NefMoto

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.

If I understand you correctly, you have no clue how ME7 load work, read S4tuning wiki.
Your desired boost follow what you set

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?

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

Keep in mind, this is a rough approximation. It can be off by as much as 30% or more. It is dependent on a large number of factors including air density, temperature, elevation, and the alignment of the stars and the moon. Use the above formula to get close, then adjust based on real world observations.    ::)

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

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

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!

We need to review the IRL and IOP modifies them in a different way

No, you need to post a log.

I don't know what to say

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.

You should decrease ldrxn
And read wiki

thanks Fukenbroken, but not understood why, my ldrxn is 180 after 3500 rpm and my boost arrived at 1.5-1.6 bar after 5000,
Is not strange? I think maybe my wastegate is too strong or my imx is to high.
I attached my setting.tommorow will make a new log
Many thanks again and waiting your advices.

Not much is going to help lag. Thats a big turbo on a tiny motor.

What's the question?
If it's too late see nyets post
If desired higher than you expect, lower ldrxn
If actual > desired check wg / pid

thanks, so what i understood , before 3000 rpm i can not do any thing because my turbo is too big
after 3500 rpm my actual boost is higher than desire , so i must decrease imx
please corect me
thanks again

No it is not... can you tell me, how you have concluded that?

Do you see the log file ???

witch one? Maybe I am missing something  ???

hi again
in first post i attached my log * 26.10.2019.csv (71.24 KB - downloaded 3 times.)

This one? You want to say, that in this log after 3500 RPM your Boost presure actual is higher than Boost presure desired

thanks again for your time
sorry my mistake
what to said before 3500-4000 my boost desire is high than actual , and high like the load too (ldrx) where i put 190% maxed value

Your turbo can't spool early
Lower request or change turbo to smaller one

Thanks FUKENBROKEN.
Ok , understod.
But please can you help me to understand why after 5000rpm my load is very low like desired?

I have no idea what you think load is.

I  have a t04e(which is bigger than a gt28) and 3rd gear WOT I have half a bar by 3000-3300 with a 3inch dp. Either way you need to hit up the s4wiki a bit more.

Hi alin,
You can also play with this map KFLDHBN to reduce the boost on my remap I set to 2.300 and I do not exceed 2300 M / bar because for now your turbo am LDRXN which is normal ;)