would you do this to a numbers matching motor

[oldgold69]

My brother in law works for a company that can cyro freeze an engine. I did to my sons 396 engine but it was not a numbers matching motor  Also would you do it to disc rotors  I have the old four piston brakes  the rotors are used but are in good condition I thought they might not warp when they get hot

[Dans 68]

Would you explain what this process does? I'm guessing that it "conditions" the metal that undergoes this process but I do not know metallurgically what is happening. Give me a hint. 

Dan

[oldgold69]

what you do is put all the engine parts in a pressure tank .  then they add liquid nitrogen. then you drop the temp of the parts down to i think 300 degrees below zero. it stay in it for about 8 hours  then you let it come back up to room  temp. then i think it goes in an oven for some time. IT is supposed to change  the direction of the molecules in the metal to go all one way .It's what they do to race engines  Some people call it chilling a block

[Dans 68]

Sounds like nitriding the metal, whereby you increase the wear properties of the metal. The article http://www.key-to-steel.com/Articles/Art117.htm better explains it. The article states that principal reasons for nitriding are:

    * To obtain high surface hardness
    * To increase wear resistance
    * To improve fatigue life
    * To improve corrosion resistance (except for stainless steels)
    * To obtain a surface that is resistant to the softening effect of heat at temperatures up to the nitriding temperature

If this is not the nitride (surface only) process, I'd be interested to know more.

These are all are good things to do to an engine block. The only question is how much money to do this, and is it cost effective?

Dan

[Challenger340]

what you do is put all the engine parts in a pressure tank .  then they add liquid nitrogen. then you drop the temp of the parts down to i think 300 degrees below zero. it stay in it for about 8 hours  then you let it come back up to room  temp. then i think it goes in an oven for some time. IT is supposed to change  the direction of the molecules in the metal to go all one way .It's what they do to race engines  Some people call it chilling a block

Say What ?

[Charger74]

He pretty much explained it correctly.  By cryo freezing the metal, it aligns the molecules better thus increasing the hardest and rigidity of the metal.  I don't have a website here at work but there is a company in Scottsdale Az that has a really awesome explaination on the process and what it does.   Some of the testimonials are pretty nice.  One person stated he used to break a couple of axles a season racing, but hasnt' broken one in a couple of years since havig the process done.   My friend who showed me the site was going to have his crank done for his 327.   

This is something I have definitely considered doing this myself but the cost maybe the limiting factor.

Also, it's not suppose to alter the dimensions of the metal.

[WingCharger]

Sounds good to me! 

[RD]

very interesting, i will talk to my machinist to see what is opinion on the process and fiscal aspects too!

[bull]

IMO it depends on whether it's a numbers matching 318 or a numbers matching 426 or 440 if you get my drift.

[rav440]

 what does this cost ?

[oldgold69]

His boss let's do this if he has space in the vat. It has to run whether It's empty or full. so I get it done for free.My motor is a383 hp 

[Dans 68]

I think this website http://www.nitrofreeze.com/cryogenic_treatment.html?gclid=COXJ6vzAl5QCFRGiiQodRBrkzg explains the process and results.

Dan

[terrible one]

I would sure as hell do it. Hell, you're just making the numbers motor stronger and longer lasting.

[Steve P.]

 

[oldgold69]

thanks for the link . It answered alot of questions.   thanks