratio.
Is pt#C5475-51 what I need ?
BTW, I'm not looking to bump up/lower the compression ratio.
Is pt#C5475-51 what I need ?
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Hell, that's a lot of money to spend if you're not even going to take advantage of the thinner gaskets cometic offers, plus you have to worry about having a PERFECTLY smooth block. Have you thought about just going with something like what SDPC offers:
http://sdparts.com/details/gm-perfor...parts/12498544
They're only around $29 for a set too!
http://sdparts.com/details/gm-perfor...parts/12498544
They're only around $29 for a set too!
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From: C. V., Kalifornia
Hell, that's a lot of money to spend if you're not even going to take advantage of the thinner gaskets cometic offers, plus you have to worry about having a PERFECTLY smooth block. Have you thought about just going with something like what SDPC offers:
http://sdparts.com/details/gm-perfor...parts/12498544
They're only around $29 for a set too!
http://sdparts.com/details/gm-perfor...parts/12498544
They're only around $29 for a set too!
Good info thanks!
^Agreed - big waste of money IMO to go with a stock thickness gasket when you could just buy GM MLS ones for over $100 less. I would go with the cometic 0.040" with your 205's. That's what I did and with the heads milled to 62cc I'm around 11.4:1 compression. I burn 91 octane with no problems.
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I also use .04 Cometics with my 205s. No problems with them since they were installed in 2005.
I have a new set that I bought before I knew that I needed to increase the bore size to 4.130 when Tony ported my heads. The new Cometics set is a 3.910 bore at .040. I'll sell them for $100 + shipping if anyone is interested.
I have a new set that I bought before I knew that I needed to increase the bore size to 4.130 when Tony ported my heads. The new Cometics set is a 3.910 bore at .040. I'll sell them for $100 + shipping if anyone is interested.
Last edited by GTO1_OHIO; Apr 26, 2010 at 09:49 PM.
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Yeah man don't spend the big dough on Cometics if your not gonna get the added benefit of a tighter quench and slightly more compression.
As far as sealing goes I never had a problem with my Cometics at all. I plan to use them on my new build as well.
As far as sealing goes I never had a problem with my Cometics at all. I plan to use them on my new build as well.
If your set up is pretty mild going with stock graphite head gaskets is a good option. That's what your car came with and they seal very well. MLS do require a very clean and flat surface but the graphite is a lot more forgiving. It takes more work to clean the graphite off the block when you swap but it's not a big deal.
http://sdparts.com/details/gm-perfor...parts/12498543
http://sdparts.com/details/gm-perfor...parts/12498543
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From: Anaheim Ca.
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Joined: Oct 2008
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From: Anaheim Ca.
I also use .04 Cometics with my 205s. No problems with them since they were installed in 2005.
I have a new set that I bought before I knew that I needed to increase the bore size to 4.130 when Tony ported my heads. The new Cometics set is a 3.910 bore at .040. I'll sell them for $100 + shipping if anyone is interested.
I have a new set that I bought before I knew that I needed to increase the bore size to 4.130 when Tony ported my heads. The new Cometics set is a 3.910 bore at .040. I'll sell them for $100 + shipping if anyone is interested.
