O-Ring or Fire Ring

Why do there seem to be such wildly varied results with Fire Rings? Are people using that much variance on the groove depth vs ring section, or groove width, ring material etc....

What causes some people to run Fire Rings to hell and back without issue, while others can't get them to seal as well as a stock gasket?

Seems like a balancing act where not enough "crush" and the compression leaks past the ring, and too much "crush" and the head would float up on the rings and not compress the gasket enough, and now you have coolant leaks.

Are the failures purely the result of improper specification on the groove depth/width? Or is it also because of improper material selection for the rings themselves?
 
yea this seems to be the truth some people have great luck and others non what so ever. its hard to belive there ant a set groove depth and width for all rings. so we all can get that everlasting head gasket LOL.
 
I had firerings for like 12,000 miles done by Joe Hellmann, he cut the reciever grooves into the head. Since I dropped a valve and killed three pistons I am doing a complete rebuild. I am taking the block to Joe to have him machine it flat and cut the grooves into the block this time.
 
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