Piston pic.
#21
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iTrader: (3)
New LSX supercharged COPO camaro engine has
Mahle .043" x .043" x3mm
Ductile iron top with radius molybdenum face
Plain cast-iron tapered 2nd
Chrome-plated oil rails with low-tension expander
GM 572ci 720R engine
Plasma Moly top rings (unsure if steel or ductile)
Ford Supercharged 5.4L
Plasma moly steel top ring Mahle
6.0L LS Corvette engine
Plasma moly steel top, iron second
Dodge Viper V10
Plasma Moly ductile top ring, iron second ring
6.4L Hemi
Plasma Moly steel top ring, iron second
Just doing some research. I don't believe mercury racing used gapless ring sets in their HP engines? Unless maybe on the new stuff like 1350s? Idk. Its interesting some of these new modern engines, are still using conventional rings, making more HP per ci than ever, thinner oils than ever, longer oil change intervals than ever, and so on.
Mahle .043" x .043" x3mm
Ductile iron top with radius molybdenum face
Plain cast-iron tapered 2nd
Chrome-plated oil rails with low-tension expander
GM 572ci 720R engine
Plasma Moly top rings (unsure if steel or ductile)
Ford Supercharged 5.4L
Plasma moly steel top ring Mahle
6.0L LS Corvette engine
Plasma moly steel top, iron second
Dodge Viper V10
Plasma Moly ductile top ring, iron second ring
6.4L Hemi
Plasma Moly steel top ring, iron second
Just doing some research. I don't believe mercury racing used gapless ring sets in their HP engines? Unless maybe on the new stuff like 1350s? Idk. Its interesting some of these new modern engines, are still using conventional rings, making more HP per ci than ever, thinner oils than ever, longer oil change intervals than ever, and so on.
#22
Banned
New LSX supercharged COPO camaro engine has
Mahle .043" x .043" x3mm
Ductile iron top with radius molybdenum face
Plain cast-iron tapered 2nd
Chrome-plated oil rails with low-tension expander
GM 572ci 720R engine
Plasma Moly top rings (unsure if steel or ductile)
Ford Supercharged 5.4L
Plasma moly steel top ring Mahle
6.0L LS Corvette engine
Plasma moly steel top, iron second
Dodge Viper V10
Plasma Moly ductile top ring, iron second ring
6.4L Hemi
Plasma Moly steel top ring, iron second
Just doing some research. I don't believe mercury racing used gapless ring sets in their HP engines? Unless maybe on the new stuff like 1350s? Idk. Its interesting some of these new modern engines, are still using conventional rings, making more HP per ci than ever, thinner oils than ever, longer oil change intervals than ever, and so on.
Mahle .043" x .043" x3mm
Ductile iron top with radius molybdenum face
Plain cast-iron tapered 2nd
Chrome-plated oil rails with low-tension expander
GM 572ci 720R engine
Plasma Moly top rings (unsure if steel or ductile)
Ford Supercharged 5.4L
Plasma moly steel top ring Mahle
6.0L LS Corvette engine
Plasma moly steel top, iron second
Dodge Viper V10
Plasma Moly ductile top ring, iron second ring
6.4L Hemi
Plasma Moly steel top ring, iron second
Just doing some research. I don't believe mercury racing used gapless ring sets in their HP engines? Unless maybe on the new stuff like 1350s? Idk. Its interesting some of these new modern engines, are still using conventional rings, making more HP per ci than ever, thinner oils than ever, longer oil change intervals than ever, and so on.
Last edited by horsepower1; 12-05-2015 at 11:15 AM.
#23
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iTrader: (3)
Be careful with your research sources. A lot of terms and nomenclature gets regurgitated with no thought or verification of accuracy. I know Ford has been using steel (not moly, just steel) top rings for a LONG time on the 5.0 engines. I doubt very much any of those factory engines you mentioned are using Moly top rings. "Plasma moly" and "steel" usually don't go together in the same sentence when talking about rings. There a lot of coatings available for steel rings, but "plasma moly" isn't one of them AFAIK. I could be wrong and I'm going to do some checking, and if so I'll be glad to apologize...
Plasma Moly Carbon Steel Top ring
Mahle part 42112CP
http://catalog.mahle-aftermarket.com...rId=784222&d=t
6.0 LS GM Engine
Plasma Moly Carbon Steel top ring
Mahle #41858CP
http://catalog.mahle-aftermarket.com...rId=615547&d=t
6.4L SRT Hemi engine
Mahle #42156CP
Plasma moly Carbon Steel top ring
http://catalog.mahle-aftermarket.com...Id=1206357&d=t
Isnt "MOLY" a coating on the face of the ring, and "plasma" the process used to apply the coating? I've always assumed a top ring is either Steel, or iron, with a "MOLY" coating applied to the face. Pretty sure OEM's have been using moly faced steel top rings for some time now.
Last edited by MILD THUNDER; 12-05-2015 at 01:54 PM.
#24
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iTrader: (3)
Dan, if you were to use the piston rings JE suggests with those inverted dome 4.500 bore pistons, these would be them.
http://www.summitracing.com/parts/jep-j100f84500-5
http://www.jepistons.com/Products/257942.aspx
http://www.summitracing.com/parts/jep-j100f84500-5
http://www.jepistons.com/Products/257942.aspx
#25
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It was a oil containment issue(had to use that line) looks like may have been from valve guide/seal or possibly intake sucking oil.speaking of rings the trend now is a very low drag, and a very specific hone to match the rings, down side to this is oil control, that old balancing act. Also crankcase pressure can cause oil to be forced by the rings, several things to look at here...
#28
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iTrader: (1)
Inline with the ring talk, What about the piston design Icededpple is using - meaning the 'antidetonation' or sometimes called 'contact reduction' grooves ?
I know what the manufactures say about them but it seams alot of prof builders don't say much at all about them.
Seen this for a bit in the 2 cycle world before 4 cycle apps. With 2 cycle, it supposedly holds more oil in those apps. Remember, oil is air or fuel fed.
Anybody have any info either way ?
I know what the manufactures say about them but it seams alot of prof builders don't say much at all about them.
Seen this for a bit in the 2 cycle world before 4 cycle apps. With 2 cycle, it supposedly holds more oil in those apps. Remember, oil is air or fuel fed.
Anybody have any info either way ?