I am going to rebore my B20Z + .25mm, but as I run turbo I would like B20B pistons .
Rings + .25 for B20B 13021-P3F-003 are not available anymore, I would like to know if those for B20Z 13021-PHK-003 are exactly the same, if the only difference it is the part number?
Thank you very much..
Laurent

 

compression in b20Z is higher

 

B20Z rings on B20B pistons it's ok?
That is the is the question.. :-)

 

I would check the helm manual, there should be specs for inspecting the rings. That should give you an idea if they are the interchangeable or not.

Dammit, I have a set of .25os PHK pistons and rings back in Florida. I have no idea which box I put them in though.

 

Ok. I'll recirculate the argument. The ONLY difference between the two is the compression ratio and dome height. As a manufacturer of millions of units, it is a matter of logic that you use the same set of rings for the engine unless it is specialty. So, it means YES, they use the same stuff. A helms will confirm it, but as a matter of production schedule and vendor use, YES.. Yes.. and did I mention, YES?