Shell Preppin '74 EMS
Well, I had 160 liters of LN2 delivered yesterday and we had some fun!
Having done the wintertime and the torch and wire brush method I can say without a doubt this is the this is THE WAY of removing undercoating ( by the way I have removed 34 lbs so far) The best part is it leaves behind the very good factory primer.
Having done the wintertime and the torch and wire brush method I can say without a doubt this is the this is THE WAY of removing undercoating ( by the way I have removed 34 lbs so far) The best part is it leaves behind the very good factory primer.
Last edited by Luke on Wed Apr 02, 2008 9:06 am, edited 1 time in total.
- Crazyswede
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Awsome! I assume you guys did some other experiments with the liquid nitrogen once you were finished with the undercoating removal? :lol:
I know I would have smashed some bouncy balls/tennis balls. Probably poured some on various items just to see what happens :lol:
Not to sound like a noob but what is involved with this job? I assume you pour the liquid N2 onto the underbody coating but after that do you scrape it? or take a hammer and shatter it? Or does it just crack off?
Ian
I know I would have smashed some bouncy balls/tennis balls. Probably poured some on various items just to see what happens :lol:
Not to sound like a noob but what is involved with this job? I assume you pour the liquid N2 onto the underbody coating but after that do you scrape it? or take a hammer and shatter it? Or does it just crack off?
Ian
1-97 Impreza L wagon w/many mods--mine
1-C900 turbo w/290K--mine
4-C900 turbo's in various states--dads
1-Legacy wagon--dads
1-Forester--moms
1-C900 turbo w/290K--mine
4-C900 turbo's in various states--dads
1-Legacy wagon--dads
1-Forester--moms
- Geoff
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we get liquid nitrogen at work sometimes. The bouncy ball thing doesn't work for us. We have smashed grapes, orange peels, and other food. We put a rubber bushing in once and it exploded. We tried an identical bushing made from a new material and that one doesn't explode. I once froze a mixture of isopropyl alcohol and iodine, it ended up looking like fish roe.
- Crazyswede
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I also worked a bunch on rust repair this weekend. The more you pick the more you find. I should get some good SAAB karma for fixing up this hulk.
And lots more to go:
And lots more to go:
Last edited by Luke on Wed Apr 02, 2008 9:18 am, edited 1 time in total.
The current rally car probably had about 50 hours into undercoating removal and theres still some left on it. We removed about 90% of the undercoating on this car in 4 hours. Another 30 minutes and we would have had it all done but we ran out of the stuff :(
Well worth the $150 for the tank.
Thanks to Mike (RallyHO) and JVL for loaning out the "death ray" applicator and hose.
Well worth the $150 for the tank.
Thanks to Mike (RallyHO) and JVL for loaning out the "death ray" applicator and hose.
Last edited by Luke on Mon Jun 25, 2007 1:51 pm, edited 1 time in total.
The death ray is pretty simple. Its just a piece of steel tube with a squished end and a nice perforated insulating grip around it. It could be fabricated fairly easily. The fittings are standard 45 deg hydraulic fittings. I bought an extra piece of cyro hose which I ended up not really needing. The death ray has a 4 foot hose + 3 foot wand and with the cylinder on castors I was able to get into most places just fine.
You open the valve, spray the nitrogen liquid/gas mix that comes out the nozzle over a 16"x16" area (it takes about 30-45 seconds to really freeze it) You can hear a "crackle" and then you know its ready. Take a hammer and with a good wack and large sheets just fly off. It may have been partially nitrogen asphyxiation but we were giggling all night!
You open the valve, spray the nitrogen liquid/gas mix that comes out the nozzle over a 16"x16" area (it takes about 30-45 seconds to really freeze it) You can hear a "crackle" and then you know its ready. Take a hammer and with a good wack and large sheets just fly off. It may have been partially nitrogen asphyxiation but we were giggling all night!
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