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Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 03-11-2019, 10:05 PM   #121
armenh7
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Originally Posted by Harry_de_best View Post
Hey guys, first time posting here but have messed ALOT with the exhaust pop/burble settings.

I'm 99% sure that you aren't getting pops above 3000-4000RPMs because you are not running MS430056. I did all my tuning and modifications on MS430066 and for the life of me could not get it to pop above 3000-4000RPM. I changed at least 10 more tables relating to maximum and minimum ignition angles etc with no effect what so ever.

After flashing to MS430056, and using the timered settings I got pops straight away from any RPM. On MS430066 the timer settings did not work at all.

The only question I have now is the hysteresis tables, not sure why you want the pops to pop at such a slow interval. After studying modern BMWs, they seem to start with a higher hysteresis then drop to a lower hysteresis.

I'm running catless headers with two scorpion mid resonators and a remus rear muffler. I have to retard ignition around -18 to -20 deg to get decently loud pops. I have not messed with any fueling as I don't think its necessary since the pops are loud enough.

Around -9 to -10 degrees I get the modern burble sound, where the pops aren't crackling but are actual burbles.

There are also many other subtle changes between 56 and 66 e.g the time it takes for cruise control to activate (56 is instant on when you press the button on the steering wheel, 66 you have to hold the button down for a few seconds). Overall 56 is much more reactive to changes in the map, e.g I was trying to reduce rev-hang on 66 - the changes I did seem to reduce it but when I loaded the same numbers on the 56 map, the rev-hang was reduced so heavily it was like a race car, the car would shake after letting of the throttle - I could feel the diff bushing wobbling lol.

I guess if you want your car to spit fire, you will have to add fuel and retard ignition timing heavily while having the correct hysteresis. You'd want big hysteresis numbers at high RPMs to keep the flame going.

[EDIT] Forgot to mention, the ip_t_puc_deacc tables work super well based on gear, so for myself in gears 4-5 I have the burble much shorter than in gears 1-2-3. Makes daily driving much less painful as I have no cats. This method completely negates the need to disable fuel cut (ip_n_min_puc rpm > Redline rpm) since if you are coasting it will burble non stop and get really annoying.
I discovered how to get pops above 4k rpm. I use version 66. You edit the linked y-axis table to your desired rpms.

One issue I discovered from doing that however is that no matter how much or little I retard my timing, the pops sound like pops vs a burble. I prefer a burble

With timered pops, I can't get anything in park/neutral.

Last edited by armenh7; 03-11-2019 at 10:06 PM.
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Old 03-11-2019, 10:13 PM   #122
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Originally Posted by armenh7 View Post
I discovered how to get pops above 4k rpm. I use version 66. You edit the linked y-axis table to your desired rpms.

One issue I discovered from doing that however is that no matter how much or little I retard my timing, the pops sound like pops vs a burble. I prefer a burble

With timered pops, I can't get anything in park/neutral.
I tried editing Y-axis on ver 66 however that did not change anything for me. I tried editing much much more and could not get anything consistent.

To get pops in neutral you need to edit the table at 0xBD4C. The MS430056_64K.xdf doesn't have this defined, you have to use the XDF with the launch and no lift shift, it has 0xBD4C defined. The table is called ip_t_puc_deacc__n__maf_mmv.

Standard that table is all 0.

If you want burble, change your hysteresis to lower numbers while running a less ignition retard. Don't need any changes to fueling, maybe a tiny amount if you have cats.
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Old 03-11-2019, 10:15 PM   #123
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Originally Posted by Harry_de_best View Post
I tried editing Y-axis on ver 66 however that did not change anything for me. I tried editing much much more and could not get anything consistent.

To get pops in neutral you need to edit the table at 0xBD4C. The MS430056_64K.xdf doesn't have this defined, you have to use the XDF with the launch and no lift shift, it has 0xBD4C defined. The table is called ip_t_puc_deacc__n__maf_mmv.

Standard that table is all 0.

If you want burble, change your hysteresis to lower numbers while running a less ignition retard. Don't need any changes to fueling, maybe a tiny amount if you have cats.
That's the table I edited in version 66 but still nothing in neutral. I haven't tried with 56 yet.

