West TX RX-7

Just heard of a new product that you place in line in your intercooler or intake pipe and it has a welded box around the pipe to put dry ice in. Suppoised to drop temps 25-30 degress. Anyone know who it is that makes this?

Parastie

Someone posted a link for this a few days ago.
This would only be an advantage for a run or 2 on a strip though...

CompuBob

then after the racing you can add in some water, let the smoke roll out and you'll be ready for the rave's..

gerbraldy

"boom chica boom chica boom chica boom" (raving as typing) "I'm rolling bra's" You could put beer in it....

lastphaseofthis

iTrader: (8)

if it sealed and consealed why not liquid nitrogen? justa though...

koukifc3s

iTrader: (3)

http://www.01designsystem.com/diis.html

Seems easy enough to fabricate one yourself for $20.

TwistedRotors

iTrader: (3)

hah! I don't think that thing would work for crap! A 40-50 degree inlet temp drop just by packing ice around a pipe? BS. As soon as you get constant air flowing through the intake then it's not going to do anything.
-John

Travelintrevor

you are wrong! ice makes a diff...racers do it all the time at the track....even car manaufactuers do it..AUDI had a TT that had twin turbos and they stuffed ice into every little place they could to get the intake temps down during the high speed run...car still caught on fire....

BklynRX7

i personally think it would work. I mean dry ice is well under zero dergees farenheight and if the section of the pipe it covers si long enough its bound to cool the air. As long as u dont let the escaping C02 get inside your good. My father used to do something like this with fuel lines on his carbed mustangs. Colder=denser=better

lastphaseofthis

iTrader: (8)

sometimes you guys ****** crack me up!
its not "ice"
its "Dry Ice" solid state of the gas Carbon Dioxide... its close to 0 kalvin, thats why i said why not liquid nitrogen, the biggest drawback would be it evatorating quickly, but i know that it will give a hell of a lot of temp drop, overclocking experts use it all the time, turn a 135 degree (f) cpu down to -110 degrees (f)....rediculous

Evil Aviator

That idea is brand new... as of the 1930's.

You are only looking at about 1.2% fwhp per 10 deg F.

I hope they aren't using a regular tube with a smooth wall interior, as this would be very poor for heat transfer. However, since dry ice is about -109 deg F, it wouldn't need to be all that efficient to show some gains.

Yes, the amount of cooling is going to depend on the airflow rate. If they are advertising a 40-50 deg for a WRX, then it's not going to drop quite that much for an RX-7. Also, it will become less effective as the rpm increases. They didn't say whether the 40-50 deg drop was at idle or not.

Pattsy

iTrader: (1)

Ice on an intercooler, sure. Ice on an intake pipe, nope. Not enough surface area to chill the air plus the air is moving pretty quickly.

Pat

TwistedRotors

iTrader: (3)

Exactly.....so the air that's skimming the inside surface of the pipe will be slightly cooled but at WOT I don't understand how it could help out enough to even be noticeable. Now, let a bag of ice sit on your intercooler for 10 minutes before you go down the strip and you'll definately notice that. :-)
-John

lastphaseofthis

iTrader: (8)

john i really dont think you understand what a diffrence there is between ice and dry ice, ice is usually 15-25 degrees, dry ice is 109 or more...

i do agree at WOT the results will be less then at idle, thats a givin, and a str8 section of pipe wouldnt be enough for me to do it, but think about intercooler replacement, instead of air cooling hot air, use liquid nitrogen or dry-ice...
a few bends and enough surface area, plus given the heat of the air coming from the turbo, it would be many times grater then your regular joe-show FMIC.

