Just how much and for how long would it keep compression up? The rings wear at a simlar rate or is the second one there to just pick up the slack somehow? When a ring costs $20 odd and takes an hour or so to replace I don't understand the logic. That keeping a component way past it's life is somehow more cost effective?
The purpose of the rings is to seal. If there are 2, then it will seal better, for longer than 1. Even if both rings are worn similar to the single, 2 rings will still seal better. If it is sealing, the amount of wear is not important, and you are not using it past it's life.
yes but its a matter of diminishing returns.
if you have a ring with a 99% seal at operating RPM, then only 1% would pass through to the second ring for it to seal another 99% of that 1% which passed through the first ring.
I cant remember what the ring sealing factor is but its up there somewhere.
so the second ring is completely useless if you ask me.
The ring is considered past its life once its sealing rate begings to decrease, therefore more reliance is put on the second ring.
Whereas if you put a new ring in as soon as compression begins to drop you can retain maximum performance.
