Ring Location.

[SmokinCAT]

Is there any performance change that will be noticed from having this much difference between ring locations between this aluminum piston and the monotherm.

 

[Scooter's Roofing]

emissions will certainly be better with that higher top ring land!

 

[SmokinCAT]

Compression is 14.6:1 on the aluminum and 15.5:1 on the steel if that matters much.

 

[Leiffi]

higher ring location is always better because there is less "dead space". Durability is what decides ring location, steel is stronger so rings can be placed higher.

 

[Runninlean]

By that picture it looks like the pin center if different also?

 

[DISTURBED]

Valve reliefs if you wanted to ad them in the aluminum one. Im wondering how the lower ring would fair with all the broken top rings in the CR engines. I would think heat would be less on the top ring as well

 

[SmokinCAT]

By that picture it looks like the pin center if different also?

Compression distance is the same above the pin on both pistons.

 

[SmokinCAT]

Valve reliefs if you wanted to ad them in the aluminum one. Im wondering how the lower ring would fair with all the broken top rings in the CR engines. I would think heat would be less on the top ring as well

These are for an over the road truck engine, previously there were only aluminum options for this specific series, found the monotherm in a V8 engine with the same bore.