Quote:
Originally Posted by vettestr
Hey Don,
In the end you have to do what you feel good about and I appreciate that fact. Just a couple of items to throw into the mix for you. I ran copper gaskets for years on my supercharged engines but have been using Cometic layered gaskets with great luck and highly suggest you check them out. They will supply about any compressed thickness you need. I run them in an alum BBC with 11.72 compression on pump gas and 39 degrees total timing. I have a knock sensor to be sure but no pre-ignition problems at all.
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Interesting you mention this as I was actually going to use a thicker .064 head gasket to lower the compression down to around 10.6:1 but now I've been told that a
thicker gasket might actually increase the chances of detonation as the engine tolerates detonation best in the .035 to .045 deck range. so the .040 gasket would be the best choice with my 0 decked block.
This is new information to me but the source sounded very knowledgeable and experienced so now I am probably sticking with the .040 gasket as originally planed or perhaps go to the cometic as you mentioned. but I think their gasket are .050 unless ordered custom. I'll check into that.
I was hioping to run one of the self ealing type gaskets that do not require any RTV or other goop, but now I have to re-think the whole deal.
does the Cometic require silicone around the water ports? What did you not like about the copper gaskets?