The Hated EGR Valve Discussion......

I understand what you are saying, but in order to compress the air fuel mix you have to have volume to get maximum compression. If you only have half the amount of gasses to compress, your not going to get maximum compression. If you make up for the loss of volume due to the carb being closed with the EGR, then you should be able to make a higher amount of cylinder pressure during combustion with the lesser amount of fuel. In other words, you would make the combustion more effecient, because the air/fuel mix that is in the chamber would not have to make up as much volume and start pushing down on the piston if the compressed inert gasses were not there.