Ring End Gap - Competition Diesel.Com

biggy238 · 02-23-2010, 08:00 PM

I have a friend building what would be a mild build here, but should be over the 500hp mark, and I was thinking about the fact that I've never seen much discussion about ring end gap on high power/high temp builds.

This app is a cummins cr, but the information could be useful for others.

What do you all have for guidelines? I understand if the info isn't something to be shared, but I though it was worth asking.

*COMP461* · 02-23-2010, 09:44 PM

.025 to .028 untill you get well up there , then I've seen it butt at .028 .

paulb · 02-24-2010, 10:50 AM

From Dodge service manuals...

From an 01 service manual:
Top Ring - .014 - .0177
Intermediate - .0334 - .0452
Oil Control - .010 - .0215

From an 05 service manual:
Top Ring - .010 - .014
Intermediate - .033 - .045
Oil Control - .010 - .021

IMO for a performance diesel application, I would not set the top ring gap that tight. I would set it to .025, a little looser if you are going to spray it. For the second (intermediate) ring because they are keystone rings, I would follow the factory recommendations. I pretty much set all oil control rings (no matter what engine), to .015.

Paul

Dudge · 02-24-2010, 05:35 PM

"Biggy Biggy Biggy can't you see
Sometimes your words just hypnotize me
And I just love your flashy ways
Guess that's why they broke, and you're so paid (uh)"

Got some specs from a nice gentleman on this forum. They read as followed:

Intermediate: .0016 - .0043 thousandths
Oil control: .0016 - .0033 thousandths

Ring gap (installed in bore)

Top ring: .011 - .023 thousandths
Intermediate: .035 - .054 thousandths
Oil control ring .011 - .030 thousandths

He neglected to mention where the info was pulled, but he did seem like a knowledgeable fellow.

biggy238 · 02-24-2010, 09:22 PM

Quote:

Originally Posted by Dudge

"Biggy Biggy Biggy can't you see
Sometimes your words just hypnotize me
And I just love your flashy ways
Guess that's why they broke, and you're so paid (uh)"

Got some specs from a nice gentleman on this forum. They read as followed:

Intermediate: .0016 - .0043 thousandths
Oil control: .0016 - .0033 thousandths

Ring gap (installed in bore)

Top ring: .011 - .023 thousandths
Intermediate: .035 - .054 thousandths
Oil control ring .011 - .030 thousandths

He neglected to mention where the info was pulled, but he did seem like a knowledgeable fellow.

Just glad to have gotten some knowledgable and congruent answers.....

I like the fact that Greg mentioned having seen one butt.

Dudge · 02-24-2010, 09:54 PM

True that, brotha! Hey Greg, any other short block tips or secrets you would like to share with a mere common shade tree wrencher/slave? You can PM me or biggy if you want to keep them on the DL.

02-23-2010, 08:00 PM	#1
biggy238 Name: biggy238 Title: Too Much Time Status: Not Here Join Date: Aug 2008 Location: Just North of Wrong Member`s Gallery Posts: 10,867	Ring End Gap I have a friend building what would be a mild build here, but should be over the 500hp mark, and I was thinking about the fact that I've never seen much discussion about ring end gap on high power/high temp builds. This app is a cummins cr, but the information could be useful for others. What do you all have for guidelines? I understand if the info isn't something to be shared, but I though it was worth asking. __________________ Check out @bdmaximusworx 05.5 Campanella White TDi Jetta 5spd 45.5MPG -Little Sexy '10 Silver F250 CCLB 4X4 6.4L cummins Swapped Insta @trash.panda250

02-23-2010, 09:44 PM	#2
COMP461 Name: COMP461 Title: Comp Diesel Sponsor Status: Not Here Join Date: Apr 2006 Location: Aledo Member`s Gallery Posts: 4,009	.025 to .028 untill you get well up there , then I've seen it butt at .028 . __________________ Greg Hogue Comp461 race page Edelbrock Nitrous Outlet MaxSpool Engineering Exergy Performance

02-24-2010, 10:50 AM	#3
paulb Name: paulb Title: Too Much Time Status: Not Here Join Date: Jul 2006 Location: Klamath Falls, OR Member`s Gallery Posts: 1,673	From Dodge service manuals... From an 01 service manual: Top Ring - .014 - .0177 Intermediate - .0334 - .0452 Oil Control - .010 - .0215 From an 05 service manual: Top Ring - .010 - .014 Intermediate - .033 - .045 Oil Control - .010 - .021 IMO for a performance diesel application, I would not set the top ring gap that tight. I would set it to .025, a little looser if you are going to spray it. For the second (intermediate) ring because they are keystone rings, I would follow the factory recommendations. I pretty much set all oil control rings (no matter what engine), to .015. Paul __________________ 02 4x4 Auto Mach 6+'s, Drag Comp,Source Automotive Twins, Ultimate Transmission 05 2500 4x4 Auto 3.73 BBI 4's, Smarty Touch, Source Automotive Twins, F1 springs and Cam, Opie's bypass system, Mitusa, PPE Dual Fueler, Ultimate Transmission, Opie shafts,Isspro gauges

02-24-2010, 05:35 PM	#4
Dudge Name: Dudge Title: Diesel Enthusiast Status: Not Here Join Date: Feb 2009 Location: Kentucky Member`s Gallery Posts: 219	"Biggy Biggy Biggy can't you see Sometimes your words just hypnotize me And I just love your flashy ways Guess that's why they broke, and you're so paid (uh)" Got some specs from a nice gentleman on this forum. They read as followed: Intermediate: .0016 - .0043 thousandths Oil control: .0016 - .0033 thousandths Ring gap (installed in bore) Top ring: .011 - .023 thousandths Intermediate: .035 - .054 thousandths Oil control ring .011 - .030 thousandths He neglected to mention where the info was pulled, but he did seem like a knowledgeable fellow. __________________ Professional CompD Lurker with an '03 Dodge 2500 - It's broken.

02-24-2010, 09:54 PM	#6
Dudge Name: Dudge Title: Diesel Enthusiast Status: Not Here Join Date: Feb 2009 Location: Kentucky Member`s Gallery Posts: 219	True that, brotha! Hey Greg, any other short block tips or secrets you would like to share with a mere common shade tree wrencher/slave? You can PM me or biggy if you want to keep them on the DL. __________________ Professional CompD Lurker with an '03 Dodge 2500 - It's broken.