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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > CO2 to cool intercooler? Fine Tuned Speed Channel



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      08-17-2007, 01:29 PM   #45
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Quote:
Originally Posted by droptop335 View Post
I wonder if there's an efficient catalytic reaction (similar in principle to our exhaust cats) that can break down the C and o2...wouldn't that be cool? It could be put in the intake stream, and feed extra o2 to the engine...

Any chemies out there want to tackle this question? My chem minor only takes me so far...
what about the carbon... carbons not exactly good for an engine
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      08-17-2007, 01:30 PM   #46
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Quote:
Originally Posted by droptop335 View Post
I wonder if there's an efficient catalytic reaction (similar in principle to our exhaust cats) that can break down the C and o2...wouldn't that be cool? It could be put in the intake stream, and feed extra o2 to the engine...

Any chemies out there want to tackle this question? My chem minor only takes me so far...
U'd get the Nobel prize for this.
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      08-17-2007, 01:33 PM   #47
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what about the carbon... carbons not exactly good for an engine
IIRC, all catalysts actually absorb some of the items that are being catalyzed...don't they? I mean, don't regular cats get "coated" eventually and lose effectiveness? I guess the perfect cat solution to the intake would be one that frees the o2 molecule, but absorbs the C atom.
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      08-17-2007, 01:34 PM   #48
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stile not going to happen though <_<
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      08-17-2007, 01:38 PM   #49
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stile not going to happen though <_<
I recognize that this is likely only an academic and theoretical discussion, but it's still interesting to chat about. And who knows, stranger things have come of casual conversations like this.
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      08-17-2007, 01:40 PM   #50
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Another question would be: is there enough existing co2 in our atmosphere to warrant such a system even if it could work? Or would we still need to add a co2 injection system? Then it gets very complicated and high maintenance (refilling co2 supply).
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      08-17-2007, 03:42 PM   #51
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incredible bullshit. LOL. U really made me laff, guys

to prevent further bullshits, pls read this first:
http://auto.howstuffworks.com/catalytic-converter2.htm

Then realise there;s no added CO2 inside the system fortunately, U use it only to cool down the IC from the outside.

Also realise, that if U'd be able to break CO2 molecules to carbon and O2, U would definitely get the Nobel prize, as U'd solve the air pollution and nature devastation problem, what would be nice, as your great country is a biggest polluter. If U wont be able to do it, just try to plant more trees, it will do the trick, cuz the process U'd like to see in cats is a side effect of photosynthesis

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      08-17-2007, 03:49 PM   #52
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^^^^^

killjoy...
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      08-17-2007, 10:57 PM   #53
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CO2 Fire Extinguishers

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i believe he meant in terms of it being non combustable, i dont believe it will give up its oxygen atoms for the combustion process either, but im not sure really
Gentlemen,
I've worked with Cryogenics for the last 37 years and have really enjoyed reading this thread.

Let me start out with some basics on CO2 and its properties. It is stored in high pressure cylinders as both a gas and a liquid. Depending on the cylinder design, you can dispense either liquid or gas, but in this instance, they want to use the liquid. When the liquid is piped to the front of the intercooler and released to the atmosphere, it goes through a phase change and turns into both a cold gas and more importantly -109F dry ice snow. This would give you a much higher delta T in the intercooler and be much more effective than just a water mist, although this works to some degree.

Since CO2 puts fires out and is used extensively as a fire extinguisher, it would be good to keep the gas away from the intake. You wouldn't damage the engine, it just wouldn't run very well if at all.

Placing a block of dry ice on the intercooler to precool it before a run would accomplish the same thing, it just wouldn't be as easy to apply. Be very careful handling Dry Ice, remember is is extremely cold. As stated, CO2 is very inexpensive and should be available at most welding shops. In bulk form, it actually sells for as little as $50/ton to large users.
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      08-17-2007, 11:04 PM   #54
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Quote:
Originally Posted by Cryokid View Post
Gentlemen,
I've worked with Cryogenics for the last 37 years and have really enjoyed reading this thread.

Let me start out with some basics on CO2 and its properties. It is stored in high pressure cylinders as both a gas and a liquid. Depending on the cylinder design, you can dispense either liquid or gas, but in this instance, they want to use the liquid. When the liquid is piped to the front of the intercooler and released to the atmosphere, it goes through a phase change and turns into both a cold gas and more importantly -109F dry ice snow. This would give you a much higher delta T in the intercooler and be much more effective than just a water mist, although this works to some degree.

Since CO2 puts fires out and is used extensively as a fire extinguisher, it would be good to keep the gas away from the intake. You wouldn't damage the engine, it just wouldn't run very well if at all.

Placing a block of dry ice on the intercooler to precool it before a run would accomplish the same thing, it just wouldn't be as easy to apply. Be very careful handling Dry Ice, remember is is extremely cold. As stated, CO2 is very inexpensive and should be available at most welding shops. In bulk form, it actually sells for as little as $50/ton to large users.
i actually considered geeting a bottle of CO2 and spraying the intercooler/engine bay (away from rubber hoses maybe from underneath) with it before runs
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      08-17-2007, 11:46 PM   #55
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It is infact liquid, that is why it is measured in pounds and ounces. CO2 and NO2 both come in compressed liquids.
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      08-18-2007, 12:30 AM   #56
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As far as the idea of converting atmospheric carbon dioxide into C and O2 inside the intake tract before entering the engine, the atmosphere consists of .01 to .1% CO2 as opposed to 21% O2. The added performance would be almost zero.
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      08-18-2007, 11:58 AM   #57
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As far as the idea of converting atmospheric carbon dioxide into C and O2 inside the intake tract before entering the engine, the atmosphere consists of .01 to .1% CO2 as opposed to 21% O2. The added performance would be almost zero.
I just KNEW there were people on here that are smarter than I am...

So that would mean that any CO2 would have to be carried with the vehicle...
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      07-16-2009, 09:41 PM   #58
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i am seriously thinking of doing this, anyone got any updates?
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      07-16-2009, 10:06 PM   #59
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      07-17-2009, 12:21 AM   #60
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Anyone know where to purchase a long tube with a sprayer on the end so that you could just walk around to the front of your car and spray the intercooler before a run? Don't really need to spend the extra cash on an automated system..
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      07-17-2009, 01:28 AM   #61
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dude all this CO2 talk is nonsense. Get the NO2 mister in front of the FMIC. does amazing things. more expensive but ur not gonna spray your IC on the way to the grocery store.
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      07-17-2009, 11:23 AM   #62
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C02=bad idea. What happens if you suck a little into the intake?

Using nitrous is a much better idea.
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      07-17-2009, 11:26 AM   #63
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Quote:
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C02=bad idea. What happens if you suck a little into the intake?

Using nitrous is a much better idea
.
how much of a dry shot does that create, and can the car handle it without any tuning for it?
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      07-17-2009, 11:56 AM   #64
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Depends how much is sucked in. I sprayed 50 dry, and the car actually ran .2-.3 AFR points richer.
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      07-17-2009, 11:58 AM   #65
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Depends how much is sucked in. I sprayed 50 dry, and the car actually ran .2-.3 AFR points richer.
it was able to not only compensate but over-compensate... you should bump up the shot to a 75 shot and see what happens
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      07-17-2009, 12:19 PM   #66
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Quote:
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it was able to not only compensate but over-compensate... you should bump up the shot to a 75 shot and see what happens
Working on something else for the car right now Pretty confident you can spray a 75 shot on the car, maybe even 100. May try on a customers car soon here.
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