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BlackT
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« on: March 13, 2019, 01:59:05 PM »
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Go to page 5, where all mehanical and electrical problems are solved First at all don't judge me and my setup, please  The engine is AEB, AWT ECU. Injectors 310 cc from AGU engine, MAF is from 2.5tdi with 3 inch housing, and MAP sensor is 2 bar from 1.9tdi. Turbo is K03 hibrid with K04 compressor wheel Car starts, runs, pull with no isssues. Even the fuel trim's are great. On stock flash engine hold presure on 0.5 bar, MAF go to 125 g/s so everything what engine desire it get's. (In real world the presure is 0.8 bar and flow rate is around 170 g/s  schh ECU doesen't know about that ) So for stage 1 tune I change LDRXN and LAMFA, but I only get 1-2 psi more than on stock flash. Actual boost doesn't follow desired, WG is at 70% KFLDHBN as I can see is no problem As I can see the ECU follow about 90% of KFMIRL, so do i need to change this map?I don't have clue what to do next? |
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« Last Edit: April 27, 2019, 10:29:47 AM by BlackT »
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nyet
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« Reply #1 on: March 13, 2019, 02:32:58 PM »
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You need more IMX
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BlackT
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« Reply #2 on: March 13, 2019, 02:58:48 PM »
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That make sense, thank you very much  . I will try it tomorrow. And post here results |
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prj
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« Reply #3 on: March 13, 2019, 03:07:34 PM »
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It's not a tuning problem I think.
You have on 6000 rpm 95% DC and only 0.55 bar boost.
A working K03 turbo at this DC should make around 0.9 bar boost if not more.
Also in the midrange, at 75% DC a standard K03 turbo will make 1.1-1.2 bar.
I would check for boost leaks, check dump valve is working etc.
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prj
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« Reply #4 on: March 13, 2019, 03:12:48 PM »
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Here is an example WGDC vs actual boost chart from a car with everything working correctly.
I have dozens of them and they all look pretty much the same.
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BlackT
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« Reply #5 on: March 13, 2019, 03:34:38 PM »
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It's not a tuning problem I think.
You have on 6000 rpm 95% DC and only 0.55 bar boost.
A working K03 turbo at this DC should make around 0.9 bar boost if not more.
Also in the midrange, at 75% DC a standard K03 turbo will make 1.1-1.2 bar.
I would check for boost leaks, check dump valve is working etc.
The MAP sensor is from 1.9tdi so it lie to ECU. The ECU read 0.55bar, but the real boost is around 0.9 Stock k03 will not go over 1 bar boost (even at peak) on AEB with front mount intercooler. At least not from my experience This is K03-029 stock, big front IC, N75 connected to 12V all time https://youtu.be/d2uKm-WbU9kAs you can see it can not produce to much boost. I try several more turbos(all in good shape) but there was no signifient difference. Soo 1.2 bar on 75% WGDC with stock k03 is only possible in hot days with small intercooler, but that is not booost, it is hot air. Maybe I am wrong but that is my experience so far |
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Blazius
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« Reply #6 on: March 13, 2019, 03:46:30 PM »
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The MAP sensor is from 1.9tdi so it lie to ECU. The ECU read 0.55bar, but the real boost is around 0.9 Stock k03 will not go over 1 bar boost (even at peak) on AEB with front mount intercooler. At least not from my experience This is K03-029 stock, big front IC, N75 connected to 12V all time https://youtu.be/d2uKm-WbU9kAs you can see it can not produce to much boost. I try several more turbos(all in good shape) but there was no signifient difference. Soo 1.2 bar on 75% WGDC with stock k03 is only possible in hot days with small intercooler, but that is not booost, it is hot air. Maybe I am wrong but that is my experience so far Boost is boost regardless of its temperature. Yes cooler air at the same boost level will provide better perfomance. Also generally speaking a bigger intercooler "doesnt take" a ton boost away, it just increases lag a tiny bit but the pressure drop will be lower than a tiny one, depends on the quality, and design of it. Why dont you calibrate the MAP to read actual ? |
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nyet
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« Reply #7 on: March 13, 2019, 04:09:56 PM »
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The MAP sensor is from 1.9tdi so it lie to ECU. The ECU read 0.55bar, but the real boost is around 0.9
This is inexcusable. |
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fknbrkn
Hero Member
Karma: +177/-18
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Posts: 1402
mk4 1.8T AUM
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« Reply #8 on: March 13, 2019, 04:16:38 PM »
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On stock flash engine hold presure on 0.5 bar
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but I only get 1-2 psi more than on stock flash.
