[jeff88]

Originally Posted by t vago

Heh - my EGR experiment that I did earlier this year took me into the realm of MPGuino. Soon, hopefully, I can go back into EGR.

I remember when you had started this, but missed the continuation of the experiment. A 7.7% increase is definitely well worth it. What caused the hiatus (so to speak) of the experiment?

I found this site, learned a few things... Allpar

I'm wondering, if the EGR decreases the temperature of the combustion, would increasing the EGR amount into the intake mean an even colder combustion (more mass means harder to heat up)? If so, would colder spark plugs be of benefit?

At the end of the EGR section, it says the reason EGR increases FE (among other things) is because it increases the mass on the piston, helping to force it down. I wonder if the reason why pgfpro's turbo helped increase mileage was because it helped increase the pressure on the piston, forcing it down against the vacuum.