|
judeisnotobscure
|
 |
« on: March 19, 2011, 08:06:02 PM »
|
|
|
I'm missing something in my tune. stock turbos, stock fueling, b5 s4 mbox.
my n75 is cutting duty cycle at 6000rpms for some reason... I'm having trouble narrowing it down.
What map should i concentrate on other than kfldimx?
something is telling the n75 to cut duty cycle
here are logs and the bin.
the only code is negative deviation.
|
|
|
|
« Last Edit: March 20, 2011, 07:44:26 PM by judeisnotobscure »
|
Logged
|
I have a b5 s4
but i just want to dance.
|
|
|
|
elRey
|
|
« Reply #1 on: March 19, 2011, 08:24:37 PM »
|
|
|
Is it cutting duty to match a lower requested boost? Or is requested boost still higher than actual and duty is being cut away?
|
|
|
|
|
Logged
|
|
|
|
|
judeisnotobscure
|
|
« Reply #2 on: March 19, 2011, 08:28:13 PM »
|
|
|
Requested boost is never met, actual is lower the whole time.
|
|
|
|
|
Logged
|
I have a b5 s4
but i just want to dance.
|
|
|
|
elRey
|
|
« Reply #3 on: March 19, 2011, 08:38:23 PM »
|
|
|
look at KFLDHBN. I'm not sure is that limit is reflected requested or not. I thought it was,but worth a look.
|
|
|
|
|
Logged
|
|
|
|
|
judeisnotobscure
|
|
« Reply #4 on: March 19, 2011, 08:44:50 PM »
|
|
|
I have this map adjusted to 2.4 or there about at red line, maybe I'll set it all to 3 to see if that's the issue
|
|
|
|
|
Logged
|
I have a b5 s4
but i just want to dance.
|
|
|
|
judeisnotobscure
|
|
« Reply #5 on: March 19, 2011, 09:42:50 PM »
|
|
|
that was not the cause.
my 93 octane revision is doing it as well, but at 6000 rpms.
|
|
|
|
|
Logged
|
I have a b5 s4
but i just want to dance.
|
|
|
silentbob
Full Member
Karma: +30/-8
 Offline
Posts: 141
|
|
« Reply #6 on: March 20, 2011, 12:13:57 PM »
|
|
|
Do you have diagnostic codes in your fault memory?
|
|
|
|
|
Logged
|
|
|
|
|
judeisnotobscure
|
|
« Reply #7 on: March 20, 2011, 01:07:14 PM »
|
|
|
I will check, this happened in a couple different cars, and a couple cars haven't had an issue . These are all people testing my file, so its not my car.
|
|
|
|
|
Logged
|
I have a b5 s4
but i just want to dance.
|
|
|
|
Rick
|
|
« Reply #8 on: March 21, 2011, 04:29:48 AM »
|
|
|
I'll go over your file this evening after work.
Rick
|
|
|
|
|
Logged
|
|
|
|
Tony@NefMoto
Administrator
Hero Member
Karma: +132/-9
Offline
Posts: 1389
2001.5 Audi S4 Stage 3
|
|
« Reply #9 on: March 21, 2011, 10:31:55 AM »
|
|
|
I haven't looked at your tune yet. But did you raise the maximum compressor pressure ratio?
|
|
|
|
|
Logged
|
|
|
|
|
judeisnotobscure
|
|
« Reply #10 on: March 21, 2011, 10:40:51 AM »
|
|
|
Yes... I even raised it to 3 across the board and tested to see if that was the issue. No dice.
|
|
|
|
|
Logged
|
I have a b5 s4
but i just want to dance.
|
|
|
Tony@NefMoto
Administrator
Hero Member
Karma: +132/-9
Offline
Posts: 1389
2001.5 Audi S4 Stage 3
|
|
« Reply #11 on: March 21, 2011, 11:07:32 AM »
|
|
|
According to your logs, the specified boost pressure is good, and the specified load is good, and the N75 duty cycle is between 92% and 95% up until 6000rpm. Above 6000rpm the N75 duty cycle drops off, but the specified load and specified boost pressure still stay high, and the throttle valve is even staying at 100%.
Could it be that you are outside the efficiency zone of the turbo at this point?
|
|
|
|
|
Logged
|
|
|
|
|
judeisnotobscure
|
|
« Reply #12 on: March 21, 2011, 11:10:16 AM »
|
|
|
Even if it was.outside its efficiency, wouldn't the n75 continue to function to allow requested load
|
|
|
|
|
Logged
|
I have a b5 s4
but i just want to dance.
|
|
|
|
judeisnotobscure
|
|
« Reply #13 on: March 21, 2011, 11:21:31 AM »
|
|
|
I will messing with ldrxn up around 6k rpms to see if that will fix it. Thanks for the ideas.
|
|
|
|
|
Logged
|
I have a b5 s4
but i just want to dance.
|
|
|
Tony@NefMoto
Administrator
Hero Member
Karma: +132/-9
Offline
Posts: 1389
2001.5 Audi S4 Stage 3
|
|
« Reply #14 on: March 21, 2011, 11:26:14 AM »
|
|
|
Even if it was.outside its efficiency, wouldn't the n75 continue to function to allow requested load
You're right, in that case the N75 duty cycle shouldn't be dropping. |
|
|
|
|
Logged
|
|
|
|
|
