Re: Blocking off emmission equipment on new 9L mot
Hmmm..
Well my brothers 04 Ford with the 6.0 got better milage than his 7.3 and it had an EGR. Then we disconnected the EGR because we don't like the idea of an engine eating it's own poop and it averages 1.4mpg better with the EGR disconnected. How do you explain that? It also has more low end and produces less black smoke.
These newer EGR engines are getting better fuel economy than their predecessors, but just think how much better they could do if they didn't have to eat 10% of their own poop.
The point in adding the exhaust gas back into the combustion chamber is to reduce the maximum temperature during combustion. But, the lower the combustion temperature the less expansion of the gasses you get. So in order to get the same net force on top of the piston you need to add more fuel to get a larger, cooler reaction inside the cylinder. More fuel, same power = less efficient. Maybe you are the one that needs to learn about thermodynamics.
On a side note, while I'm thinking of it, there are more problems associated with the EGR than just the reduction in fuel efficiency. With the introduction of exhaust gas back into the combustion chamber you are also introducing soot back into the engine, water vapor, acids and other contaminates that will increase the acidity of the engine oil, cause more piston and cylinder wall wear, more bearing wear and reduced oil life. Through the cooler less NOx producing combustion cycle the engine will also produce more unburnt hydrocarbons, PARTICULATES, carbon monoxide and carbon dioxide. So your little line of keep the engine clean inside and out, doesn’t hold true if you have an EGR on it. You are adding contaminants directly into the intake of the engine, making it not clean on the inside – inside the combustion chamber or the oil pan- and this poor combustion leads to it being not clean on the outside –out the pipe- and this is the problem that lead the emissions train to another series of issues that were addressed with the DPF. Then if you have followed on road engines the DPF lead to another group of problems for the consumer with increasing oil levels, decreased oil life, decreasing fuel economy, decreased satisfaction and more money out of pocket.
So. Dr.Farmer. Go back and learn thermodynamics, if you already have once do it again because obviously you missed something. Learn a little mechanical knowledge because obviously you have no clue how an engine even runs. Also, if you are going to go busting into a conversation and call people ignorant, you better know who your audience is.