Quote:
Originally Posted by brighton911
Yes, the new second rings are indeed Napier cut. And Neil, you piqued my interest on the 2.8 mm oil rings being just a wider expander so I checked the rails. The 2 mm sets have rails .012" thick, the 2.8 mm ones are .015" thick. So percentage wise, about 20% thicker but significant, I don't know.
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Good.
The 2nd ring does a lot in controlling the oil too. Its probably a cast ring so be careful installing them.
I'm a big fan of 3 piece rings in these engines. I believe the separate oil rails work independently of each other somewhat and help control the oil when the pistons tip.