TwistedRotors

iTrader: (3)

I honestly believe that this is a gimmick. C'mon guys, I know how cold dry ice is. That is not what I'm arguing against. I'm arguing against the lack of surface area to cool your intake charge. Sure, the inside wall of that pipe would probably freeze a layer of skin off your fingers if you weren't careful, but as long as your fingers don't touch it, then you'll be fine. Same applies for the air traveling through that pipe. Look at how radiators and intercoolers work......lot's of surface area, both external and internal. With this gimmick the intake charge doesn't sit in the pipe long enough to be cooled to any sort of usefulness.
Lastphase, you're absolutely right. Look at water to air intercoolers......those things can get your pressurized intake charge to below ambient temperature!! Awesome system for a drag racer, but again those coolers are designed with a high surface area to move the heat from your intake charge to the water in the system. And I just used a bag of ice for an example because we usually do that between laps at the autox down here in the summer. It gets a little hot outside. ;-)

rayden

a long honeycomb on the inside would do wonders i think. well, wonders may be too strong a word. or perhaps high flow metal screens? just speculating...

VietFC

Close to 0 kelvin? HAHAHA
I dont' think so.

chinook527

I would think putting dry ice on top of the stock intercooler would be much more effective. That would transfer more of the cooling effect into the airstream.

Mx6-Rx7 Addict

Not sure if this "ice box" is as effective as everyone thinks it is, but i know for fact that putting regular ice in a bag on the TMIC after making near one minute time trials at WOT most of the track, it made a huge difference between each run.. Although, this is from witnessing it, so i have no intake numbers or anything so i assume the same for the ice box.. I'm not going to say yey or ney until i see some numbers.


-Justin

Kenteth

Thats true if the laws of thermaldynamics weren't laws. But you know...physics has thing thing of not giving a **** about what you say.

Well... ever seen a fuel cool box? Basicaly take 5 feet of copper fuel line and coil it into a tiny box filled with ice or whatever. Does an excellent job at cooling the fuel. Now Reverse it, run liquid nitrogen for example, pressurized through the line with a relief somewhere so its constantly flowing. Wrap the coil inside your intake tube. Heatwrap your intake and viola... hella cool temps.

West TX RX-7

Well I think the deal is you put the dry ice in the box BEFORE you run. From the pictures I've seen the box and pipe were completely frozen. Looked like they had been dug out of an icebox and had been there 100 years. I would think it could easily drop the temps 20 degrees depending on the temp of the air to begin with. With it freezing up the pipe it is connected to would also freeze up.

Mx6-Rx7 Addict

I wouldn't think that the cooling similairities would be the same.. The fuel isn't moving nearly as fast as the air moves into the intake.. We use a similair method to cool engine oil on the helicopter i work on, its a fuel-oil heat exchanger.. In my eyes, the fuel would have much more surface area to exchange temperature..

Just my opinion..
Justin

scathcart

The temperature of dry ice is -109.3 degrees F .

O kelvin is -459.67 degrees fahrenheit.

These two values are nowhere even close.

Nice try on trying to sound smart, though.

lastphaseofthis

iTrader: (8)

the point being its alot colder then ice as other folks had been mistaken...
personaly i am going to use it along with and intercooler it, when i do my turbo engine swap.
instead of dry ice i will probly use liquid nitrogen instead, when i get some numbers then we'll see whose is smart...

jhammons01

anywhere in the double digit of the Kelvin range and our capturing molecules!!! No Molecules of......anything would make it to the intake. They would all be stuck to the metale sruface that was 99 kelvin or below.

Your molecular structure is such that once you cool (or take the heat away from) one molecule the heat transfers from the molecule next to it and so forth. So the Ice on your fingers analogy does not work. All you would have to do to create the effect is take the kelvins away from the first molecular layer and then allow the mean free path to do the rest.

If you wanted to really do this right you would go to scrap heap behind your house and get that old A/C compressor out of it, Beef it up(o-rings) put it back in your car and charge it with helium. Take your adsorber and place it in the intake like a radiator. You would be reaching the double digit kelvin range..... There is a little more to it but I gotta go. The compressor may rob as much HP as you get in increase for the cold air

One last thing anything you put in the intake is going to throttle your air flow, so all the porting you did just went out the window.

But all this is fun to discuss