co2 is not combustable. in fact they used to use that in fire extinguishers. (can't anymore due to air quality blah blah in CA).

so adding a stream of co2 to the intake a good idea? I doubt it.

while the intake temp might go down a bit by the time it reaches the cylinders the effect would be minimal if any. also you're mixing co2 to the intake air... which does not combust... bad idea.

 

It could work nicely if you have an air-to-air intercooler, you could spray the CO2 on the outside of it. But um yeah, I don't think that's what this is.

 

The Co2 isn't injected into the engine. These systems (air or fuel bar) is to be used as a heat exchanger for whichever you choose (once again air or fuel).

Oh and, uh, :repost:

https://www.honda-acura.net/forums/s...threadid=46067


"CryO2 Intercooler Sprayer mounts directly to the front of the intercooler or aftercooler and vents liquid CO2 directly into the cooling fins for enhanced intercooler performance of up to 50%. Choose 16" x 5" or 8" x 4" Sprayer."

Can you guys read?

 

I think it would safe to say that an overall temp drop affects more than just the fuel temp, so that's not a good indication of how practical it would be to cool down the fuel only.


nah man, that's not how it works. that's how it differs from Nitrous. This system has 3 different coolers to it, fuel, air intake and intercooler sprayer. All 3 of em do the same thing, decrease the temperature of the system for which they are for. For the intake, it uses an aerodynamic light bulb with a cryogenic chamber that is mounted in a 4" segment of air tube, as the air passes over the bulb, heat is removed from air charge which gives a colder, more dense charge of air getting to the engine. They say they have dyno tests that show a reduction of intake temp of more than 35%. The fuel system has a "fuel bar" which is a billet extension of the fuel line w/a cryogenic chamber. The bar is charged w/liquid co2 and freezes to -80deg Farenheit. Heat is removed from the fuel as it passes through the bar, resulting in a colder charge. How this is practical or even necessary, I don't know. But the last system is an intercooler sprayer, im sure those of you who boost know how that works.


see the last sentence of the above post

 

:doh: and I thought I was telling/showing you guys something you hadn't seen or heard of yet

 

DEIs' home page = http://designengineering.com/

They don't have any technical papers or FAQs, just products and prices. On question, would the C02 "wear out"? I mean it is continually exchanging the heat from the fuel or air. Then after a period of time the C02 in the system wouldn't be "cold" anymore and the system would then have to be recharged. :dunno: Someone school me please.

 

yes it's not a closed system. and what I said is still valid. looking at their system to cool the intake air (not from intercooler) it's spraying directly to the intake. unless i'm looking at it wrong and it's a different part of the engine. which I doubt.


EDIT: okay so the air goes through the "bulb" but that wont have any significant affect on the airtemp. the "bulb" isn't long enough and to have an effect. also this can't be a closed loop system like an a/c. if it was, you'd need some sort of a pump to pump everything back and keep the tank under pressure.

this isn't a very good system to increase hp. you'd be better off using n2o or some sort of water injection/spray for the intercooler.

 

the CO2 doesn't wear out but it will run out. it would be nice to know how long a tank of CO2 would last and how much of a difference it would make as far as performance goes. I mean, a 35% decrease in air intake temp seems pretty significant to me, isn't that the main reason we all get CAI's, for the reduced intake temp?


what do you mean when you say "a closed system"? It doesn't inject CO2 in to the intake, the co2 is used to freeze the cryogenic chamber in the intake tubing, I don't know what the bulb is for, but nothing is being injected into the intake. same for the fuel, the fuel bar is frozen to -80deg farenheit and when the fuel passes through it, it cools it down. Same thing. How can it not increase hp, CAI increases hp over short ram?

 

The above (and very crude) picture is of two of their systems in unison. The blue rectangular bar is their fuel bar (seperate system). Hot air enters the air filter and passes over and through the square tubing that contains the C02. Through the magical wonders of an endothermic reaction the heat from the intake charge is cooled. On goes the newly cold air through the t-body and eventually the combustion chamber. The carbon dioxide is NOT introduced anywhere but the system its self. None of it goes to the combustion chamber. An engine in its rawest form is nothing but an air pump. Air=oxygen. If we throw a bunch of carbon dioxide into the engine it would kill it's efficiency. We (humans) also breath oxygen and exhale carbon dioxide. What would happen to us if we tried to "breathe" and live on the carbon dioxide we exhale? Asphyxiation. The carbon dioxide in this system is compressed, and when the stuff is compressed to a certain point it turns into a liquid and is verrrrrry cold. Venting this concoction into the atmosphere turns it back into a gas but is still very cold. The only system that is not closed is their CryO2 Intercooler Sprayer. It sprays the C02 directly onto the intercooler. I am also doubtful on how efficient the intake system could be as not all of the air would be going over the tubing. Goto the back of your fridgerator and hold your hand near the coils, the air is cold. These systems (save the intercooler setup) are working on the axact same principals.

 

except that co2 needs to expand in order to cool. thus just having the "bulb" filled with co2 will have little affect in the air intake temp.


but either way I think we both agree this is just a big farse. :twothumbsdown: