blowit Posted December 3, 2008 Report Share Posted December 3, 2008 I still disagree... I've seen motors with 220lbs plus of cranking compression, they just needed the right profile for their dome so they wouldn't smoke Orings. Check out the new design on the Chariot head. They are thicker to prevent this as well.... D, I do have a couple motors out that run 250psi static compression with a pro design head without issues. Those are both 4mm motors. I think O-rings work fine, just do not have any margin of error built in but that is not always a bad thing. A check valve for detonation would be nice. :biggrin: Brandon Quote Link to comment Share on other sites More sharing options...
dajogejr Posted December 3, 2008 Report Share Posted December 3, 2008 based on that, Brandon....do you think a head gasket will hurt a motor because hard parts would fail before the head gasket? Quote Link to comment Share on other sites More sharing options...
blowit Posted December 3, 2008 Report Share Posted December 3, 2008 based on that, Brandon....do you think a head gasket will hurt a motor because hard parts would fail before the head gasket? Actually, we have seen a head gasket do the same thing in severe circumstances. The gasket will burn down on the exhaust side all the way to the coolant passage. I will agree that O-rings can almost have a fail safe built in. Like I say, we have not totally wrote them off as junk but they are NOT the best way to seal a super high pressure, high temperature environment. Increasing thermal conductivity with a copper gasket is reason enough to switch to them. We like them. This is in reference to the stock head of course. Pros and cons to everything I guess. Brandon Quote Link to comment Share on other sites More sharing options...
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