Using the winter to develop some thoughts about engine performance I thought about EGR.

From my understanding EGR absorbs temperature from the combustion process.
Its a method of regulating peak temperature to reduce NOx formation while still producing adequate average cylinder pressure to make power goals.
The problem with EGR it occupies space, so to get more oxygen in the cylinder, you've got to have more boost and more intercooling.
Earlier engines have 5 to 7 percent EGR. That could be used to make power with deleting EGR.

Tecnically it won't be difficult to delete EGR, it's only bolted to the intake manifold via a simple vacuum activated gate.
But the metal hoses and of course the exhaust gasses deliver huge amounts of heat and dirt into the intake manifold.

Is it worth to delete it?
As I understand EGR is only part throttle activated.

 

To make it more easy to understand I added a picture of the exhaust gas recirculation circuit.
A simple plug could interrupt the connection between the hot exhaust side and the cold intake side.

 

5-7% is alot

 

I was talking to a Mercedes engineer and he mentioned future engines will have 18-25% EGR to meet emission standards. Thats 1/5 to 1/4 wasted air!

He also told me EGR consumes fuel. So deleting EGR would also save fuel?

 

very understandable.........NOX emissions are hugh so the FEDS are doing everything they can to reduce them

My self I would think a solinoid valve vs. plug activated from the cab would be better so incase of emmissions spot testing

 

Do they do that in the US?
Pierburg offers a magnetic valve.
Or a simple disconnect in the power supply via a switch could solve that problem.

 

EGR days are counted- I just found this: