Log Review Please! Stage 2

[Malmhead]

Malmhead, another apology. Checked my notes and you were on the right track.

This is the KFDLULS error.

Stock configuration in most conditions:

|requested - actual| > 250 mbar (3.6 psi) for more than 0.5 seconds.
^ Absolute value ^

The map just needs to be fudged a little on initial ramp.

In the case of your logs though it looks like hardware causing limp.

No problem, but I'm not sure what you mean by "hardware causing limp"?

The reduced boost experienced here is not a true limp mode, I can do back to back 3rd gear runs that look just like this over and over again.

Or do you mean something like it still looks like the N75 (or other hardware) is bad?

I can reflash with the tamer (stage 1 91) tune and log as well if you think that's a good idea to get an idea of what's going on with the car.

[zillarob]

Does he need to fudge a safety limit? Or is there a map in me7 that would get the boost in check?
35% throttle valve at 92% pedal seems a little disproportionate. 35% might be fine at stock 9psi but 18psi isnt making it through as easily.
How do you tell it 35% is no bueno, 60-80% seams a little more realistic.

[sqitis]

Ok I'm going to throw this out there but not sure if the mods will care. Ok so where and how do I change the value(s) for this map? Also how do I run ME7Check with the bin when I'm done?

[zillarob]

Set up me7check like this http://nefariousmotorsports.com/foru...sg3184#msg3184

Can send the bin to me if you want me to check too. ygpm

[zillarob]

Abort!

You need the mbox def

[zillarob]

This is what it should look like





This works, but is what the wiki says not to do

[sqitis]

I have an M-box tune due to changing my MAF over to an Hitachi.

[zillarob]

In your pic you are using the abox .xdf definition

Ygm, sent you the xdf
Looks like you dont need to fix checksums if you change that map for some reason. Check with me7check to be safe though.

[sqitis]

This is what it should look like





This works, but is what the wiki says not to do

Which one do you use?

[zillarob]

The 2nd pic is from the vast stg1 tune on my car.

BE CAREFUL, you are playing with fire if you turn off safety features.

[sqitis]

The 2nd pic is from the vast stg1 tune on my car.

BE CAREFUL, you are playing with fire if you turn off safety features.

Ok I updated my original post. So what would be a "safe" number to put in these tables?

[Malmhead]

Ok I updated my original post. So what would be a "safe" number to put in these tables?

Well, what NVR says he wants to do is adjust the N75 a bit, which should blow off the extra boost over the desired if I'm understanding what he's saying... something like this would obviously be the safest route.

According to MY log, there is a deviance of, at most, 306.84 mbar over the actual, so to work around the problem the way you're going about it, for MY CAR you'd set that table to say, 310 instead of 250/300. How safe this is? I don't know. Will you blow up your engine? I don't know. Either way, you shouldn't be using my logs to tune your car.

As zillarob said, you are playing with fire.

[zillarob]

My experience is limited to coding stuff out, never tried any tuning.

Imho, the stock numbers are safest. I think need to find out why at 92% pedal the ecu thinks it is ok to request 35% throttle valve.

[phila_dot]

The throttle is closing because of his deviation. It is throttle cut.

Malmhead,

Do you have a boost gauge? Your actual boost is over the MAP limit (your logs aren't showing how far past the MAP you are actually boosting). Your ecu is losing all control of boost and IMO you have an N75/wastegate problem (hardware). The only thing saving you is that load is being controlled by LDORXN because of the KFDLULS code and the throttle is closing because predicted boost deviation is greater than 300 mbar (4.35 psi). Thank NVR for not removing the safety features.

sqitis,
You need to study your log and determine if your deviation on initial boost is caused by spool rate. If so, determine how much you need to increase the values in KFDLULS. The values are deviation in mbar.

[Malmhead]

The throttle is closing because of his deviation. It is throttle cut.

Malmhead,

Do you have a boost gauge? Your actual boost is over the MAP limit (your logs aren't showing how far past the MAP you are actually boosting). Your ecu is losing all control of boost and IMO you have an N75/wastegate problem (hardware). The only thing saving you is that load is being controlled by LDORXN because of the KFDLULS code and the throttle is closing because predicted boost deviation is greater than 300 mbar (4.35 psi). Thank NVR for not removing the safety features.

