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Piston rings

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Russ Pottenger
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Posts: 808
Joined: August 15th, 2009, 1:27 am
Stroker Displacement: 4.7
Vehicle Year: 2000
Vehicle Make: Jeep
Vehicle Model: Cherokee

Re: Piston rings

Post by Russ Pottenger » October 16th, 2020, 11:48 am

Sailboy42 wrote:
October 16th, 2020, 5:28 am
I was looking at chrome rings. Yes, they take longer to seat but I can deal with that. Why else would I not want them?
Unless you’re building an engine for a cropduster or an engine in a dirty environment with poor air filtration there’s no real good reason to run a chrome top ring.

Yes the chrome ring is hard to break in, but the real deterrent is that they are harder on cylinder walls.

With that said we do use chrome rings on some supercharged and turbocharged engine applications because detonation can cause the moly to flake off the top ring In severe conditions that you wouldn’t find in a normally aspirated engine such as in our Jeeps.

Sailboy42
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Posts: 35
Joined: July 31st, 2020, 2:45 pm
Vehicle Year: 1989
Vehicle Make: Jeep
Vehicle Model: YJ

Re: Piston rings

Post by Sailboy42 » October 19th, 2020, 8:52 am

So the chrome is really far into the specialty part area.

And we want to avoid using it to avoid having to rehone our blocks?

Russ Pottenger
Strong Poster
Strong Poster
Posts: 808
Joined: August 15th, 2009, 1:27 am
Stroker Displacement: 4.7
Vehicle Year: 2000
Vehicle Make: Jeep
Vehicle Model: Cherokee

Re: Piston rings

Post by Russ Pottenger » October 19th, 2020, 11:24 am

Go with a Moly ring with a 400ish grit finish.
I prefer a 5/64 5/64 3/16 std oil tension oil ring package for 200k plus street engines. That is the ring set you’ll need if you choose to run the KB 944 piston or any OEM replacement Jeep piston pre metric.

Sailboy42
Learning to use the board
Learning to use the board
Posts: 35
Joined: July 31st, 2020, 2:45 pm
Vehicle Year: 1989
Vehicle Make: Jeep
Vehicle Model: YJ

Re: Piston rings

Post by Sailboy42 » Yesterday, 6:18 am

:) roger that

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