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Author Topic: IMX for GT2871r  (Read 15926 times)
vvt18
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« Reply #30 on: April 13, 2020, 09:20:04 AM »

WTF!
I told you what i do! Nobody help me with any concret argument.
I read and read and read and i understood in my way. If i wrong i don;t know. You told me i'm wrong
What i'm rong because i follow stag1 explanation from wiki
First increased ldrxn , iop and irl.
If the boost not follow the request who arrived from ldr can have torque intervention or hbd. They was disabled.
So the boost(in 3rd gear with pedal on the floor from 1500rpm , must a boost very very late ). So what i'm wrong if i put a question here like a noob for my prbolem
Somebody tell hardware problem ( i don;t tink so - maybe this is a turbo problem because works to late) other tell software problem.....You make me very confused.
Every post about boost in your site is wrote if want to increase boost make from ldr and after work with imx and drl.
Wrong again....? Today made other log with a lower ldrxn before 4000rpm, lower timing and leaner AFR., without any hardware modification.
IS very bad,  retards appears and the same low spool.
So all advices about afr and timing was bad.

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nyet
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« Reply #31 on: April 13, 2020, 09:40:50 AM »

If the boost not follow the request who arrived from ldr can have torque intervention or hbd. They was disabled.
No the ldr PID is entirely unreleated to torque intervention. Also, do not disable HBN. Just set it correctly for your turbo based on its compressor map, and forget it.
Quote
So the boost(in 3rd gear with pedal on the floor from 1500rpm , must a boost very very late ). So what i'm wrong if i put a question here like a noob for my prbolem
I can't figure out what that means

Quote
Somebody tell hardware problem ( i don;t tink so - maybe this is a turbo problem because works to late) other tell software problem.....You make me very confused.
The very slow spool could be a lot of things, but you aren't at the point were we can say anything about that yet.

Quote
Every post about boost in your site is wrote if want to increase boost make from ldr and after work with imx and drl.
Wrong again....? Today made other log with a lower ldrxn before 4000rpm, lower timing and leaner AFR., without any hardware modification.
You need req boost high enough so that it results in 95% WGDC all throughout spool, until just actual boost is about to meet req, at which point WGDC should drop to just below the correct steady state DC. At no point, however, should requested pressure be within 2-300 mbar of 2550 unless you have the 5120 hack and a 3bar pressure sensor. If you want >1.4 bar tough luck. Period. Your sensor limit is exactly that; 1.4. Do not go past 1.3 or 1.4. End of story.

Please go no further until you understand exactly what I just said *and why*. Do not touch any other maps, period.

Quote
IS very bad,  retards appears and the same low spool.

One thing at at time. Stop trying to fix multiple things at once

1) get your req boost correct (it isn't even close at the moment)
2) make sure wgdc is 95% during spool
3) make sure IMX and DRL are set high enough to prevent DC from being capped and underboosting, and low enough to prevent excessive overshoot

Don't worry about ignition or fuel yet.
« Last Edit: April 13, 2020, 09:46:39 AM by nyet » Logged

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« Reply #32 on: April 13, 2020, 09:44:31 AM »

The goal is to keep actuator valve closed (ldtvm 95+%) until actual boost mets req to spool turbo faster
And you almost did it in prev log. Now its totally ruined idk why

Now here is a basics
If you see
- n75 closed
- afr in a reasonable range
- ignition in a reasonable range
- wdkba 100%

then its a hardware problem. its an essential understanding how the engine works. how do you think any intervention affects? by the magic?
the only thing (and im pointed you previously) is the cam advance (nws) active too long.
also its a weird log size of a 4 sec run. again.




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vvt18
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« Reply #33 on: April 13, 2020, 09:47:32 AM »

THANKS again for your answers.
I'll made modification with what you told me and i'll come back with new log.

Nyet I had wdc 95% and that's why I'm very confused, because the spool is very slow. Maybe i make the log wrong. I drive with car in 3rd gear at 1500rpm and there i push the acceleration pedal to 100% after i saw my boost is too high (you are right my boost exeed 1.5 bar and there retards appear and afr /lambda is too lean like requested).

FukenBroken , i decreased ldrxn before 4000rpm , decreased imx after 3500rpm at last line and  decreased kfzw in the spool area compared to yesterday file.
I made lamfa leaner at 90% and 99% than yesterday.
With these the DC is very bad , and retards apears.
wdkba  is strange in my log? the pedal is 100 but throtle angle is from88 to 100.
"the only thing (and im pointed you previously) is the cam advance (nws) active too long"
I modified wse on 1700 and 2000 rpm with 18 values as against -4 because to eliminate the vvt actuator error at low rpm. So you told me to put -4 value sooner to change cam?

« Last Edit: April 13, 2020, 11:02:46 AM by alin1 » Logged
nyet
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« Reply #34 on: April 13, 2020, 11:17:27 AM »

Nyet I had wdc 95% and that's why I'm very confused, because the spool is very slow.

You're the one who chose a gigantic turbo for a tiny 1.8t.

