EGR ,Loss of power

the EGR in its operation diverts a portion of the exhaust gas back into the motor. It does this typicaly at low revs, when the unburnt pollutants are highest in the gas stream. By diverting the exhaust gases it thereby also reduces the amount of gas flowing to the turbo, which results in some lag. By the blocking off of the EGR all the gases flow to the turbo resulting in less lag at low revs.
So it will seem harsher to some and noisier. But the gains in not haveing contaminated gases returned to the motor, and resulting wear, is in itself a great thing! :) The perception of less power is a bit harder to understand as I have not noticed it, just a smoother delivery of power. Not a feeling of instant gain of 100 hp just a smoother delivery of it .

Cheers

Quote:

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Originally Posted by schuy1

...But the gains in not haveing contaminated gases returned to the motor, and resulting wear, is in itself a great thing! :) The perception of less power is a bit harder to understand as I have not noticed it, just a smoother delivery of power. Not a feeling of instant gain of 100 hp just a smoother delivery of it.
Cheers

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I agree.

yes much smoother and less lag...I reckon pulling off the intake manifold and cleaning out that tar is well worth the dirty body.:(

South Africa got D2a's without the EGR gear fitted, and there is a factory map to suit the these variants of the motors. I'm currently running a remap which is based on the SA base map and it appears to resolve the "clatter" problem.

While the fuel maps for AUS and SA variants are pretty much identical the is one table that is radically different between the two. I'm not sure what the function of this portion of the map is, but I'll endeavor to find out.

Cheers
Paul