Hi.
What do you think about gapless top rings? Are there any tangible differences compared to conventional rings?

 

I like the idea of gapless rings, but I don't know how durable they really are, and I have not personally used them. I do know the idea behind all of this though. Rings work by being forced by cylinder pressure down against the ring land and out against the cylinder walls, those are the 2 sealing surfaces. Keeping that in mind, if you put the gapless one in the second position, the first ring won't seal, but it will shield the (somewhat more fragile) gapless ring from the heat of combustion. That may be ideal. If you put the gapless ring on the top, it may not be able to survive, depending. Also if you put it on top, the gapped ring below it will do almost nothing, (maybe just act like an oil ring?) since it won't even see any real differential pressure across it. Hopefully someone who actually has experience with gapless rings will post up.

 

you do not want to use a gapless top ring with a turbocharged engine. it will cause the top ring to flutter like crazy and start makin the top ring groove wider and eventually pop the top of the piston off. i know this from experiance.
Now using the gapless 2nd ring is worth it because then the top ring wont flutter but will make a good seal for less blow by

 

Are you sure? How did you figure that? Did you using gapless top and second rings in the same time?
The gapless second ring is good thing for methanol and etc because it prevents oil from flooding. I know that it actually lower the hp because it traps gasses between top and second comp ring and it cant escape quickly. The top ring start to flutter and it can not seal enough fast too.

 

no i tried both sets different times. and when i had the gapless top rings where the valve relief is it pushed it up from the ring flutter

 

that's not from the ring flutter. That's caused by the piston head overheating. That means that top ring has been overheatened too or it can't transmit heat enought fast to the cylinder bore. That can cause piston cracking.
sorry i am drunk due to happy new year

 

bump