Mimicking the Map logic of pre-2020 ecus

Boosted6 · 12-30-2020, 02:55 PM

i love the burbles and pops and bangs of the pre 20's-21's ecus especially at below 3k rpms. since i would like to upgrade in the future to a 2022, and when finally the ECU gets cracked...its it possible to "copy" the overrun factory maps and have them encoded to the new ecu flash logic?

sux that BMW had to do this, as the factory mapping for the bubrble's were vicious on the pre 21's or 20's.

I like the factory map of the overruns, they have a nice sequence and doesn't sound artificial

bSwiazzy · 12-30-2020, 03:10 PM

i dont think you would be able to have access to BMWs factory maps? unless you got like an inside guy who would leak that to you but i highly doubt it

or idk if tuners can save maps or not im just guessing here

carguy19 · 12-31-2020, 07:50 AM

The aftermarket tuners are able to restore pops and burbles when you flash the car if you do a tune. I think most charge a small ($50) fee on top of the flash to install for you when writing everything into your DME.

Boosted6 · 12-31-2020, 09:17 PM

im wondering if its their own recipe (coding) or reactivating the dormant burble code. that'd be cool!

H433x0n · 01-01-2021, 08:24 PM

Speaking from first hand knowledge, the primary difference inside the DME is that the 2021 M340i targets lambda 1.0 under full load. The artificial “burble” is present in both but more pronounced in earlier models since it runs richer.

alyabiev · 01-03-2021, 07:20 PM

Quote:

Originally Posted by H433x0n

Speaking from first hand knowledge, the primary difference inside the DME is that the 2021 M340i targets lambda 1.0 under full load. The artificial “burble” is present in both but more pronounced in earlier models since it runs richer.

Didn't that happen at previous MY's when cat temp was still low to speed up the heating? I saw that logic in my M240i.

H433x0n · 01-04-2021, 09:20 PM

Quote:

Originally Posted by alyabiev

Didn't that happen at previous MY's when cat temp was still low to speed up the heating? I saw that logic in my M240i.

At cold start yes, this is post cold start. The maps referenced for full load lambda target are set 1.0 across the board. This wasn’t the case in the 2020’s.

Boosted6 · 02-05-2021, 08:38 PM

Lambda is the sensor ? if yes..the pre or post cat one ?

12-30-2020, 02:55 PM	#1
Boosted6 Private 39 Rep 57 Posts Drives: G80 Skyscraper Join Date: Dec 2020 Location: New Jersey iTrader: (0)	Mimicking the Map logic of pre-2020 ecus i love the burbles and pops and bangs of the pre 20's-21's ecus especially at below 3k rpms. since i would like to upgrade in the future to a 2022, and when finally the ECU gets cracked...its it possible to "copy" the overrun factory maps and have them encoded to the new ecu flash logic? sux that BMW had to do this, as the factory mapping for the bubrble's were vicious on the pre 21's or 20's. I like the factory map of the overruns, they have a nice sequence and doesn't sound artificial
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12-30-2020, 03:10 PM	#2
bSwiazzy Second Lieutenant 201 Rep 279 Posts Drives: 2021 X3M Join Date: Aug 2020 Location: Southern California iTrader: (0)	i dont think you would be able to have access to BMWs factory maps? unless you got like an inside guy who would leak that to you but i highly doubt it or idk if tuners can save maps or not im just guessing here __________________ 2015 Honda Civic Si // FBO + Hondata // Retired 2017 340i // FBO + BM3 // Retired 2020 M340i // Stage 2 // Retired 2021 X3M // RGSport Midpipe + MSS + RaceChipGTS // Retired 2016 Rav4
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12-31-2020, 07:50 AM	#3
carguy19 Lieutenant 107 Rep 498 Posts Drives: 2021 M340 Join Date: Mar 2008 Location: NJ iTrader: (0)	The aftermarket tuners are able to restore pops and burbles when you flash the car if you do a tune. I think most charge a small ($50) fee on top of the flash to install for you when writing everything into your DME.
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12-31-2020, 09:17 PM	#4
Boosted6 Private 39 Rep 57 Posts Drives: G80 Skyscraper Join Date: Dec 2020 Location: New Jersey iTrader: (0)	im wondering if its their own recipe (coding) or reactivating the dormant burble code. that'd be cool!
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01-01-2021, 08:24 PM	#5
H433x0n Enlisted Member 36 Rep 46 Posts Drives: 2021 BMW M340i Join Date: Aug 2020 Location: Auburn, AL iTrader: (0)	Speaking from first hand knowledge, the primary difference inside the DME is that the 2021 M340i targets lambda 1.0 under full load. The artificial “burble” is present in both but more pronounced in earlier models since it runs richer.
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02-05-2021, 08:38 PM	#8
Boosted6 Private 39 Rep 57 Posts Drives: G80 Skyscraper Join Date: Dec 2020 Location: New Jersey iTrader: (0)	Lambda is the sensor ? if yes..the pre or post cat one ?
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