Castrol86GXL

ok i have alot of CO2 laying around (paintball canisters) and i have a few hoses and valves and what not but i was thinking. what would happen if i shot that into the intake path (not for boost) but for a cold factor. does the CO2 harm the eninge at all?

SnowmanSteiner

I highly doubt it would harm the engine because it's already in the air that's going into the engine. But the amount that inject might displace more oxygen. I don't know if that makes sense. Um you're giving oxygen less room by taking up more of it with carbon dioxide. I don't know if the amount of C02 would be enough to actually make a difference in how well the combustion cycle goes. So I'm not sure if it would help or hurt the engine. Wow hope that helps. I think you would be better off just spraying it on the intercooler.

- Steiner

Castrol86GXL

NA

rotary>piston

CO2 doesn't burn, so it would probably inhibit the combustion process.
Maybe use an old heater core and splice it into the intake (so the air has to run through it) and run the CO2 through that. It would be like an aftercooler and could cool the air down a lot. You don't want it too cold however, because the fuel will start having trouble atomizing (that's why engines run so rich when cold).

Mr. Gadget

So the mod is a line from a bb gun to the intake??

version13

I say you sell your CO2 tanks and get compressed air tanks (they work better in paintball as well) and hook one up to your intake. They've got like 3000 psi... and make a turbo.

RETed

Can you say instant-lean-kaboom-motor?


-Ted

Schwanger

Their actually is a system that uses CO2 to cool the air coming into you throttle body. It uses liquid CO2, just like you would use in a paintball marker, that gets put into a brass bulb type thing in your intake tube. So when the CO2 becomes a gas it gets cold which makes the bulb cold the air coming into the engine passes over it and become cooler.

Chimeron

Hmm... injecting from a compressed air tank, I'm sure there's some way to give a pulse of gas so you don't run lean. That's interesting, anybody got an idea how to pulse the gas without an aftermarket comp.??

Chimeron

Now that I think about it, you'd have to regulate the pulse from the air tank as well. That might be trouble...

Gene

iTrader: (1)

They use CO2 in fire extinguishers, remember? It will displace oxygen and you will lose power.

Lazy-Rx7

any nice sized compressed air tank that would actually do the job would be way to heavy and storing it would be a problem. high pressure is also a given for a moving bomb. also these tanks are big bucks.

Chimeron

well...... umm.... wouldn't you have to say that N2O is a moving bomb as well? but oh well. Would a small tank work for just a one time boost? I just think that it would be really cool to be able to add a bit of power to my N/A without having to actually turbo it.

rotarygod

iTrader: (1)

My friend sprayed a very small shot of compressed air that is used for cleaning circuit boards in my intake once when I was at idle and the thing dman near died. The rpms went way down but the amount was so small that it didn't quite quit. It was just a quick tap too. As another example we also blew a leafblower into the intake (this is all back when we didn't know crap about cars btw) when the car was at idle and it started smoking out of the exhaust and ran like crap. Strange stuff. I think your engine will quit.

Chimeron

I'm guessing the reason that happened with just spraying compressed air was that, though you added air, there wasn't enough gas in the mixture. If you got the car to add extra gas in the mixture while forceing in the extra air, why wouldn't it work??

That's not retorical either, I really want to know. I'm willing to do the work to get this done if it's possible. The point about having large tanks being expensive and heavy is a good one, but I'm not thinking about this acting like a TII, just good enough for one or two charges.

dr0x

nitrous fuel jets

Chimeron

what about making the stock system run extra gas for a short time. I would want some way to control it (stupid aftermarket expenses). I'm betting nitrous jets would be expensive and take a good bit of work. If I'm wrong let me know how they could be used.

Digi7ech

iTrader: (1)

Well, now your talking about a nitrous setup but substituting for a less efficient gas. Compressed air shouldn't be too bad but you would have to run a wet system or something of the sort. CO2 would just be bad since that does not combust like oxygen.

With nitrous the nitrogen molecule/atom(whatever) keeps the pure oxygen from premature ignition(aka in air box/manifold)

That's why nitrous is good. It will drop temps and add a small amount of o2 with it.

Compressed air has all the other stuff as regular atmosphere so nitrogen Co2 and other stuff is in it.


Now a different way would be doing it like the N-ter coolers where you run a little radiator thing maybe through the very front of the intake tube before the Air sensor. That way it would register the colder desner air.

It would pretty much just keep heat soak away I would guess.

Lazy-Rx7

well sir, i do believe n2o is not stored at 3000psi or 4500psi+ as compressed air does... (i'm thinking paintball wise)

if there was a way, it would already be sold on the market and i'm pretty sure it has been thought of.

Chimeron

Well I thought about injecting the compressed air into the stream before the AFM, but I don't think 1)that would keep the air flow from the compressed tank as well 2) the meter would get the fuel system to add enough fuel.

I'm not really considering this the same as nitrous because I'm not adding a combustible fuel, I'm trying to get a compression similar to the effect of a turbo.

Kai

That is true. Since the mixture of gasses in compressed air is mostly nitrogen, it does not condense to a liquid when compressed. That means you need a bottle that can hold 3000-5000psi. A bottle of compressed air is just that, compressed air. Compressed air tank capacity is measured by volume and rated pressure, i.e. my paintball HPA tank is a 68 cubic inch, 4500psi tank.

CO2 and N2O both condense to a liquid when compressed over about 850psi at room temperature. That means when you have a full tank, it is about 95% full of liquid, and the little remaining gas in the tank is only around 800-1000psi. Because of this, CO2 and N2O tank sizes are measured by weight. To fill a 16oz CO2 tank, you put the empty tank on a hanging scale and fill it until it is 16oz heavier.

Both types of tanks have pressure pop-off valves. It is highly unlikely that either type of tank will explode unless it is shot or heavily damaged.

The whole idea of injecting compressed air into the engine won't work like you think it will. It is a lot more complex then you think it is. Just stick with the N2O for power, or run the CO2 through some kind of heater core in the airbox.

Chimeron

Believe it or not I DO understand how complex things get, but I do agree with you. The idea just sounded like.... fun to work on. But since I've been thinking about it there are too many freakin problems. Oh well, just have to turbo-charge it the right way. Thanks for all the input though.