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breaking in chrome piston rings, much different than cast or moly?

Chuck78

Chuck78

Forum Sage
Past Site Supporter
Do you handle the break in procedure any difference if you have chrome piston rings?my mechanic friend looked at them and didn't think they were chrome rings, the oil and middle ring where black, and the compression
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ring is silver, not shiny chrome plated looking silver. But now looking at the box, I see that its says chrome on the side.

The rings that came with the old old NOS MTC Engineering big bore kit are Hastings rings that, after researching from seeing a permanent-marker-blacked-out Honda/Nissan designation on the box, fit a 1971-1978 Honda Civic engine! At least I can get rings without having to custom order anything, if I could find rings for such an old Honda engine. I find it shocking that Hastings would make chrome rings for such an economy car, but it definitely says chrome on the side of the box.

my big concern is that a chrome rings are incredibly hard from what I have read, and much more difficult to break in. The machine shop guy looked at the box of the rings and I think mumbling something that was probably referring to the chrome, as I believe you use a more coarse hone when honing the cylinders for chrome rings.

what is to be expected when trying to break these things in? I was planning on 20 hard miles of accelerating and decelerating to break in the rings, but it now sounds like I should spend at least 30 or 40 & ride it pretty darn hard for a few hundred miles thereafter.

Any advice?
 
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http://www.enginehones.com/technical.html

Iron Cylinder Ring Type:
OEM Iron rings: 180 or 240 grit
Chrome rings: 240 or 320 grit
Moly Rings: 320 or 400 grit
Plasma Rings: 320 or 400 grit
not sure ring type: 240 grit

Don't think you need to do anything special with chrome rings. Just drive an aggressive city driving cycle.
 
I was planning on doing it at night on the highway, so that I had more load and zero time spent idling at stop signs & traffic lights, as well as not to **** off traffic as I constantly accelerate & engine brake for 20-30 miles. I didnt have time to weld in an o2 bung or hook up a switched power dource yet for the heated wideband sensor, but hopefully will do that tomorrow.

Went big on the mains, as I'm expecting to need about 115's, but with less compression before the rings are seated, & to be on the safe side, I went 122.5. Hope to ride all day long tomorrow to break it in more.
 
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