Re: 4.375 bore 440 piston ring choice
[Re: 8urvette]
#3076437
09/12/22 12:30 AM
09/12/22 12:30 AM
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Joined: Aug 2003
Posts: 43,292 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,292
Bend,OR USA
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Last edited by Cab_Burge; 09/12/22 09:41 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 4.375 bore 440 piston ring choice
[Re: Cab_Burge]
#3076572
09/12/22 01:27 PM
09/12/22 01:27 PM
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Joined: Aug 2011
Posts: 2,872 Pattison Texas
CSK
master
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master
Joined: Aug 2011
Posts: 2,872
Pattison Texas
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I would get the new Total seal rings that have gas port cuts in them , unless your pistons already have gas ports LOL
Last edited by csk; 09/12/22 01:27 PM.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: 4.375 bore 440 piston ring choice
[Re: AndyF]
#3076761
09/12/22 10:40 PM
09/12/22 10:40 PM
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Joined: Jul 2011
Posts: 781 wine country
8urvette
OP
super stock
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OP
super stock
Joined: Jul 2011
Posts: 781
wine country
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ok, new twist...
what now?
5 thousandths wont clean this up... i doubt 10 would fix it. what do i do now?
Last edited by 8urvette; 09/12/22 10:41 PM.
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Re: 4.375 bore 440 piston ring choice
[Re: 8urvette]
#3076777
09/12/22 11:34 PM
09/12/22 11:34 PM
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Joined: Mar 2003
Posts: 2,524 PA
moparacer
master
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master
Joined: Mar 2003
Posts: 2,524
PA
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ok, new twist...
what now?
5 thousandths wont clean this up... i doubt 10 would fix it. what do i do now?
Sleeve time? As far as rings I have been running Total Seals gapped AP rings.... I have seen them live through things that would eat other rings alive. For instance, I ran most of last year with a cracked #8 cylinder. Had to drain the water out after each race. Before I pulled it I decided to do a leakdown, and it was only 5 percent lol. Ran alky on it all year too boot. A couple of times we reused the rings after a season of racing too. I do run a vacuum pump, but I have never had any blowby issue since my engine guy started using them.
67 Barracuda street/bracket car 11.27-119 68 Dart 502 BB 8.70s-152 414 cid SB Dragster 7.65-174
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Re: 4.375 bore 440 piston ring choice
[Re: moparacer]
#3076796
09/13/22 06:04 AM
09/13/22 06:04 AM
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Joined: Mar 2003
Posts: 9,100 Rogue River, OR
Jeremiah
master
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master
Joined: Mar 2003
Posts: 9,100
Rogue River, OR
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For a 200 shot I'd run hellfire in 1/16-1/6-3/16 grooves and Mahle GNS if using 1.5-1.5-3.0mm
Burr on the ring? Lock coming out? Can you catch the horizontal scratches with a finger nail?
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Re: 4.375 bore 440 piston ring choice
[Re: fast68plymouth]
#3076900
09/13/22 12:18 PM
09/13/22 12:18 PM
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Joined: Jan 2003
Posts: 31,074 Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 31,074
Oregon
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I’ve re-ringed way worse. Yeah, for a race motor just re-ring it and go. It will puff a little blue smoke in the lights but big deal. You can freshen it over the winter.
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Re: 4.375 bore 440 piston ring choice
[Re: 8urvette]
#3077118
09/14/22 03:31 AM
09/14/22 03:31 AM
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Joined: Aug 2003
Posts: 43,292 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,292
Bend,OR USA
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what caused that damage? F.O.D., Foreign object damage or what? Sorry to see that
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 4.375 bore 440 piston ring choice
[Re: 8urvette]
#3077227
09/14/22 02:03 PM
09/14/22 02:03 PM
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Joined: Jan 2003
Posts: 4,758 Moved to N.E. Tennessee
GomangoCuda
master
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master
Joined: Jan 2003
Posts: 4,758
Moved to N.E. Tennessee
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Is that damage in one cylinder or all of them? How far from the top of the cylinders do the scratches go? That will tell you if they are from a ring or piston skirt.
For now pick any junk from the skirts, give the cyllinders a few swipes with a glaze breaker, new rings.and run it till you want to fix it.
:Edited after looking at your pic again. Those scratches are pretty high up, close to where the top ring rides.
Last edited by GomangoCuda; 09/14/22 02:11 PM.
In theory, there is no difference between theory and practice. In practice, there is.
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