Deceleration

e36Vert · **Joined:** Tue Jul 28, 2020 2:27 am **Posts:** 6

Lienke wrote:

e36Vert wrote:

Hi everyone,

this is my first post but I am a interested reader for months.
I learned a lot through other posts, but I wasn't able to find how to put pops and bangs on the AC. I've read all posts which exists to pops and bangs.

I don't want a done file, just an advise which tables I have to work on to put the pops on the AC.

In my latest tries, I've changed Fuel Restore RPM (AC) and Ignition Retard, but there were no Pops when the AC is on.
If I tried the same in the normal Fuel Restore RPM map, I got Pops.
Where is my mistake?

Would be great if someone could help me.

If you have a working ac in your car, modify all the tables as you would modify for regular pops, except for Fuel Restore - RPM and Ignition Retard - Decreasing TPS (Closed) you need to modify Fuel Restore - RPM (AC on) and Ignition Retard - Decreasing TPS (Closed) (AC on)

If your AC isn't working in the car, pops won't work. However you can trick ECU into thinking it is working, by grounding pin 16 from the ecu.
Read this post for more info: https://www.romraider.com/forum/viewtop ... 58&t=17422

I've tried it like you said, but it wasn't working. I have no AC on my own car, I've tried it on cars of friends.
I've tried both versions, but none of them was working.
Both owners said that their AC's are working

If there is no other way to put pop and bangs on AC, there has to be something wrong with the AC.

Can you give me an explanation how to simulate the AC?
Where should I get the signal of pin 16? Should I ground it with body? I'm not very good with electric stuff..

Thank you for your help.

tdehrmann1 · **Posted:** Fri Oct 16, 2020 3:54 am

e36Vert wrote:

Lienke wrote:

e36Vert wrote:

Hi everyone,

this is my first post but I am a interested reader for months.
I learned a lot through other posts, but I wasn't able to find how to put pops and bangs on the AC. I've read all posts which exists to pops and bangs.

I don't want a done file, just an advise which tables I have to work on to put the pops on the AC.

In my latest tries, I've changed Fuel Restore RPM (AC) and Ignition Retard, but there were no Pops when the AC is on.
If I tried the same in the normal Fuel Restore RPM map, I got Pops.
Where is my mistake?

Would be great if someone could help me.

If you have a working ac in your car, modify all the tables as you would modify for regular pops, except for Fuel Restore - RPM and Ignition Retard - Decreasing TPS (Closed) you need to modify Fuel Restore - RPM (AC on) and Ignition Retard - Decreasing TPS (Closed) (AC on)

If your AC isn't working in the car, pops won't work. However you can trick ECU into thinking it is working, by grounding pin 16 from the ecu.
Read this post for more info: viewtopic.php?f=58&t=17422

I've tried it like you said, but it wasn't working. I have no AC on my own car, I've tried it on cars of friends.
I've tried both versions, but none of them was working.
Both owners said that their AC's are working

If there is no other way to put pop and bangs on AC, there has to be something wrong with the AC.

Can you give me an explanation how to simulate the AC?
Where should I get the signal of pin 16? Should I ground it with body? I'm not very good with electric stuff..

Thank you for your help.

Pin 16 of MS41 to Ground -> AC on Signal (works only with E36 Flash for MS41)

You can check with INPA if its working or not.

Otherwise you can bridge the AC Pressure Switch but be careful!!! If AC has to less pressure there is no automatical turn off. It will be damaged.

Fabio · **Posted:** Fri Oct 16, 2020 5:13 am

tdehrmann1 wrote:

Pin 16 of MS41 to Ground -> AC on Signal (works only with E36 Flash for MS41)

You can check with INPA if its working or not.

Otherwise you can bridge the AC Pressure Switch but be careful!!! If AC has to less pressure there is no automatical turn off. It will be damaged.

What do You mean by Flash from e36 ms41 ? I am thinking of doing that in MS41.2 Without AC.

tjwasiak · **Posted:** Sat Oct 17, 2020 5:34 pm

You need to use E36 based software (so MS41.2 should work) as E39 based software handles A/C differently (and this is why using wrong flash gives issues with A/C).

Mrkaboum · **Joined:** Wed May 01, 2019 1:01 pm **Posts:** 10

maxMinimal wrote:

Mrkaboum wrote:

hello all,

I am with a 320i ( euro ) , after several tests I've very big pop when decelerating, but only under 3500rpm-3800, I read the whole thread and try what is written but I must be missing a value to modify, do you have the information ?
( i try with "fast decreasing TPS - min rpm" at 6000rpm , or 0rpm the same result)

Thanks ! from France

https://www.casimages.com/i/200929082305719263.png.html

Hi, used your settings and added some fuel to the base map. Here is a video of the result. But I would like even more fire, I do not know in what settings you can add fuel. Sorry for my English, I use Google Translate.

https://youtu.be/fKla8AnU5zU

Nice result !! but why on my car, the pop start after 4000rpm ? and not on your car xD :shock:

Akos04 · **Posted:** Sun Nov 08, 2020 8:25 am

Hi, i am here because i want to get rid of the rev hang of my 320i. It revs up fairly quick, it has an m20b20 SMF, but the rev hang is there. I cant shift fast at like 3-4k rpm because the revs are still high when is want to depress the clutch.
I found a video. Now its my goal to reach that speed of the revs dropping. https://www.youtube.com/watch?v=68MfC_P ... ex=3&t=30s
Is that possible that i just need to diasble Fast negative throttle detection? Or what else do i need to modify?
The other question i wanted to ask is can i simply swap my old "not indexed" ecu to another "indexed" one? Of course to an ews deleted one. Or is it possible to swap to for example an ecu from a 23 or 28i, and change the maps in it to a stock 20i? Are there any changes in harnesses between m52b20 b25 or b28?

