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Street miles / longevity on super thin rings #2841471
11/03/20 09:47 PM
11/03/20 09:47 PM
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Washington
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hemienvy Offline OP
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Super thin to me meaning less than .043" .
Good compression check after 10,000 miles ?
Info anyone ?

Re: Street miles / longevity on super thin rings [Re: hemienvy] #2841482
11/03/20 10:43 PM
11/03/20 10:43 PM
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AndyF Offline
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Check some high performance OEM engines. They come from the factory with thin rings these days.

Re: Street miles / longevity on super thin rings [Re: hemienvy] #2841728
11/04/20 02:38 PM
11/04/20 02:38 PM
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Stuttgart, Arkansas
rickseeman Offline
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Originally Posted by hemienvy
Super thin to me meaning less than .043" .
Good compression check after 10,000 miles ?
Info anyone ?


.043" would be huge in todays engines that go 180,000 miles


2011 Drag Pak Challenger
Re: Street miles / longevity on super thin rings [Re: rickseeman] #2841942
11/04/20 09:53 PM
11/04/20 09:53 PM
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Scully Offline
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It's all about the cylinder finish. With the proper finish, tension and oil, thin rings can go far beyond what they did in the past.

Re: Street miles / longevity on super thin rings [Re: Scully] #2842017
11/05/20 01:55 AM
11/05/20 01:55 AM
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Between a rock & a hard place
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Fuel management plays into this, I think. The OE stuff that can go +250k miles on thin rings are EFI.

Re: Street miles / longevity on super thin rings [Re: cudadoug] #2842052
11/05/20 09:07 AM
11/05/20 09:07 AM
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Stuttgart, Arkansas
rickseeman Offline
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Originally Posted by cudadoug
Fuel management plays into this, I think. The OE stuff that can go +250k miles on thin rings are EFI.


I agree with that.


2011 Drag Pak Challenger
Re: Street miles / longevity on super thin rings [Re: rickseeman] #2842094
11/05/20 11:57 AM
11/05/20 11:57 AM
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Prospect, PA
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Originally Posted by rickseeman
Originally Posted by cudadoug
Fuel management plays into this, I think. The OE stuff that can go +250k miles on thin rings are EFI.


I agree with that.


Yes, and probably other things too. Maybe ringland depth, ring- land clearance, cylinder finish, materials of consruction, piston to wall clearances - hot and cold, skirt lenght, motor rpm, compression/cylinder pressure, and probably a bunch of other quality and quality control aspects.

Re: Street miles / longevity on super thin rings [Re: BSB67] #2842375
11/06/20 12:11 AM
11/06/20 12:11 AM
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Melbourne , Australia
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I would see no reason at all to run a 5/64" or 1/16" ring in this day and age.

0.043" would be the thickest I'd want to go if I had the choice.


Alan Jones
Re: Street miles / longevity on super thin rings [Re: LA360] #2842424
11/06/20 05:11 AM
11/06/20 05:11 AM
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Livermore, CA
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Dduster Offline
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What piston manufacturer for these new thin rings?

Re: Street miles / longevity on super thin rings [Re: Dduster] #2842433
11/06/20 08:03 AM
11/06/20 08:03 AM
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Abilene, Texas
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fastmark Offline
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What about piston weight? Most new applications are super light weight compared to a stock 440. That can’t be good for skinny rings. Efi would help but most old Musclecars still run carbs.

Re: Street miles / longevity on super thin rings [Re: fastmark] #2842451
11/06/20 09:13 AM
11/06/20 09:13 AM
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Milwaukee WI
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TRENDZ Offline
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I can’t think of a reason that piston weight would have any bearing on ring wear/ problems.


"use it 'till it breaks, replace as needed"
Re: Street miles / longevity on super thin rings [Re: TRENDZ] #2842460
11/06/20 09:40 AM
11/06/20 09:40 AM
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New Smyrna Beach FL
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The new 5.7 hemi use a 1.2 mm top and 2nd ring so I don’t think you will have a problem running a thin ring

Re: Street miles / longevity on super thin rings [Re: scottb] #2842522
11/06/20 12:25 PM
11/06/20 12:25 PM
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Salem
Grizzly Online tonguue
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OEM engines are tuned for low-end, upshift sooner, and do 1500 rpm on the highway, that's why they last so long. Already mentioned, precise timing and fuel injection also helps them last forever.

