Quote:
Originally Posted by Signature600
Just because I'm ignorant, what application would ductile iron liners be used?
Chris
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More like what application do you want to run a stainless top ring? Ductile iron liners usually follows. One application is extreme cylinder pressure and heat. Top fuel, or say some crazy guy building an insane c18.
The other application is where every hp counts. These guys want the thinnest lowest tension ring possible. Then they also have a dry sump and there's ways to modify the piston (gas ports) or rings (dykes rings). Think Nascar. No idea how well any of this works for diesels which is why I was asking. The tension is so low on these if you spun the engine over by hand you would swear there's no rings! Only when there's combustion do the rings push against the cylinder wall.
In the case of this guy's c18 im going to make some assumptions. First it's common with all high performance diesels to have head gasket issues. The fix involves running more than factory liner protrusion and making sure they're all the same. A real
PITA. But it gets to the point where you're either cracking heads from too much protrusion or blowing head gaskets from not enough.
One option is to run an oring setup. But you can't do that with cast liners like the guy said earlier because they crack. So then you upgrade to ductile iron to handle the process. The added benefit is that ductile iron is harder. The liners are also spun cast so the grain is perfectly controlled unlike regular cast liners.