TheHaaku · **Posted:** Sun Nov 08, 2020 3:23 pm

Nedim wrote:

TheHaaku wrote:

guys, thanks for that
https://www.youtube.com/watch?v=aP-SzycNP2Y

Wow. What did you change for so much fire? Very cool.

I added fuel in low load, high rpm on base map

tjwasiak · **Posted:** Sun Nov 08, 2020 3:49 pm

Akos04 wrote:

(...) The other question i wanted to ask is can i simply swap my old "not indexed" ecu to another "indexed" one? Of course to an ews deleted one. Or is it possible to swap to for example an ecu from a 23 or 28i, and change the maps in it to a stock 20i? Are there any changes in harnesses between m52b20 b25 or b28?

Yes you can use any ECU and flash it with proper file for your chassis and engine. The only changes in wiring not related to throttle flap are between different market cars and are related to emission norms. If your car has working EWS system you do not need to delete it from ECU - you can always adapt new ECU to EWS.

jannis335i · **Joined:** Tue May 29, 2018 3:42 am **Posts:** 2

I have a result that I cannot explain.

In my car 323ti I have programmed the deceleratiom which works very well. If I flash exactly the same software on another 323ti it will not bang. Although everything is the same.

Do you have an idea ?

maxMinimal · **Joined:** Wed Sep 02, 2020 5:52 pm **Posts:** 4

TheHaaku wrote:

Nedim wrote:

TheHaaku wrote:

guys, thanks for that
https://www.youtube.com/watch?v=aP-SzycNP2Y

Wow. What did you change for so much fire? Very cool.

I added fuel in low load, high rpm on base map

What values did you add and How much fuel did you add, because I added in the field the load 30 60 and 90 at 6000 and 6500 rpm +3 mg / stroke

https://youtu.be/ZTD5GZV7uKg

Akos04 · **Posted:** Sun Dec 06, 2020 12:03 pm

Hi, couple of days ago i wrote a question about the rev hang issue.
Finally i'm satisfied with the results of the tune. I post what changes i've made, maybe somebody needs some help with it too. I've not seen much information about this problem, which was very irritating for me. Now i can shift faster at low rpms, and revving sounds much better in my opinion.
I'm sure its not the best, but ok for me. I'm newbie here. If you see some problems, please tell me.
Here is how it sounds with m20b20 single mass flywheel.
https://youtu.be/4aMiEUjm-1c
Thanks for all the help

TheHaaku · **Posted:** Thu Dec 10, 2020 2:26 pm

maxMinimal wrote:

What values did you add and How much fuel did you add, because I added in the field the load 30 60 and 90 at 6000 and 6500 rpm +3 mg / stroke

https://youtu.be/ZTD5GZV7uKg

I added 1.5 values to 110 load and at rpm 3500 up, except that the higher the RPM, the more columns are changed, ofc in base fuel map

CretuRares · **Joined:** Tue Dec 15, 2020 3:45 pm **Posts:** 6

I would like to give a massive thank you for all the ones here that contributed with trials and errors , because of you i managed to get some absolutley impresive resaults with an E36 320i . Pops and bangs with nice flames and that bang that hits your chest . Here is the result
https://youtu.be/I-1QVVJeA_M

ZekWee · **Posted:** Mon Dec 21, 2020 2:37 pm

CretuRares wrote:

I would like to give a massive thank you for all the ones here that contributed with trials and errors , because of you i managed to get some absolutley impresive resaults with an E36 320i . Pops and bangs with nice flames and that bang that hits your chest . Here is the result
https://youtu.be/I-1QVVJeA_M

Unfortunately i never managed to get high RPM "pop", only below 3500rpm and the flames are totally random, maybe i'm wrong, sorry for my english i am attaching a video and my file.
https://youtu.be/xUVu-EoXL6c
I really like your result if you could add your file that I can compare it will help me a lot thank you

CretuRares · **Joined:** Tue Dec 15, 2020 3:45 pm **Posts:** 6

ZekWee wrote:

CretuRares wrote:

I would like to give a massive thank you for all the ones here that contributed with trials and errors , because of you i managed to get some absolutley impresive resaults with an E36 320i . Pops and bangs with nice flames and that bang that hits your chest . Here is the result
https://youtu.be/I-1QVVJeA_M

Unfortunately i never managed to get high RPM "pop", only below 3500rpm and the flames are totally random, maybe i'm wrong, sorry for my english i am attaching a video and my file.
https://youtu.be/xUVu-EoXL6c
I really like your result if you could add your file that I can compare it will help me a lot thank you

Yeah sure , of course , because all other shared their work , i will do allso , ill post tomorrow the mod file

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