Originally Posted by GTisRule

ypical Engine Combustion:

Fuel + Air => Hydrocarbons + Nitrogen Oxides + Carbon Dioxide + Carbon Monoxide + water

Hydrocarbon emissions are fragments of fuel molecules, only partially burned. See Toxicity of Benzene and other Hydrocarbons in exhaust.

Hydrocarbons react in the presence of nitrogen oxides and sunlight to form ground-level ozone, a major component of smog. Ozone irritates the eyes, nose, throat and damages the lungs. A number of exhaust hydrocarbons are also toxic, some with the potential to cause cancer.

Nitrogen Oxides Under high pressure and temperature conditions in an engine, nitrogen and oxygen atoms react to form nitrogen oxides. Nitrogen oxides, like hydrocarbons, are precursors to the formation of ozone and contribute to acid rain. Catalytic converters in car exhaust systems break down heavier nitrogen gases, forming nitrous oxide (NO2) - 300 times more potent than carbon dioxide as a greenhouse gas. Nitrous oxide makes up about 7.2 percent of the gases that cause global warming. Vehicles with catalytic converters produced nearly half of that nitrous oxide. Nitrous oxide also comes from nitrogen-based fertilizers and manure from farm animals.

Carbon Monoxide Carbon monoxide (CO) is a colorless, odorless, poisonous gas, a product of incomplete burning of hydrocarbon-based fuels. Carbon monoxide consists of a single carbon atom and a single oxygen atom linked together (CO), the product Carbon monoxide of incomplete combustion of fuel. Most CO is produced when air-to-fuel ratios are too low in the engine during vehicle starting, when cars are not tuned properly, and at higher altitudes, where thin air reduces the amount of oxygen available for combustion. Two-thirds of the carbon monoxide emissions come from transportation sources, with the largest contribution coming from cars. In urban areas, the passenger vehicle contribution to carbon monoxide pollution can exceed 90%. Read more about Carbon Monoxide

Carbon Dioxide U.S. Environmental Protection Agency (EPA) originally viewed carbon dioxide as a product of "perfect" combustion, but now views CO2 as a pollution concern. Carbon dioxide is a greenhouse gas that traps the earth's heat and contributes to Global Warming.


Accidentally posted, wasn't done yet.... No I'm not way out of my league...

As the highlighted area above in bold shows, it's where my information came from. Note: I did say in the original post, I was certified in the mid 90's, and that's where my information comes from.

NOx doesn't form until combustion temperatures reach over 2200F, which is well above the melting point of Aluminum (1200F I think?) It's not produced by your average car engine that's TUNED, which started this whole debate.

So, back to what I orginally said, the biproduct of a properly tuned engine is C02 and H20. So go take some more e-roids and find someone else to nerdrage on...

Originally Posted by GTisRule

ypical Engine Combustion:

Fuel + Air => Hydrocarbons + Nitrogen Oxides + Carbon Dioxide + Carbon Monoxide + water

Hydrocarbon emissions are fragments of fuel molecules, only partially burned. See Toxicity of Benzene and other Hydrocarbons in exhaust.

Hydrocarbons react in the presence of nitrogen oxides and sunlight to form ground-level ozone, a major component of smog. Ozone irritates the eyes, nose, throat and damages the lungs. A number of exhaust hydrocarbons are also toxic, some with the potential to cause cancer.

Nitrogen Oxides Under high pressure and temperature conditions in an engine, nitrogen and oxygen atoms react to form nitrogen oxides. Nitrogen oxides, like hydrocarbons, are precursors to the formation of ozone and contribute to acid rain. Catalytic converters in car exhaust systems break down heavier nitrogen gases, forming nitrous oxide (NO2) - 300 times more potent than carbon dioxide as a greenhouse gas. Nitrous oxide makes up about 7.2 percent of the gases that cause global warming. Vehicles with catalytic converters produced nearly half of that nitrous oxide. Nitrous oxide also comes from nitrogen-based fertilizers and manure from farm animals.

Carbon Monoxide Carbon monoxide (CO) is a colorless, odorless, poisonous gas, a product of incomplete burning of hydrocarbon-based fuels. Carbon monoxide consists of a single carbon atom and a single oxygen atom linked together (CO), the product Carbon monoxide of incomplete combustion of fuel. Most CO is produced when air-to-fuel ratios are too low in the engine during vehicle starting, when cars are not tuned properly, and at higher altitudes, where thin air reduces the amount of oxygen available for combustion. Two-thirds of the carbon monoxide emissions come from transportation sources, with the largest contribution coming from cars. In urban areas, the passenger vehicle contribution to carbon monoxide pollution can exceed 90%. Read more about Carbon Monoxide

Carbon Dioxide U.S. Environmental Protection Agency (EPA) originally viewed carbon dioxide as a product of "perfect" combustion, but now views CO2 as a pollution concern. Carbon dioxide is a greenhouse gas that traps the earth's heat and contributes to Global Warming.


Accidentally posted, wasn't done yet.... No I'm not way out of my league...

As the highlighted area above in bold shows, it's where my information came from. Note: I did say in the original post, I was certified in the mid 90's, and that's where my information comes from.

Originally Posted by GTisRule

NOx doesn't form until combustion temperatures reach over 2200F, which is well above the melting point of Aluminum (1200F I think?) It's not produced by your average car engine that's TUNED, which started this whole debate.

So, back to what I orginally said, the biproduct of a properly tuned engine is C02 and H20. So go take some more e-roids and find someone else to nerdrage on...

Originally Posted by fuzzydoodle

"You're outta your element here Donnie!!"

"Shomer ****ing shabbos!"

I had to.

Originally Posted by Poik242

This is not true.

Catalytic converter technology has come a long way and is necessary to have on cars now and in the future. Lots of vehicles that drive down the road actually emit cleaner air out of the tail pipe than the air around them. Now, I don't run a cat on any of my cars because I'd rather have power than be a hippie, but I realize it's a pretty selfish thing, because if everybody did that on their cars it would be a huge problem.

Originally Posted by McDougal

It is my understanding that if you get caught running no cat it is a huge ticket.

Just get one of these

http://www.siliconeintakes.com/produ...006979d47e9d65

Originally Posted by josel_atr

yeah. i was able to sense incoming headaches on that civic though. i just spent $$$ on a new clutch on the evo. i wasnt going to spend $$$ on the civic. plus, i didnt realize how hard it was to manage two cars. i had the SI as a second car back when i had the 350z but the evo is good for all season - no soft top to be baby-ed in the winter.