[Alan Roehrich]

I don't suggest those without a lot of experience, control of their bore finish, and access to a dyno try to use an oil ring with less than 10# of tangential tension, and 12# might be better.

The vast majority of "do it yourself" guys are best served with a 10-12# oil ring and the 1.0MM or so compression rings with spacers, and the "gas ports" on the top ring spacer. Get the Napier cut on the 2nd ring, too.

Given a relatively "common" bore size, you shouldn't need to spend more than $650 or so, maybe a little more.

When you get into the ultra narrow compression rings and ultra light oil rings, one very minor mistake can be catastrophic. Yes, they can be made to fly, if everything is right, but if everything isn't just right, they can be very difficult to deal with.