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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: cryogenic treatments for engines.
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Sat, 13 August 2005 11:12
 
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| frontspinner wrote on Sat, 13 August 2005 19:36 |
it seemed to make alot of sense, its kindof like nitriding but goes the whole way through the part instead of only a few millimeters.
they claimed that it made a block upto 300% stronger!
has anyone had experience with cryogenics?
id like to hear what people think about it.
i'm considering applying it to my full-house 4K build.
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i hate to be the one to say it but you/they have absolutely no idea.
nitriding. part is heated to maybe 6-700 deg and nitrogen adsorbs, and then absorbs into the metal, either forming nitrides (hard compunds), or strengthening by interstitial mechanisms. nitriding give higher hardness WHERE IT IS NEEDED. at the surface...
that said, nitriding a crank is kinda a waste of time because you should never let a crank touch the bearings anyway  if it does, the engine id ucked regardls of whether the crank is nitrided or not..
cryogenics. part is cooled down to HELP TRANSFORM RETAINED AUSTENITE into ferrite and cementite.. possibly as pearlite. because austenite is metastable, this may ocur, but the kinetics are very slow because diffusion at low temps is negligible (usually i consider difusion below 600deg negligible  ) it may chnge the austenite to martensite as that is a difusionless transformation... either way, the surface becoms a little bit harder, thus wear resistance, and the part supposedly has a bit better thermal stability.
it ay help "settle" a block that is relatively new and hasn't seen too many thermal cycles.. but to apply this to a 4K build is just pissing up a wall... unless you are planning something radical with the valvetrain, the rest is a waste of time.. basically...
as for cryogenics and alloy... well.. some ppl say they get results... they are usually either the companies doing it.. or ppl that have paid a lot of money to have it one... im not saying it doesn' do anything.. just for 99.999% of people, it's not really worth considering....
except for gearsets.
Cya, Stewart
edit, cbf fixing speeling.. to busy eating tofu
[Updated on: Sat, 13 August 2005 12:03]
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| | Subject | Poster | Date |
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cryogenic treatments for engines.
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frontspinner | Sat, 13 August 2005 09:36 |
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Re: cryogenic treatments for engines.
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draven | Sat, 13 August 2005 09:49 |
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Re: cryogenic treatments for engines.
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frontspinner | Sat, 13 August 2005 09:54 |
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Re: cryogenic treatments for engines.
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Rallystanza | Sat, 13 August 2005 09:59 |
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Re: cryogenic treatments for engines.
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oldcorollas | Sat, 13 August 2005 11:24 |
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Re: cryogenic treatments for engines.
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oldcorollas | Sat, 13 August 2005 11:12 |
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Re: cryogenic treatments for engines.
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frontspinner | Sun, 14 August 2005 00:53 |
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Re: cryogenic treatments for engines.
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Lukass | Sun, 14 August 2005 03:43 |
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Re: cryogenic treatments for engines.
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oldcorollas | Sun, 14 August 2005 03:57 |
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Re: cryogenic treatments for engines.
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draven | Sun, 14 August 2005 04:29 |
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Re: cryogenic treatments for engines.
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oldcorollas | Sun, 14 August 2005 04:39 |
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Re: cryogenic treatments for engines.
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Lukass | Sun, 14 August 2005 04:47 |
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Re: cryogenic treatments for engines.
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oldcorollas | Sun, 14 August 2005 04:58 |
