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BMW M5 F90 (2018+) General Forums Engine, Exhaust, Drivetrain, Tuning Modifications    ECU tune

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      02-16-2019, 03:37 AM   #1
js.chang
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ECU tune

hello bro.
let's take a look at ECU tune as below;

Dyno condition: run 5th gear position
AWD mode
sport plus & DSC off

First dyno chart (Jan. 2019)
: full D/P (1st and 2nd cat' removed) & Akra Evo.
BPM stage II

Second dyno chart(Fab. 2019)
: 1st cat. removed, OEM 2nd cat. & Akra Evo.
Gene ECU tune

For the perfect procedure,
1) they put the OEM ECU data on existing ECU. (Green line)
2) they put the BPM stage II data. (Red line)
3) Finally they put the tuned data. (Blue line)

BPM stage II was over rich during WOT condition. (see the first dyno chart)

as result;
694.87 PS (not engine power)
99.59 kg-m (not engine torque)
A/F ratio is not under 11 during WOT (i will show the another chart soon)
0-60 : 2.85sec (stock 3.4sec) (using m performance analyzer, OBD logging))
I will try to 1/4 mile next week.
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Last edited by js.chang; 02-16-2019 at 04:16 AM..
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      02-16-2019, 07:53 AM   #2
Miko M
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Looks really good
What was the reason adding 2nd cat back on?
Can you add more info about tune?
License plate
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Life is too short...enjoy your life
///M
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      02-16-2019, 12:21 PM   #3
js.chang
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Quote:
Originally Posted by Miko M View Post
Looks really good
What was the reason adding 2nd cat back on?
Can you add more info about tune?
License plate
Just for sound and smell.
I experienced 3 kind of condition as below;
1) full d/p
2) 1st d/p + 2nd cat.
3) 1st cat. + 2nd d/p

in my opinion
1) Disgusting smell and exhaust sound is dirty(too much loud)
2) smillar with oem smell and sound is refined
3) same as oem smell and sound is just little more harder than stock.

I thing 1st catalyst has a significant impact on performance.
and 2nd catalyst provides a high purification function what i expected.
so this combination is suitable for me.

visit my insta

Last edited by js.chang; 02-16-2019 at 12:36 PM..
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      02-16-2019, 11:00 PM   #4
Rennology
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Do you have any videos? I'm curious to hear the Akra with DPs.

I'm running catless and can't decide if I should go with Akra or Eisenmann Performance.
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      02-17-2019, 08:11 AM   #5
soopa
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Mr. Chang! We need to meetup. I want to hear your exhaust system before I pull the trigger!!!
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      02-17-2019, 08:19 AM   #6
soopa
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Did you wrap your car? Looks different from Marina Bay or Snapper Rocks.
Almost Estoril Blue ish~
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      02-17-2019, 06:32 PM   #7
js.chang
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Quote:
Originally Posted by Beck. View Post
Do you have any videos? I'm curious to hear the Akra with DPs.

I'm running catless and can't decide if I should go with Akra or Eisenmann Performance.
https://youtu.be/qtZoXgPFqsA
Dyno clip

https://youtu.be/N06PkU_qVcM
Rev clip
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      02-17-2019, 06:45 PM   #8
js.chang
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Quote:
Originally Posted by soopa View Post
Did you wrap your car? Looks different from Marina Bay or Snapper Rocks.
Almost Estoril Blue ish~
Ha Ha Bro~
Yes. car wrapped 3M satin perfect blue.
see the sample pic.

Actually i want satin Mystique blue. but........out of stock..
Let's meet together sometime in Korea.
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