Here it is popping in first gear (auto). I couldn't get past 6k because it would automatically shift to second https://drive.google.com/file/d/1UZh...w?usp=drivesdk

Last edited by armenh7; 03-11-2019 at 10:17 PM.
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Old 03-11-2019, 10:17 PM   #124
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That's the table I edited in version 66 but still nothing in neutral. I haven't tried with 56 yet.
None of the timer stuff worked for me with 66. Don't know why.
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Old 03-11-2019, 10:17 PM   #125
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See my post. I edited it
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Old 03-11-2019, 10:18 PM   #126
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None of the timer stuff worked for me with 66. Don't know why.
In the video I just posted, that's with timer st 2 seconds. It works for me. The timer doesn't work if you set overrun cutoff to 7008rpm rather than the factory 1200rpm
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Old 03-11-2019, 10:19 PM   #127
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In the video I just posted, that's with timer st 2 seconds. It works for me. The timer doesn't work if you set overrun cutoff to 7008rpm rather than the factory 1200rpm
Yeah I set all my overrun stuff to factory and it didn't quite work regardless the combinations.

My car is manual, maybe that's why?
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Old 03-11-2019, 10:20 PM   #128
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Yeah I set all my overrun stuff to factory and it didn't quite work regardless the combinations.

My car is manual, maybe that's why?
Shouldn't be. Gear detection is done by speed vs rpm I believe
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Old 03-11-2019, 10:22 PM   #129
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Shouldn't be. Gear detection is done by speed vs rpm I believe
I was thinking more along the lines of the auto gearbox ECU doing some funky stuff to the maps - in the bins there are always some maps for both AT and MT....

Last edited by Harry_de_best; 03-11-2019 at 10:23 PM.
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Old 03-11-2019, 10:24 PM   #130
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Here are my values
https://drive.google.com/file/d/1MMs...w?usp=drivesdk

If you set the very first map to 7008 at 90C, it will pop endlessly and will ignore your timer maps
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Last edited by armenh7; 03-11-2019 at 10:25 PM.
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Old 03-11-2019, 10:26 PM   #131
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Mine are quite similar in 56 however I have much lower hysteresis, a range of 96, 128 and 160.

Lower gears with lower hysteresis, higher gears with higher hysteresis.
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Old 03-11-2019, 10:37 PM   #132
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Mine are quite similar in 56 however I have much lower hysteresis, a range of 96, 128 and 160.

Lower gears with lower hysteresis, higher gears with higher hysteresis.
Is it a 330?
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Old 03-11-2019, 10:45 PM   #133
Harry_de_best
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Quote:
Originally Posted by Harry_de_best View Post
Mine are quite similar in 56 however I have much lower hysteresis, a range of 96, 128 and 160.

Lower gears with lower hysteresis, higher gears with higher hysteresis.
Is it a 330?
Yes
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Old 03-12-2019, 02:51 AM   #134
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Try setting id_n_hys_min_puc__vs__gear to 7008rpm in the upper line to deactivate it completly or set c_t_puc_deacc_vs to the amount of delay in seconds you want.
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Old 03-12-2019, 03:41 AM   #135
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I found running a little leaner really helped the flames come out from the exhaust.
(Completely straight through)



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Old 03-12-2019, 09:23 AM   #136
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Leaning mixture only helped in short term , as I think it makes exhaust pipes hotter quicker because of higher egts, But after i was able to heat me exhaust through hard driving , with extra fuel I had flamebowls like a flamethrower. I wish my car was still NA.
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Old 03-12-2019, 11:35 AM   #137
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Originally Posted by Harry_de_best View Post
To get pops in neutral you need to edit the table at 0xBD4C. The MS430056_64K.xdf doesn't have this defined, you have to use the XDF with the launch and no lift shift, it has 0xBD4C defined. The table is called ip_t_puc_deacc__n__maf_mmv.

Standard that table is all 0.
The reason ip_t_puc_deacc__n__maf_mmv is set to all zero is because it's never used in the ecu code on any software version. That is also the reason why it doesn't exist in the new xdf files

When the car is standing still it will use c_t_puc_deacc_vs instead of the ip_t_puc_deacc tables.
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Old 03-13-2019, 01:18 AM   #138
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The reason ip_t_puc_deacc__n__maf_mmv is set to all zero is because it's never used in the ecu code on any software version. That is also the reason why it doesn't exist in the new xdf files

When the car is standing still it will use c_t_puc_deacc_vs instead of the ip_t_puc_deacc tables.
I noticed that the new xdfs no longer had that. What value should I set it to though? One time I set the value too high and my engine flooded with fuel
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Old 03-13-2019, 02:24 PM   #139
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Is there a way to get pops below 3000rpm? I only get 1-2 stronger bangs when I rev to max and after that small pops, how can I get bangs all the way to 1000-2000rpm?
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Old 03-13-2019, 02:42 PM   #140
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Is there a way to get pops below 3000rpm? I only get 1-2 stronger bangs when I rev to max and after that small pops, how can I get bangs all the way to 1000-2000rpm?
Modify the lower tables in the map
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