vvt18
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« on: October 27, 2019, 01:45:02 AM »
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Hi. I have a big question about my boost desired. Why it is aproxuimatly 1.5 if i put in ldrxn maximum 190%.
I attached my ldrxn , iop and irl and my log.
Something is very strage because my boost is very high but my engine load is very low and not follow ldrxn!
I read a lot on this forum, but i don't have any ideea for my problem.
I have a gt28 on my car.
Please some advice.
Many thanks.
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BlackT
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« Reply #1 on: October 27, 2019, 02:44:35 AM »
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If I understand you correctly, you have no clue how ME7 load work, read S4tuning wiki.
Your desired boost follow what you set
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« Last Edit: October 27, 2019, 02:48:54 AM by BlackT »
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vvt18
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« Reply #2 on: October 27, 2019, 02:51:38 AM »
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Is not what i set, I read the wiki , i think i understood how boost work but.....it is a very big difference between what i set and what the ecu do!
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BlackT
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« Reply #3 on: October 27, 2019, 02:58:13 AM »
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Is not what i set, I read the wiki , i think i understood how boost work but.....it is a very big difference between what i set and what the ecu do!
Can you explain me mathematically what is wrong here with your req boost? |
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vvt18
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« Reply #4 on: October 27, 2019, 03:04:25 AM »
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my boost must follow the ldrxn who is flat after 4000rpm - 190
the aproximation formula from load to boost is 190x10 +300 =2200mbar and i have 2450 to 2550 on my log
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vvt18
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« Reply #6 on: October 27, 2019, 03:18:02 AM »
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Correct.....it is what is wrote in wiki!
In this , why the actual load is very low and not follow the requested
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BlackT
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« Reply #7 on: October 27, 2019, 03:40:56 AM »
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Correct.....it is what is wrote in wiki!
In this , why the actual load is very low and not follow the requested
beacuse your turbo can't give so much power in low RPM |
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PATRICE79
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« Reply #8 on: October 27, 2019, 04:32:41 AM »
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Hello I have the same choice as you on my TT 225 I try to play on the boost linearization right now because I want to maintain my 191% of load I will inform you if I can solve the problem
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life is not a calm river
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vvt18
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« Reply #9 on: October 27, 2019, 09:22:48 AM »
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Who limit my actual LOAD? I think at that high boost i must have a high load!
Load is very low but my ldrxn is 190 and iop and irl are set higher than 190%
Thanks in advance!
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PATRICE79
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« Reply #10 on: October 27, 2019, 09:37:45 AM »
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We need to review the IRL and IOP modifies them in a different way
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life is not a calm river
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nyet
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« Reply #11 on: October 27, 2019, 07:19:04 PM »
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We need to review the IRL and IOP modifies them in a different way
No, you need to post a log. |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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nyet
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« Reply #12 on: October 27, 2019, 07:19:48 PM »
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Correct.....it is what is wrote in wiki!
In this , why the actual load is very low and not follow the requested
I don't know what to say |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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vvt18
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« Reply #13 on: October 31, 2019, 07:01:31 AM »
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Hi NYET!
Log was posted from the first point.
I decreased very much imx on the last rows after 3500rpm , put 50 value in the cells but the boost is higher than requested , i request 190 load and my boost is 1.6 bar
I'll try to decrease more the imx.Some things is strage because i have 95 values beetween 3500 rpm at all rows in IMX but my boost is under 0.2 bar and after is very high
If i understood well the 95 value in IMX it open n75 and the boost goes outside in inlet pipe not to wastegate and produce more boost , and is is lower value n75 is closed and redirect boost to wastegate and open it to reduce boost.This is correct?
Thanks again for your time.
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fknbrkn
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mk4 1.8T AUM
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« Reply #14 on: October 31, 2019, 07:06:31 AM »
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You should decrease ldrxn
And read wiki
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