Thread: EGR Emulators

Originally Posted by Gally

...... It was a welcome sound to be able to turn the engine off and not hear that horrible screech as the EGR self cleans.

Huh... so that's what that sound is. It always seemed to coincide with me taking me foot off the brake after turning off the engine so I assumed it was something to do with that. Good to finally know what it is.

They're on the web-site Will.

See here

www.aulro.com/afvb/showthread.php?p=2489088

and follow link tho their website

Hmm... so paying $500 to have it done as an add-on to a remap is about market price. Plus no additional hardware to be seen/carried.

Is EGR delete/disable readily available locally via remap for the D4 2.7 and the 3.0 and also without a performance upgrade for the 3.0?

Originally Posted by Fatso

When fitting one of these on the 2.7 TD6 does the butterfly have to be removed as in the UK emulator ? .
Or are you saying that the Butterfly is always only 12% open ? , or is fully open when fitted with this emulator . Thanks 4 any info.

NO the butterfly is left in.

I think with the other emulators, they need an external power source to be wired to and they are set to output a closed EGR voltage. The EGR map is then altered to 0% open, Keeping the ecu happy.

In the early days when i tried keeping the value to closed and editing the map i would often get the P0402-22 egr excessive flow detected, until the butterfly map was edited.

My emulators fully emulate an EGR, even the clean cycle.
On all my testing I have never seen the IMT close for the purpose of the EGR's

On all the ones we have trialed and fitted in the workshop the butterfly has been left in and there have been no running issues at all, with owners reporting on average 10% fuel saving and a noticeably quieter smoother running engine.

Originally Posted by Graeme

Is EGR delete/disable readily available locally via remap for the D4 2.7 and the 3.0 and also without a performance upgrade for the 3.0?

The Emulators are all that is needed for the D4 2.7. just plug them in and drive.
I will have the 3.0 ones shortly.

Ref the fueling with the Maf change:
I have the Maf and Map correlation to less than 1% away from its fault tolerance. That figure was a bit ambitious but it works and the system is happy.

Fuel consumption has consistently been less. I think that the 1% is negligible and the fact that fresh air is going in to the engine instead of a exhaust gas / fresh air mix, counteracts any effects and surpasses it to give the 8-12% fuel saving.

Back to the engine note / sound changes,

I first noticed it on the TDV8. Whilst testing, the TDV8 EGR's are open all the time at idle on average 89% open. You can here the distinct note change of the engine when they finally close. Its reminds me a bit of what the old air injection pumps sounded like on warm up.

The TDV6 are open for much less of a time on startup but open to 85-95% when driving at around 1800-2800 Rpm. 2000prm and constant speed is the favorite setting for egr faults as they are fully open.