Originally Posted by
thealienfromuranus
EGT should not increase with an EGR delete as replacing the hot recirculated unburnt fuel with oxygen should help the fuel burn more efficiently and lower the intake temp
It also stops build up on the turbo vanes reducing the chances of them sticking and causing over boost
Worth while modification to improve the longevity
EGR is there to lower combustion temps. It's all about controlling NOX, and lowering combustion temp by addition of exhaust lowers NOX. More O2, faster flame front, higher temps, more NOX. The reality for a normal car is that you are right, and you don't see any major rise in EGT's, but if you really look into it, that's the theory. In a gasser EGR is about reburning unburnt fuel, in a diesel it's about controlling combustion temps.
Absolutley agree that more O2 from deleting EGR equals less soot, and that's a good thing, especially with a DPF.
Last edited by Greg Roles; 02-11-2011 at 05:07 PM.
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