cryo-tempering
#1
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cryo-tempering
Well I've broken my 4L60E transmission for the fifth time - output shaft. (I know I should go to the 4L80E, but with the California smog laws, it's hard.) Anyway, having replaced everything possible, my trannyman suggested cryo-tempering all the hard parts. A cryo-company slowly (about 1 degree per minute) cools a high carbon part to minus 300* with liquid nitrogen, leaves it for 12 hours, then slowly heats it back up. It rearranges the carbon molecules and makes the part 2-3 times stronger. Even works with carbon plastic! Cost is about 10% of the part. That's about $200-$300 for a tranny. I've heard of this but thought it was only for million dollar formula cars. Any of you other more money than brains racers tried this? If you know anything about it let me know. I'm gonna try it. I'll let the forum know how it works.
#3
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It definitely works. I studied metalurgy in college and cryo is used in many applications. Became poular with competition firearms and now is used in lots of places. I have cryo treated rotors and pads. I don't think you need to treat the whole transmission but I guess it would work, I jsut don't see the benefit. I know Chuck @ FLT is a fan of cryo treating certain parts.
#4
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If you find an industrial heat treatment facility in your area they may be doing cryo treatment as well.
Cryo treatment is used in allot more inustries than just automotive.
http://www.frigidind.com/cryo_racing.htm
http://www.metal-wear.com/Cryo_Racers.htm
http://www.americancryogenics.com/process.html
Cryo treatment is used in allot more inustries than just automotive.
http://www.frigidind.com/cryo_racing.htm
http://www.metal-wear.com/Cryo_Racers.htm
http://www.americancryogenics.com/process.html
#5
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my materials teacher was worthless, I have that final in a few hours, should be soooo nice get out of there and not have to listen to someone that knows less then the students. He never even mentioned cyro treatments
#6
TOTM: January 2007
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Originally Posted by AintNoHo
Well I've broken my 4L60E transmission for the fifth time - output shaft. (I know I should go to the 4L80E, but with the California smog laws, it's hard.) Anyway, having replaced everything possible, my trannyman suggested cryo-tempering all the hard parts. A cryo-company slowly (about 1 degree per minute) cools a high carbon part to minus 300* with liquid nitrogen, leaves it for 12 hours, then slowly heats it back up. It rearranges the carbon molecules and makes the part 2-3 times stronger. Even works with carbon plastic! Cost is about 10% of the part. That's about $200-$300 for a tranny. I've heard of this but thought it was only for million dollar formula cars. Any of you other more money than brains racers tried this? If you know anything about it let me know. I'm gonna try it. I'll let the forum know how it works.
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#9
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J, I'm in San Diego, so I'm trying a local company- cryoscience.com. I have broken 2 cranks. First was a Summit iron 383 crank (to be expected), and second was a Scat forged 383 (I think they're made in China). Presently, I have an Eagle forged and internally balanced with which I'm quite happy. If it breaks I'll try cryo tempering. (Both cranks broke completely in half at the front oil passage. Sent the balancer and pulley flying. I suspect weak cranks plus external balancing.)