| | Heat cycles / lifespan of copper headgaskets?
I'm looking at purchasing a high-performance 408 running SCE copper headgaskets. This setup will be used in a mostly street application - it will see some time at the strip and circuit, but over half the time will be street driven. I've been told by my machinist that the engine buids he sees with copper headgaskets are torn apart after a season or two, and that the gaskets really don't make good street gaskets due to numerous heat cycles (engine ran, then shut off, ran then shut off). I personally have never owned an engine with copper headgaskets, and I searched the archives over here with mixed results...I was wanting to know your opinions on them? If you're running them, how long have they been in there without the engine being torn apart, and how often is the vehicle driven? Since this is going to be a street-oriented build, I'd prefer to not have to pull the heads every so often to tend to the headgaskets.
While I'm on the topic, I'm thinking about installing a thicker headgasket to lower the CR a bit - this will offset the intake ports, so I'm wondering if a thicker intake gasket can be purchased somewhere to be used in conjunction with the thicker HG?
Last edited by zeeboost; 02-18-2009 at 01:25 PM.