My opinion, if you don't have overdrive, have anything over a 3.08 rear end, and run a carb, thin rings would not last as long as stock rings.


Mo' Farts

Moderated by "tbagger".
Re: Street miles / longevity on super thin rings [Re: Grizzly] #2842527
11/06/20 12:44 PM
11/06/20 12:44 PM
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Lake Villa Il
INTMD8 Online content
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^ Most common oem engines are low rpm but the high rpm oem engines out there run thin rings and don't seem to wear out fast.


69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
Re: Street miles / longevity on super thin rings [Re: INTMD8] #2842621
11/06/20 04:28 PM
11/06/20 04:28 PM
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Salem
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^ And how long does a Viper, Mustang, or Challenger spend at 3500 rpm out on the highway or in town for that matter? Almost never. Maybe 5% of the time in town.

How long does a 340, 440, 426 with 3.91's spend at 3500 rpm? All the time. Double the engine speed is double the wear. twocents


Mo' Farts

Moderated by "tbagger".
Re: Street miles / longevity on super thin rings [Re: Grizzly] #2842626
11/06/20 04:40 PM
11/06/20 04:40 PM
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Tulsa OK
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I have 2 drag weeks and a total of maybe 3500-4500 miles on some 1.5MM rings. Car leaked down 3% after its first test drive and it still leaks down the same as of a month ago. 4.10s no overdrive but it does have EFI. This was a CNC machined block with a Diamond hone from Shady Dell back in 2015.


68 Barracuda Formula S 340
87 "Chrysler" Conquest
Re: Street miles / longevity on super thin rings [Re: Grizzly] #2842627
11/06/20 04:41 PM
11/06/20 04:41 PM
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Wichita
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GY3 Offline
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Are 3.0, 1.5 and 1.5mm ring packs considered thin?


'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.

Re: Street miles / longevity on super thin rings [Re: Grizzly] #2842634
11/06/20 05:19 PM
11/06/20 05:19 PM
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Lake Villa Il
INTMD8 Online content
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Originally Posted by Grizzly
^ And how long does a Viper, Mustang, or Challenger spend at 3500 rpm out on the highway or in town for that matter? Almost never. Maybe 5% of the time in town.

How long does a 340, 440, 426 with 3.91's spend at 3500 rpm? All the time. Double the engine speed is double the wear. twocents


I was talking about high rpm factory engines. (stuff that turns 8,000+)

My Ferrari runs 4,000 rpm on the highway, engine is 26 years old. Tons of other factory engines that turn big rpm with thin rings. Of course they were designed to do that, just saying I don't think thin rings necessarily mean the engine is wearing out super fast.

Last edited by INTMD8; 11/06/20 05:20 PM.

69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
Re: Street miles / longevity on super thin rings [Re: INTMD8] #2842669
11/06/20 07:12 PM
11/06/20 07:12 PM
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MI, usa
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I run .8mm rings. 400 passes. Haven't leaked it. But still runs as good mph as it did when it was assembled.
Doug

Re: Street miles / longevity on super thin rings [Re: Dduster] #2842672
11/06/20 07:19 PM
11/06/20 07:19 PM
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Wisconsin
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Medlock51 Offline
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Every major ring manufacturer.

I was all in on these smaller ring packs. I ordered my pistons specing them but was disappointed when they came with traditional 1/16,1/16,3/16 grooves.

And I know they last a long time in the newer cars.

But seeing again of just 8 hp on a Hot Rod video I looked at it again.

In my dirt track world they may only last one season. I run alky and the bigger rings seem to be a safer bet against fuel dilution. And my engine is not filled with the latest and trickest parts...good stuff forged pistons, Crower rods, billet crank...

And I'm the ultimate budget guy living on SS and putting my car together with good used parts and careful decisions. I can't afford a refresh every year so I am happy with what I have.

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