[alyabiev]

Originally Posted by ika1996

i do not have flex fuel sensor so i cannot be for sure about blend, but i mixed amount of ethanol to gasoline like 50/50,
my logs are identical to yours, no retardation of ignition timing or knock or boost lower, all same but my 100-200 was like 6.3 while 93 oct tune my time was lower 😆 like 6.0-6.2 seconds.
my main question is why boost pressure is so low like 23 psi on e50,

Do you happen to have any recent log links at hand? I’d be happy to review the data and look for possible issues😌

[Dawgz]

2022 M4 Comp XDrive | Femto unlocked | BM3 Stage 2 OTS FLEX tune 93 octane (at the time with out sensor), Intakes, downpipes, single midpipe, XHP trans flash Stage 3 (v1.5) with Drag mode and Line pressure bump enabled| Ambient temperature 35 degrees|

https://www.bootmod3.net/log?id=65d2...dbeb79e1300cbb


*Update* Now i know why boost was low on this. This was a Flex tune and I didnt have the Flex fuel sensor installed at the time so the ethanol content read 0. As such the DME was unable to scale it correctly.

[5soko]

Originally Posted by Dawgz

2022 M4 Comp XDrive | Femto unlocked | BM3 Stage 2 OTS 93 octane, Intakes, downpipes, single midpipe, XHP trans flash Stage 3 (v1.5) with Drag mode and Line pressure bump enabled| Ambient temperature 35 degrees|

https://www.bootmod3.net/log?id=65d2...dbeb79e1300cbb

Try another log in 4th gear from 2500RPM to redline WOT. Your log you posted above never goes WOT.

[Dawgz]

Originally Posted by 5soko

Try another log in 4th gear from 2500RPM to redline WOT. Your log you posted above never goes WOT.

Ya I noticed that after, I'm on a custom ethanol tune now.

[81bear]

Here’s a 3rd and a 4th gear pull.

2022 G80 xdrive
- BM3 stage 2 OTS custom rom
- 94oct
- ER HFC w/ MPE rear
- BMS drop-in filters
- CS trans

https://bootmod3.net/log?id=65e642ddc1bd12726f5aa8e8

https://bootmod3.net/log?id=65e64314c1bd12726f5aa8f0

[M4Martin]

2022 G82 Xdrive, down pipes, BMC filters, FEMTO unlock, BM3 flexfuel kit, BM3 OTS e50 stage 2 map.

This was a 1/4 mile pass. I ran a 10.8 on this one which was slower than my other passes on an OTS Stage 2 flexfuel tune running an e30 blend where I ran 10.5 (unfortunately I didn't log that pass).

I did flash this tune and go straight to the line so it may have needed more time for the dme to learn adaptations and allow full power. (Just what I've read online, please let me know if it's true that car needs to do a few drive cycles on a new flash before full power is available.

I noticed on this log that throttle closes alot, and the boost target trails off quiet a bit as the rpms get higher which seems weird to me, but I'm still learning a lot.

https://bootmod3.net/log?id=65fe65704b90142b266a3420

[hellcat2m4]

Originally Posted by M4Martin

2022 G82 Xdrive, down pipes, BMC filters, FEMTO unlock, BM3 flexfuel kit, BM3 OTS e50 stage 2 map.

This was a 1/4 mile pass. I ran a 10.8 on this one which was slower than my other passes on an OTS Stage 2 flexfuel tune running an e30 blend where I ran 10.5 (unfortunately I didn't log that pass).

I did flash this tune and go straight to the line so it may have needed more time for the dme to learn adaptations and allow full power. (Just what I've read online, please let me know if it's true that car needs to do a few drive cycles on a new flash before full power is available.

I noticed on this log that throttle closes alot, and the boost target trails off quiet a bit as the rpms get higher which seems weird to me, but I'm still learning a lot.

https://bootmod3.net/log?id=65fe65704b90142b266a3420

Looks good. Is this using launch control, and/or XHP drag mode?

[M4Martin]

Originally Posted by hellcat2m4

Looks good. Is this using launch control, and/or XHP drag mode?

