Prepare to ROFL (CryO2 Fuel Cooler)
10-20-2009, 08:57 PM
#21
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I'm gonna make a CO2 a/c systems. Run a nozzle through your vents and into the cab of the car. Be sure the windows are air tight and let it rip. Be cooled off in no time flat...
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10-21-2009, 08:00 AM
#27
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You wont win the arguement about this because no circumstances are being stated.
If you run a CAI on your setup (the every little help method) then spraying CO2 into your IC will help. However this help is based upon circumstances of use. The closer you mount the spray bar the better the cooling effect of the spray but the less area it can actually use to take effect. If it is then taken far enough away to reach all of the IC its cooling effect will be lower due to thermodynamics. This also means that at differing velocities you will see different effects as the airflow pattern will be different and not create the same effect.
All this sad you could just run slightly higher AFRs to be in the safe zone but would this not bog down more if the spray wasnt being used?
If you do not have a CAI then of the CO2 entering the bay perhaps 30% of it will be up for combustion assuming your filter is just on the front of the turbo. Now 30% by volume of the spray used is heading to your filter along with say the same amount of air being drawn from near the wheels (probably generous assumption) that means that your engine is now breathing a mix (39% N 8% O 52% CO2 1% Others) instead of the usual (79% N 17% O 3% CO2 1% Others). So your car would run hugely rich, 5-6AFR at least I am guessing. Of course you could map to take account of this change but you would have to use CO2 all the time and have so many engine bay turbulence factors that if you ever got a tune that was streetable I'd be hugely shocked.
If you run a CAI on your setup (the every little help method) then spraying CO2 into your IC will help. However this help is based upon circumstances of use. The closer you mount the spray bar the better the cooling effect of the spray but the less area it can actually use to take effect. If it is then taken far enough away to reach all of the IC its cooling effect will be lower due to thermodynamics. This also means that at differing velocities you will see different effects as the airflow pattern will be different and not create the same effect.
All this sad you could just run slightly higher AFRs to be in the safe zone but would this not bog down more if the spray wasnt being used?
If you do not have a CAI then of the CO2 entering the bay perhaps 30% of it will be up for combustion assuming your filter is just on the front of the turbo. Now 30% by volume of the spray used is heading to your filter along with say the same amount of air being drawn from near the wheels (probably generous assumption) that means that your engine is now breathing a mix (39% N 8% O 52% CO2 1% Others) instead of the usual (79% N 17% O 3% CO2 1% Others). So your car would run hugely rich, 5-6AFR at least I am guessing. Of course you could map to take account of this change but you would have to use CO2 all the time and have so many engine bay turbulence factors that if you ever got a tune that was streetable I'd be hugely shocked.
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10-21-2009, 08:25 AM
#28
Isn't this just a "high-tech" version of an old school fuel cooler?
Mr. Gasket 1350 Mr. Gasket Cool Can
Mr. Gasket 1350 Mr. Gasket Cool Can
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10-21-2009, 08:33 AM
#29
You wont win the arguement about this because no circumstances are being stated.
If you run a CAI on your setup (the every little help method) then spraying CO2 into your IC will help. However this help is based upon circumstances of use. The closer you mount the spray bar the better the cooling effect of the spray but the less area it can actually use to take effect. If it is then taken far enough away to reach all of the IC its cooling effect will be lower due to thermodynamics. This also means that at differing velocities you will see different effects as the airflow pattern will be different and not create the same effect.
All this sad you could just run slightly higher AFRs to be in the safe zone but would this not bog down more if the spray wasnt being used?
If you do not have a CAI then of the CO2 entering the bay perhaps 30% of it will be up for combustion assuming your filter is just on the front of the turbo. Now 30% by volume of the spray used is heading to your filter along with say the same amount of air being drawn from near the wheels (probably generous assumption) that means that your engine is now breathing a mix (39% N 8% O 52% CO2 1% Others) instead of the usual (79% N 17% O 3% CO2 1% Others). So your car would run hugely rich, 5-6AFR at least I am guessing. Of course you could map to take account of this change but you would have to use CO2 all the time and have so many engine bay turbulence factors that if you ever got a tune that was streetable I'd be hugely shocked.
If you run a CAI on your setup (the every little help method) then spraying CO2 into your IC will help. However this help is based upon circumstances of use. The closer you mount the spray bar the better the cooling effect of the spray but the less area it can actually use to take effect. If it is then taken far enough away to reach all of the IC its cooling effect will be lower due to thermodynamics. This also means that at differing velocities you will see different effects as the airflow pattern will be different and not create the same effect.
All this sad you could just run slightly higher AFRs to be in the safe zone but would this not bog down more if the spray wasnt being used?
If you do not have a CAI then of the CO2 entering the bay perhaps 30% of it will be up for combustion assuming your filter is just on the front of the turbo. Now 30% by volume of the spray used is heading to your filter along with say the same amount of air being drawn from near the wheels (probably generous assumption) that means that your engine is now breathing a mix (39% N 8% O 52% CO2 1% Others) instead of the usual (79% N 17% O 3% CO2 1% Others). So your car would run hugely rich, 5-6AFR at least I am guessing. Of course you could map to take account of this change but you would have to use CO2 all the time and have so many engine bay turbulence factors that if you ever got a tune that was streetable I'd be hugely shocked.
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10-21-2009, 09:37 AM
#31
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Would it be a bad idea to spray brakes with gaseous CO2 when running on a track? I would say it would help cooling immensely... Only problem I see is most tracks not allowing compressed anything inside the car.
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10-21-2009, 12:11 PM
#33
**** it never mind.
Intercooler sprayers work, but not well enough to warrant the cost or time it takes to install.
+ I doubt that they would like seeing a bottle of compressed gas in the car at any track aside from a drags strip, where you would spray it before running which completely solves any problem with CO2 in the intake.
^ It would work if you sprayed a light amount into a cooling duct that was going to the brakes, instead of cooling the brakes with CO2 you would be cooling the air going to them. Spraying it directly on the rotors would most likely cause premature failure.
Intercooler sprayers work, but not well enough to warrant the cost or time it takes to install.
+ I doubt that they would like seeing a bottle of compressed gas in the car at any track aside from a drags strip, where you would spray it before running which completely solves any problem with CO2 in the intake.
^ It would work if you sprayed a light amount into a cooling duct that was going to the brakes, instead of cooling the brakes with CO2 you would be cooling the air going to them. Spraying it directly on the rotors would most likely cause premature failure.
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10-21-2009, 12:39 PM
#34
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If you want an IC sprayer do what A Graham Bell says get a washer pump setup with windscreen sprayer and put the button on your steering wheel. About $3 in all and it will work as well as any other unmapped system.
BTW A Graham Bell build engines for NASCAR and F1.
BTW A Graham Bell build engines for NASCAR and F1.
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10-21-2009, 08:09 PM
#36
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Basic tests above show my assumption to be correct. Just wish there was a CAI graph for both too then we'd see the potential cooling benefits of CO2 and N2O alone. Nevermind though it pretty much closes the thread
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