Pollution control devices, EGR, PCV, Catalytic Converters etc.?

Question

Who here think they are a wast of time and horse power?

Answer 1

None of these things exist on non-production or racing engines.
That said, there aren't that many of those style engines on the nation's roads and highways.
If you listen to the EPA and others, their stats are pretty impressive as to the pollutants these devices have removed from the atmosphere.
While I don't subscribe to their statistical results, I have seen the air quality increase over the last 30 or so years.
As for the Catalytic Converter, It is a passive device, and if it hasn't sintered (melted down) it has NO effect on engine performance at all, nor on fuel economy.
Its function is to cause a chemical reaction (catalyze) in the exhaust, converting hydrocarbons and carbon monoxide and oxides of nitrogen into carbon dioxide and water vapor.
The PCV valve is the only way the crankcase can breath, and expel the hydrocarbon vapors, as the crankcase is sealed, and when the valve fails, the engine can't breathe, and will blow engine oil seals. It does remove large quantities of hydrocarbon by-products from the air.
As for the EGR valve, it is the only component that can make much difference on the engine's performance. But with the introduction of computer controls, even that has been mitigated.
Its purpose is to introduce already-burned exhaust into the cylinders (up to 14%) during certain conditions to reduce the temperature of the compressed and burning fuel/air mixture. There is no measurable fuel or oxygen contained in the exhaust, only nitrogen, which will not support combustion, but will expand with the already-present nitrogen in the combustion chamber. This does reduce the efficiency of the engine to some degree, but the oxides of nitrogen it reduces is certainly worth its presence.
The presence of hydrocarbons and oxides of nitrogen in the atmosphere are what causes the gray smog when exposed to the sunlight.
It is also responsible for the difficulty of many asthma sufferers and elderly people nave breathing.
While I don't think we are in the crisis that ALGORE screams about, we should certainly do what we can to reduce the emissions as far as we have here-to-fore.

Happy Motoring

Answer 2

This myth of the power-robbing pollution control devices continues to perpetrate itself. In the early days of catalytic converters, circa 1975, due to the technology of the day, they did actually create too much backpressure in the exhaust system. Coinciding with tightening emission standards, the US Federal government also began to mandate mileage standards. To meet these standards engineers detuned and reduced engine sizes as a stopgap measure. Due to massive amounts of technological evolution, this is not true today. Catalytic converters or any other pollution control device, when not damaged, are not an impediment to performance.

Answer 3

NOx are way stronger greenhouse gases than CO2. go away the cat in. Doubt you will possibly bypass MOT with some weld-up little bit of pipe the place the cat could be. Nitric acid corrosion will additionally rust the welds and drop the back container on the floor in case you're doing 70mph. you will possibly additionally could desire to re-track to unquestionably get the earnings - won't be conceivable with a trendy EMU.

Answer 4

your barking up a tall tree
all of these device's have good aspect's to them