EGR vs. Non-EGR Intake

[texasz]

Can someone please school me on this? I'm not up on FI systems and have heard this tossed around...what's the difference? What's the advantage/disadvantage either way? Pix to compare/contrast would be great!

[webdawg1]

Non EGR pictures...just looks a lot cleaner to me...

webdawg1

[webdawg1]

EGR pictures...has the EGR pad...EGR valve and piping...extra connections for EGR related functions...etc...etc...

webdawg1

[doradox]

EGR reduces combustion temps by recirculating inert exhaust gasses back into the intake stream.

The EGR does not function during idle or full throttle operation so has no effect on WOT power.

With lower combustion temps the rest of the time the timing curve can be more aggressive which helps fuel economy.

Many driveability problems have been blamed on the EGR but many of those were really related to other systems which weren't operating at 100%. EGR merely exaggerated those deficiencies. So the EGR was blamed often because the function and purpose of EGR was not well understood.

Steve