Next time pick a smaller turbo or use a proper motor, like a 2.7t
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vvt18
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« Reply #35 on: April 13, 2020, 11:23:55 AM »

So this is the true answer , my turbo is big for that engine. I had and saw many people who had this turbo in my country on the same engine , other had gt35....I.ll reduce the boost at 1.3-1.4 bars like you said to me and will see the results.
Thanks again.
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nyet
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« Reply #36 on: April 13, 2020, 11:51:18 AM »

Possibly. Once you get everything else where it needs to be we can see what we can do about

1) deciding if your spool is expected
2) if it isnt right, trying to fix it
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vvt18
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« Reply #37 on: April 14, 2020, 02:52:54 AM »

Today is better after my opinion.
I increased my imx before 3000 all values at 95% and decreasesed for overboost after 4000. I must put 10 and 20 values in IMX at the last 2 lines. I think my wastegate is to strong now.
I find next probems who must optimize them:
1. Can i leave imx like this (attached picture) or try to modify drl with smaller values?
2. Will try to put 95% ayt 3500 rpm too but i think it is enought boost at 4000 rpm aproximatly 1bar at 3750 rpm for an engine without forged rods.
3. I put my maximum load in ldr =200 but the boost desired is 2550.I'll try to decrease IRL. Correct, because there is 210 maximum value on the last line?
4. Very strange because i made 2 logs at a few minutes one after other, same file without any modifications. In log1 i have retards in log 2 doesn't. And more strage because in log 1 where i have retards , the EGT is less than log 2.
5. i saw my afr not follow the requested after 5200rpm. Injectors are in parameters 90% , have not missfire. My tabgts is setted to 700degree so it's higher than my calculated egt and what i understood from what i read AFR must follow the definition of LAMFA table , and my lamfa values in my table are exaclty like requested. I don't understood how made leaner my AFR after 5200. My Maf is scalled of and kflf is setted to 1.

I hope i put some plausible question and i don;t need to somebody resolve my problems like someone wrote in a post. I need only advices because for me as a noob are some "strange" things.
Thanks again for all.
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vvt18
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« Reply #38 on: April 16, 2020, 09:17:10 AM »

Hi
Much better again, but something strange.Maybe the clutch is skating or the car jumps off the road.
Can see in the log file.
First at 3919 rpm can see the rpm is lower than upstairs but the pedal is 100%.
If you have any advices please let me know
Thanks to all
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nyet
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« Reply #39 on: April 16, 2020, 09:35:06 AM »

Boost looks MUCH better good job. You're on the right track there.

Fueling is definitely not great; might be fuel pump.

You're not out of injector so thats good, but the crazy lambda control is definitely a red flag.

As far as rpm goes, thats why i have a ton of filtering on the RPM input, consistency is all over the map. May want to check your rpm pickup/wiring at some point.
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vvt18
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« Reply #40 on: April 16, 2020, 11:31:39 AM »

Thanks you for appreciation NYET.
I have bosch 550 injectors
I scaled them ok i think
tvub and krkte.
I have ltft -2.5 from 400km so i think they are scaled ok.
Sincerly  tried the fueling tuning lamfa>kflbts>kr (i attach my tables and i think i don't make mistake in one of them). Nobody give our like i attached but i think if some noobs will need them....I hope they are seted ok.
I saw what you said about fuel.
Only in boost and especialy when i push the pedal 99%. It is like you said : can be the fuel pump. It is the original one from when i bought my car, and the car was new when i bought it (in 2010 and now have 135.000km).
Thanks again and any advice will be helpfully for me.

PS i fogot to saiy ; lambda 1 wideband is new and has 200km , second lambda is deleted like cat too. I started from a BAM file with egt deleted too. The MAF is from BAM engine and i used the scaled from it!
And from 2 days when i make these logs, my cluch seems is dead. The flywheel make sounds. Can be this a cause of the decreese rpm from time to time and  the fuel can not follow what i request?
« Last Edit: April 16, 2020, 12:53:43 PM by alin1 » Logged
aef
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« Reply #41 on: April 16, 2020, 11:12:13 PM »

You are at 90% injector duty and bosch 550/630 will not provide more after this so your are basically maxed here.
I would reduce boost for 0.1 or 0.2bar just to try if this will be any better.
next step is a dw65v/fake fuelpump but nothing too big because the stock 3bar fuel pressure regulator is a bottleneck for to big fuel pump.

what about fkkvs, all 1s at the moment? sparks like brand new?

regards
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vvt18
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« Reply #42 on: April 16, 2020, 11:25:04 PM »

Hi AEF
Sparks have 9000km and they are NGK PFR7Q , and i think they are ok.
I have an OSIAS fuel pump but not mounted yet.
I have an ajustable fuel regulator but not mounted yet.
FKKVS is not 1 i attached here.

Regards to all!
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vvt18
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« Reply #43 on: April 18, 2020, 07:42:26 AM »

Can be TVUB and KRKTE calibarted wrong for my injectors?
My idel is ok ,  the car start very well doesn't matter the outside temperature , and in the full boost don had essitations or goals.

KRKTE:  0.06067

TVUB:  
7.96          10             11.07        14.01         15.98
1.5760   1.1040   0.9413   0.8373   0.7600


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nyet
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« Reply #44 on: April 18, 2020, 08:58:39 AM »

Post LTFTs

Lambda control shows a bit lean.
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