K92
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« Reply #135 on: May 31, 2020, 07:33:31 AM »
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Tested today. It seems as if actuator has too small movement and it opens wg flap ~75-80%.
Actuator code : A480009-6
Exhaust side : 449010-1
Anyway. Searching internet, it seems alot people have problems with GT28RS regarding overboost. |
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« Last Edit: May 31, 2020, 07:44:20 AM by K92 »
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fknbrkn
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mk4 1.8T AUM
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« Reply #136 on: May 31, 2020, 09:59:57 AM »
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I've never got any problems with original garett
There is a 5bolt flange and if youre used custom dp with a flat surface in front of wastegate it could ends up with the wg valve hitting the dp and not fully opens
Also those wg spring rated 12-14psi and boost curve follows it before 5k
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« Last Edit: May 31, 2020, 10:02:43 AM by fukenbroken »
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K92
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« Reply #137 on: May 31, 2020, 10:23:55 AM »
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I've never got any problems with original garett
There is a 5bolt flange and if youre used custom dp with a flat surface in front of wastegate it could ends up with the wg valve hitting the dp and not fully opens
Also those wg spring rated 12-14psi and boost curve follows it before 5k
Its custom DP, tested, and WG flap is moving freely to the max when actuator is removed. Made runs with 0 to 20. Are these normal, or incresment is too small ? Will do rest runs tomorrow. |
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« Last Edit: May 31, 2020, 11:51:10 AM by K92 »
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K92
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« Reply #138 on: June 05, 2020, 12:19:00 PM »
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Anyway. Whatever problem is. Turbo is allover original. I made logs to the point where turbo started overboosting. From there i edited logs to 7000rpm
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K92
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« Reply #139 on: June 06, 2020, 09:03:10 AM »
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Anyway. Whatever problem is. Turbo is allover original. I made logs to the point where turbo started overboosting. From there i edited logs to 7000rpm
And this is first result with modified logs. |
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nyet
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« Reply #140 on: June 06, 2020, 12:10:28 PM »
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That actually looks pretty damn good
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K92
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« Reply #141 on: June 06, 2020, 12:34:07 PM »
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That actually looks pretty damn good
Thank You. That means alot. To get this feed forward system right, i guess it took atleast 10 tries + logs to make it like this . Have some work ahead to get it steady near 1450-1500mbar. Btw, is my understanding of map limit correct : If i go over map limit, ecu wont read boost above 2550mbar and as result pids wont control boost anymore. From my understanding, if something is mechanically broken / dont have boost gauge, it is possible to break something. BUT, if this is my car and with knowlage, i got over map limit and check it with boost gauge, have right springs, is it really that bad ? |
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K92
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« Reply #142 on: June 13, 2020, 01:52:18 AM »
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I got still some problems regarding WOT and hardcut. I had my limiter set to 7000rpm. Sometimes, not always when doing wot runs, there was fuel cut after that goes to 7000rpm and again fuel cut.
Brought rpms down to 6000rpm ( hardcut ), and still same issue. Logged also stationary, there was fuel cut at 5700 rpm and 6000 rpm. And so called hardcut bangs sometimes happen, mostly not.
My guess was fuel pump or filter. But my car should have from factory S4 b5 fuel pump( somebody may have changed it ). So far i have not found any issue in software which could make this problem.
Added afr log stationary. 4bar fpr 550cc injectors. Injector duty cycle on wot runs ~ 80 - 85% . Out of ideas.
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adam-
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« Reply #143 on: June 15, 2020, 12:31:06 AM »
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Did you adjust the axis?
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K92
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« Reply #144 on: June 15, 2020, 01:13:43 AM »
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Did you adjust the axis?
KFZWMN last value 6000 KFZWMS Last value 6720 and next to last 6000rpm -30 |
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K92
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« Reply #145 on: July 08, 2020, 09:53:11 AM »
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I have still problem which i have not been able to sort.
Problem : ALS and Hardcut stop working.
When als does not work, it makes only 0.5 bar and does not bang as much. When als is working, makes 1+ bar. When als does not work, also hardcut does not work ( no bangs ).
For exmaple I do wot, in 2nd gear, hardcut works, then i drive 2 minutes and next time hardcut does not work. I have tried different things in software but nothing have helped so far.
Seems that everything works, in the morning and as if car gets hotter, it stops. ( not 100% sure ).
My last tought was that maybe my software has something to do with it as i changed to 4b0906018DC.
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nyet
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« Reply #146 on: July 08, 2020, 10:01:13 AM »
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Problem : ALS and Hardcut stop working.
Did you write this yourself in ASM, or is it just in map changes? If you just added it by script, remove it. |
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K92
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« Reply #147 on: July 08, 2020, 10:09:47 AM »
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Hardcut was made by me only with map changes, and has been working on CH file also. ALS was added by tuner, who has tested this on many me7.5 cars. Right now I have little knowledge of ASM, as i am learning it now. I have suspected als, but i am not sure. My last resort would be to take fresh file and write everything without als to see if problem is still there. As i have read als that is in this forum, is bad, I asked tuner to help. My guess is he knows what he is doing if he tunes cars all day and night and als works on other cars. Did you write this yourself in ASM, or is it just in map changes?
If you just added it by script, remove it.
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« Last Edit: July 08, 2020, 10:13:36 AM by K92 »
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nyet
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« Reply #148 on: July 08, 2020, 10:17:52 AM »
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Hardcut was made by me only with map changes, and has been working on CH file also. ALS was added by tuner, who has tested this on many me7.5 cars. Right now I have little knowledge of ASM, as i am learning it now. I have suspected als, but i am not sure. My last resort would be to take fresh file and write everything without als to see if problem is still there.
As i have read als that is in this forum, is bad, I asked tuner to help. My guess is he knows what he is doing if he tunes cars all day and night and als works on other cars.
I'd remove it to rule it out as a source of the problem. |
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K92
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« Reply #149 on: July 08, 2020, 10:26:37 AM »
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I'd remove it to rule it out as a source of the problem.
Okey, thank you. Will try it. |
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