Contour Enthusiasts Group Archives Forums Modifications 3.0L Duratec EGR Delete

EGR = added octane= slower burn of fuel and resistance to detonation. Slower burn (slower/lower rise in cyl gas temps/pressures) reduces NoX(very high compression ratios give high NoX)...Egr does NOT operate below optimum engine operating temps and not all the time. In most calibrations it operates on steady cruise driving and on overrun conditions. Down side of EGR delete 'can' be pinging so an ignition retard (loss of power) may be required with no EGR.