I am curious about the effects of doing an egr
delete on the motor. I realize that by deleting the EGR
system you remove the possibility for it to fail but what effect does removing the exhaust gases that are recirculated to the intake have on the motor performance wise??
I didnt think about these things when i did my egr
delete about a year ago but what I did notice when I deleted my egr
cooler, oil cooler, added a RR kit, added a spearco intercooler, and modified my 5in exhaust to go to an 8in stack was that it now appears that my truck runs at slightly higher boost levels than it did before these modifications, resulting in lower fuel economy. And by that I mean 19-20 on the hwy to 17-18 on the hwy.
So I went looking for the culprit and the only thing that seems to make any sense of what could cause this was the deletion of the egr
My theory (and I would like your input) is that since the EGR
system is gone the engine now requires more air to get the same power recipe (mixture of air, fuel, and whatever else) as before the delete. It has been proven already that diesel engines respond very well to just about any type of fuel augmentation; whether it be propane, water/meth, nitrous (more air), natural gas, or even gasoline (check diesel power mag).
So I am thinking that the recirculation of exhaust gases, in a way, acted like a type of fuel augmentation and when I deleted that, I in turn lost some performance. What are your guys' thoughts on this??