AND you always can remove DTC :D

copilot wrote:AND you always can remove DTC :D

Man, i already told you that if on BMW cars if you flat EGR map you`ll get limp mode:) I know that approach for VAG cars but for bmw doesnt work, thats idea. on BMW egr has another maps..another working trend, i blocked it by another maps.
What about other optimizations after blocking EGR ? Advancing Start of injection maybe? Or opening turbo vanes to avoid too much boost?

juice wrote:

copilot wrote:AND you always can remove DTC :D

Man, i already told you that if on BMW cars if you flat EGR map you`ll get limp mode:) I know that approach for VAG cars but for bmw doesnt work, thats idea. on BMW egr has another maps..another working trend, i blocked it by another maps.
What about other optimizations after blocking EGR ? Advancing Start of injection maybe? Or opening turbo vanes to avoid too much boost?

Sry Bro, missed that one somehow. There is similar maps for VAG EDC15P too by the way.

copilot wrote:

juice wrote:

copilot wrote:AND you always can remove DTC :D

Man, i already told you that if on BMW cars if you flat EGR map you`ll get limp mode:) I know that approach for VAG cars but for bmw doesnt work, thats idea. on BMW egr has another maps..another working trend, i blocked it by another maps.
What about other optimizations after blocking EGR ? Advancing Start of injection maybe? Or opening turbo vanes to avoid too much boost?

Sry Bro, missed that one somehow. There is similar maps for VAG EDC15P too by the way.

What do you know about start of injection optimization after EGR off? or did you let stock SOI in egr area? no more compensations ?

I did not touch SOI maps so far, not so confident with those and could do more harm if i would change some stuff too much. When i get some time at some point in the future, prob will do some more study on those and might worth to try. Besides on my PD torsion value via VCDS is in a well safe range anyway. Dunno if that applies for BMW s

copilot wrote:

Relic wrote:Have to agree with this.
The EGR creates the required MAF by opening the EGR valve to drop requested boost.
The modulating of the EGR valve regulates the MAF.
Once you turn the EGR off, the MAF is controlled by requested MAP only....unless torque limiters kick in first.

If you request 1000 mg/stroke MAF and the requested MAP only provides 600.... boost is not increased by closing the EGR valve.
The EGR valve is already shut because you are below 1000mg.

If MAP provides 1200 mg/stroke and requested MAF is 1000 mg/stroke than the EGR valve will opened until 1000mg/stroke is achieved.

If you are getting 1000mg/stroke at idle its because your MAP request is off the scale.
That's why you are entering limp mode and requested such boost so early will destroy the turbo.
In this case its your EGR that has been protecting your engine.

Req boost would newer go as high at idle or low rpm due torque limiter. As for more, even when WOT boost would not be allowed to go rocket high due torque limiter regardless of MAF available and there is also boost limiter so can you explain how egr protect turbo? There must be something else wrong when your cars going limp mode even when idle. And also,some people does not know that when you max out egr map on edc15 you must either disconnect vac line or use block off plate to block off infeed to valve from egr pipe...thats prob due for some reason egr valve could be become full open(don t know why) and chocke the engine i.e. you get low power at all times like mentioned before. And that s what i did i.e. vac line off on my PD edc15p. My VE TDI got MSA 15 ecu and on that one did VCDS mode(maf requested minimum 350mg/str vac line off and infeed egr pipe removed and block off plates used...done about 40k KM and not a single MIL or EGR related codes. Just to mention that may PD EDC14P engine is euro3 and still yet no issues at all.

Please re-read my post ;)
eg. "....unless torque limiters kick in first"
Please don't put words in my mouth.

Yes I know there is boost limiters.
Yes I know there is torque limiters.
I was explaining how the egr regulates MAF by adjusting the EGR valve to let more or less exhaust pass and reduce the MAF going past the MAF sensor. That is the whole point of the EGR maps with target MAF.

Of courser MAP/boost controls mass air flow when the limiters are removed.
What the hell do you think you are increasing boost for if not to increase the MAF and allow more fuel at the same lambda ?
Remove the limiters and you can request what boost you like and destroy the turbo.

Waht if EGR is totally removed? Is there any real risk to damage turbo ? I mean in full load i erquest 200mbar more

juice wrote:Waht if EGR is totally removed? Is there any real risk to damage turbo ? I mean in full load i erquest 200mbar more

Could not see how EGR would do that? When WOT EGR will be closed right away. Only limit i could see is your turbo s characteistic limits i.e. it would not surge etc but then you got exhaust(yours s is free through flow as i undestand) that holds some backpressure etc though good N75 map, boost requested and limiter should keep things under control. Besides that s why nowdays those TDI engines are so slugish they have all sorts of BS in there i.e. EGR, DPF, Cat and so on.....there isn t much fun amymore drivig them what used to be there when TDI delivered you proper torque at lower RPM range a lot quicker when you just asked for it....and that s being even told by guys who had been working for VW main dealer for years and years and been owners of diesels for long times. And all of that BS is emission related giving away cars reliability too i think.

juice wrote:Waht if EGR is totally removed? Is there any real risk to damage turbo ? I mean in full load i erquest 200mbar more

+1 as co-pilot said. As long as boost limiter is setup properly the governor/ PID feedback will protect you.
But I don't think the PID is active at very low IQ and RPM.
I am unfamiliar with your ECU function for the PCR.
This means you might be completely reliant on the VNT duty maps only at low rpm and low iq.

On mine the governor takes over from about 1500rpm I think.
This is my only concern with removing EGR.

Rpm = IQ mg/str....

These basically state above 40mg and 1500rpm = governor on
Below 38mg and 1500rpm = governor off

PCR_Monitor-qNGovOff_CUR - Work Sphere 0/1 Disable below IQ curve (25x1)

Boost Hysterisis Map 2(RPM)/mg/str

RPM
40 50 700 1000 1250 1450 1700 2000 2250 2500 2750 2850 3000 3500 3750 4000 4250 4500 4800 5000 5100 5200 5300 5400 5500
- 0 3800 3800 3800 3800 3800 2300 800 800 800 800 800 100 100 100 100 100 100 100 100 100 100 100 100 100 100


PCR_Monitor-qNGovOn_CUR - Work Sphere 1/2 Enable above IQ curve (25x1)

Boost Hysterisis Map 4(RPM)/mg/str

RPM
40 50 700 1000 1250 1500 1750 2000 2250 2500 2850 2950 3250 3500 3750 4000 4250 4500 4800 5000 5100 5200 5300 5400 5500
- 0 4000 4000 4000 4000 4000 2500 1000 1000 1000 1000 1000 200 200 200 200 200 200 200 200 200 200 200 200 200 200

As i could not get an answer from other topic, maby some profesional over here will have quick look over a EGR hysteresis change i have done for one of the guys from other forum.

Both ori and EGR off added. Any comment please i.e. changes i have done are safe?