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Old 09-18-2005, 10:58 AM
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CO2 injection , HuH?

I was talking to the waiter yesterday at the restruant that I go to every morning. He recently bought an '86 Toyota Supra and said it has "CO2 injection" instead of NOX. Says its almost as good and much cheaper. Says the tanks are mounted underneith the car and plumbed to the intake. Said it was installed in California before he bought it. Claims it added 50 extra horse power, as did his new air cleaner system. Now he claims the engine has over 300hp! (non-turbo V6)

I know most of his claims are bogus but what is the deal with CO2 injection? Never heard of it before.

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Old 09-18-2005, 11:27 AM
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I`ve heard it all now. Pure oxygen wouldn`t give it that much more power, not to mention, you couldn`t keep enough in a 55 gallon drum sized tank to keep it supplied for one day`s driving. The air we breathe is said to be around 75% oxygen, so I don`t think 100% would give it much more, maybe 5 horses at the most. lastly, I think this kid is a typical ricer and will tell the story to anyone who`ll believe it. Also why I`m thinking about it, any car with a factory air pump has air injection, only it`s being injected into the exhaust.
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Old 09-18-2005, 11:41 AM
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Its not pure oxygen, its added carbon dioxide. The whole thing makes no sense to me at all. Granted, he's a young kid with NO automotive savy, but i'm just curious, kinda like when I heard about propane injection for diesels.

Is carbon dioxide flamable? Isn't that the fizzy stuff in Coke and Pepsi?
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Old 09-18-2005, 12:12 PM
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CO2 injection would effectively stop the fuel air mixture from igniting, it wouldn't even run dude.

Think fire extinguisher...
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Old 09-18-2005, 01:22 PM
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Quote:
Pure oxygen wouldn`t give it that much more power
That's not true. Injecting pure oxygen would be way too violent and in an engine. N20/nitrous is oxygen mixed with nitrogen. Nitrogen is an inert gas that is added to dilute the oxygen and make it safer to run.
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Old 09-18-2005, 02:21 PM
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AHH YES, the old CO2 injection, 3/4 cam and pop up piston trick.
I have some super high perfomance muffler bearings for sale if he is interested.
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Old 09-18-2005, 03:39 PM
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i know they spray turbo intercoolers with CO2 to cool the air charge. but if you inject CO2 in a running engine it'll choke it out and die. CO2 is NOT flamable. i dont know what that guy was talking about. but if he really has co2 injection shooting it straight in the motor i'd LOVE to see it.
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Old 09-18-2005, 04:20 PM
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Isn't Carbon Dioxide (CO2) one of the main "greenhouse" gasses; a byproduct of fossil fuel combustion?

I don't see how anybody (automotive savvy or not) would believe it would make an engine run better, let alone add power.
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Old 09-18-2005, 04:56 PM
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[QUOTE=DoubleVision] The air we breathe is said to be around 75% oxygen [QUOTE]

Actually, the air we breath is around 70% Nitrogen, 20% Oxygen, and the rest is various other gasses.
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Old 09-18-2005, 06:00 PM
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Blazin72... Has it correct (79% nitrogen, 20% oxygen, and 1% other gases) and methane and floro-carbons are the problem...

CO2 would stop it dead in its tracks...
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Old 09-18-2005, 06:49 PM
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Well, i'll get to the bottom of this next time I see him. I'll go look at the car if I have to! LOL Maybe tomorrow if he's there.

Mark
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Old 09-18-2005, 06:49 PM
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I looked on ebay and I didn,t see it.There was a guy on there selling fake nitrous purge kits that used co2 cartridges.It sprayed in the air at the cowl to look like you had nitrous.Maybe that is what he has?
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Old 09-18-2005, 07:45 PM
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The closest thing I have heard of is using CO2 to spin a turbo... except the turbo does not use the exhaust at all. Instead, the CO2 is blown across the impeller to spin it up. I would imagine that would be for drag racing only as it would require so much volume to keep it up for any length of time.
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Old 09-18-2005, 09:10 PM
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97Z28 is right. I was looking through our accessory catalog the other day ( work for a parts house ) and came across that. We sell kits for cooling fuel and spray bar systems for intercoolers as well. They actually use a heat sink which you run liquid C02 and fuel through ( they don't mix ) and it's supposed to cool it down 50+ degrees. Beauty of it is it's cheap and readily available. But injecting CO2 directly into the intake? I doubt it.
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Old 09-18-2005, 10:33 PM
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For those of you that weld with a wire feed welder this thread would give you a giggle.
We use 75%co2 and 25% argon to weld with and this mixture keeps oxygen from getting to the molten metal. I think this guy was pulling your chain my friend.

Scholman
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