Yes sir I do have a boost gauge.

Reviewing the actual data, I do see that I am at the limit (2543.52) for about 0.6 seconds. In the car, I usually only see 20 psi max on the gauge before the throttle is cut. That said, I have seen it go past the 20psi tick into the 21/22 range for the briefest of moments before the throttle is cut. However, I've never seen it higher.

I should have a new N75 arriving by Wed/Thurs and will post new logs then with the results.

[Malmhead]

So uh.... lol?

[NOTORIOUS VR]

mint condition :)

[Malmhead]

mint condition :)

Whew! Glad we sorted that out then!

[sqitis]

Yea that'll buff out!!

[phila_dot]

PID is pissed.

Any information to go along with these logs? Did you change something?

[sqitis]

^This! Malmhead logs are all over the place! What is this from? I've never seen that before. Got to be boost leak or bad hardware somewhere.

[Malmhead]

PID is pissed.

Any information to go along with these logs? Did you change something?

Since I wasn't convinced it was an issue with NVR's tune I flashed with Jude's Stage 1 tune last night and those are the logs from the attempt. Obviously my overboost issue is due to something else and is not related to NVR's tune.

[Malmhead]

Well, it was the N75, thanks guys...

[bigdo26]

I had the charge pressure deviation error (along with a couple others) that seemed to be linked to a dirty MAF - something else to check. Cleaned mine and car has pulled hard ever since! Same tune as OP I believe

[NOTORIOUS VR]

I am going to assume the logs were taken by setzi's logger and not ECUx... because that shit is whack! LOL

[sqitis]

I had the charge pressure deviation error (along with a couple others) that seemed to be linked to a dirty MAF - something else to check. Cleaned mine and car has pulled hard ever since! Same tune as OP I believe

Well I got the charge pressure deviation code right after installing new Hitachi and switching to m-box tune and then did a couple of pulls on this same tune. It appears to come back after I clear it. I guess I will wait for NVR to modify the tune so that it can adjust to more boost.

[mightemouce]

What gear was this in? 1st? or 2nd? or down a huge hill?

[NOTORIOUS VR]

Well I got the charge pressure deviation code right after installing new Hitachi and switching to m-box tune and then did a couple of pulls on this same tune. It appears to come back after I clear it. I guess I will wait for NVR to modify the tune so that it can adjust to more boost.

I will maybe be able to put up a revision (with a slightly softer D-term in the PID control) that I am hoping should solve the slight overshoot...

Just have no time at the moment, and on top of that I'm out of the country for work.

[sqitis]

I will maybe be able to put up a revision (with a slightly softer D-term in the PID control) that I am hoping should solve the slight overshoot...

Just have no time at the moment, and on top of that I'm out of the country for work.

I understand, take your time! LOL Car still runs fine for now. Thank you btw!

[NOTORIOUS VR]

Lol.

Just getting it out of the way? or?

lol WTF

[mightemouce]

Huh? apparently someone changed the picture on their host?

[AudiSportB5S4]

Just getting it out of the way? or?

lol WTF

Haha, I guess some tool changed the image from their link. It was that bullshit acceleration chart of a "stage 2" going off a cliff hitting .7Gs... Fake ass TUNA, fake ass results..

[sqitis]

Did a couple more pulls and man it seems like after it trips this charge pressure code that it goes to soft limp then after a few moments it's fine again?? Not sure if that is true or not but does that make sense to you guys? And of course it doesn't send a CEL.

[phila_dot]

Haha, I guess some tool changed the image from their link. It was that bullshit acceleration chart of a "stage 2" going off a cliff hitting .7Gs... Fake ass TUNA, fake ass results..

It's pretty obvious he messed something up plotting that log.

Did a couple more pulls and man it seems like after it trips this charge pressure code that it goes to soft limp then after a few moments it's fine again?? Not sure if that is true or not but does that make sense to you guys? And of course it doesn't send a CEL.

That code will cause it to switch to a different max load table.