Seems this has become a generic thread on cylinder finish. Pls slap me this July 4 if not.
I’ve had 95mm Mahle cylinders replated to 6Ra. From what I gathered then and since, that was for Goetz rings. Engine builder wants to use Mahle rings. My concern is Mahle rings may be a different substrate and require different specs on roughness? Would greatly appreciate a steer before it goes back together.
Below quote was very helpful KTL.
Quote:
Originally Posted by KTL
Anybody who's bought CP pistons should take note of the spec sheet that comes with them. Their sheet actually includes the cylinder surface roughness spec you need to relay to the plater, if you're having original Mahle cylinders re-plated. I don't have the sheet handy with me right now but i'll post a picture of it here when I get my hands on it at home.
As Neil said, the desired roughness is not just based on "hey plater, it's Nikasil so please establish roughness accordingly for that." It's the ring material that dictates your roughness value(s). Charles Navarro has shared some of this roughness data before
smoking newbuild
Excessive oil after rebuild |