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The ECU read 0.55bar, but the real boost is around 0.9
....
Stock k03 will not go over 1 bar boost (even at peak) on AEB with front mount intercooler. At least not from my experience
Do the math |
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BlackT
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« Reply #9 on: March 13, 2019, 04:30:57 PM »
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It's not a tuning problem I think.
You have on 6000 rpm 95% DC and only 0.55 bar boost.
A working K03 turbo at this DC should make around 0.9 bar boost if not more.
lso in the midrange, at 75% DC a standard K03 turbo will make 1.1-1.2 bar.
I would check for boost leaks, check dump valve is working etc.
Now i looked under the hood On my N75, the boost and WG hoses are switched,my bad. So first tomorrow I will put them to original state Boost is boost regardless of its temperature. Yes cooler air at the same boost level will provide better perfomance. Also generally speaking a bigger intercooler "doesnt take" a ton boost away, it just increases lag a tiny bit but the pressure drop will be lower than a tiny one, depends on the quality, and design of it.
Why dont you calibrate the MAP to read actual ?
airdensity is matter. Colder air,less pressure is the same air density as hot air, high pressure. Generaly speaking... Of course there is formuls to calculate relationship. If you have K03 and lets say it boost up around 1.2-1.3 bar the outlet temp is around 80-90C. If you cool down that air with big IC to around 20 C. You will have same density, but boost will drop beacuse colder air is schrinked. I am sorry I can't explain it better beacuse that is what I can do with my englisch. But I think you get the point, hot air expands(as any other fluid), in closed sistem it build more pressure. I didn't calibrate my MAP, beacuse for now there is no need to do it. One more time I apologize if I am rude in some sentece. My englesich is not best, so sometimes it can look like I am rude or arogant. But that is not reallity, I really respect all you guys and everything you do |
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nyet
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« Reply #10 on: March 13, 2019, 04:33:39 PM »
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I didn't calibrate my MAP, beacuse for now there is no need to do it.
Incorrect. |
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BlackT
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« Reply #11 on: March 13, 2019, 04:45:02 PM »
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Incorrect.
In future i have plan to calibrate MAF and MAP. When I have enought time and knowledge to do it. But for now the car is running realy fine. I know that is not by all rules, but if is it working why is so neccesery to do it? Do the math Sorry but i dont get it? |
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Blazius
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« Reply #12 on: March 13, 2019, 04:51:36 PM »
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Now i looked under the hood
On my N75, the boost and WG hoses are switched,my bad. So first tomorrow I will put them to original state
airdensity is matter. Colder air,less pressure is the same air density as hot air, high pressure. Generaly speaking... Of course there is formuls to calculate relationship.
If you have K03 and lets say it boost up around 1.2-1.3 bar the outlet temp is around 80-90C. If you cool down that air with big IC to around 20 C. You will have same density, but boost will drop beacuse colder air is schrinked.
I am sorry I can't explain it better beacuse that is what I can do with my englisch. But I think you get the point, hot air expands(as any other fluid), in closed sistem it build more pressure.
I didn't calibrate my MAP, beacuse for now there is no need to do it.
One more time I apologize if I am rude in some sentece. My englesich is not best, so sometimes it can look like I am rude or arogant. But that is not reallity, I really respect all you guys and everything you do
yes it matters, i know how it works, but all i am saying 1.2bar is 1.2 bar hot air is still air  |
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nyet
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« Reply #13 on: March 13, 2019, 04:57:30 PM »
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But for now the car is running realy fine. I know that is not by all rules, but if is it working why is so neccesery to do it?
Sorry but i dont get it?
Your car is definitely NOT running fine, from the looks of your logs. I would not drive it. |
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fknbrkn
Hero Member
Karma: +177/-18
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Posts: 1402
mk4 1.8T AUM
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« Reply #14 on: March 13, 2019, 05:10:17 PM »
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In future i have plan to calibrate MAF and MAP. When I have enought time and knowledge to do it. But for now the car is running realy fine. I know that is not by all rules, but if is it working why is so neccesery to do it?
Sorry but i dont get it?
if its worked then why you start the topic? its a primary load inputs and in your case theyre should be calibated fine 170gs its a typical k03 limit youre basically running some kind of st1 |
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