Launch control. Stock transmission tuning.

[hellcat2m4]

Throttle closures are normal on OTS maps, thats part of the reason a custom tune feels much better. No need to worry

[M4Martin]

I tried something a little different today. I filled up drove for a few miles (2-5) to make sure the ethanol percentage reading in bootmod3 had stabilized at e50. Then I pulled into a parking lot and flashed the car to the Stock Custom Rom map. After the stock map finished flashing I flashed the e50 stage 2 map. (It's the same that I posted the log for above.) I did a short log as I pulled out of the parking lot. The log shows the boost target peaking at around 40 psig and the MAP reading about 36.9 psig which is about 15 psi more than when I was at the dragstrip.

It looks like to get the most out of the bootmod3 e50 ots map you have to flash it back to the stock custom rom map first. I can wait to get it back out at the track and see what it does now.

Here's a map I did of a pull from a standstill after driving about 45 miles on the map. Looks about the same as the short pull map mentioned above.

https://bootmod3.net/log?id=660dd24192122b3ec77a799f

2022 M4 Competition Xdrive
Downpipes
Drop in air filters
Flex fuel
Bootmod3 OTS e50 stage 2 map.

[alyabiev]

Originally Posted by M4Martin

I tried something a little different today. I filled up drove for a few miles (2-5) to make sure the ethanol percentage reading in bootmod3 had stabilized at e50. Then I pulled into a parking lot and flashed the car to the Stock Custom Rom map. After the stock map finished flashing I flashed the e50 stage 2 map. (It's the same that I posted the log for above.) I did a short log as I pulled out of the parking lot. The log shows the boost target peaking at around 40 psig and the MAP reading about 36.9 psig which is about 15 psi more than when I was at the dragstrip.

It looks like to get the most out of the bootmod3 e50 ots map you have to flash it back to the stock custom rom map first. I can wait to get it back out at the track and see what it does now.

Here's a map I did of a pull from a standstill after driving about 45 miles on the map. Looks about the same as the short pull map mentioned above.

https://bootmod3.net/log?id=660dd24192122b3ec77a799f

2022 M4 Competition Xdrive
Downpipes
Drop in air filters
Flex fuel
Bootmod3 OTS e50 stage 2 map.

Boost pressure measurement in the logs is absolute (ambient air pressure included), so the actual (relative) boost pressure is around 21-22psi only. Load targets seem to be quite low due to Load Limit Flag set to 2 (boost target limit reached) and the to 4 (LPFP flow capacity limit reached) - I don’t usually see these even at higher target load values (250% and more). I’d suggest to run a few custom test maps to see if there is some kind of software bug triggering these limits - shoot me a PM if you are up for it😌

[hellcat2m4]

I agree something is weird here.

The regular Stage2 E50 OTS map usually targets much higher timing than this. (15-16degrees), and I want to say roughly 25-26psi.

https://www.bootmod3.net/log?id=65b9...29f5128a3bf411

This is mine on the OTS E50 for reference. (the pull is at the end)

[M4Martin]

Originally Posted by alyabiev

Boost pressure measurement in the logs is absolute (ambient air pressure included), so the actual (relative) boost pressure is around 21-22psi only. Load targets seem to be quite low due to Load Limit Flag set to 2 (boost target limit reached) and the to 4 (LPFP flow capacity limit reached) - I don’t usually see these even at higher target load values (250% and more). I’d suggest to run a few custom test maps to see if there is some kind of software bug triggering these limits - shoot me a PM if you are up for it😌

I'm confused, what metric are you looking at in the log to get "Load Limit Flag set to 2 (boost target limit reached) and the to 4 (LPFP flow capacity limit reached)"

[alyabiev]

Originally Posted by M4Martin

I'm confused, what metric are you looking at in the log to get "Load Limit Flag set to 2 (boost target limit reached) and the to 4 (LPFP flow capacity limit reached)"

The “(RAM) Rel. Fill. Limit Flag” parameter shows the exact reason of why the target load has been reduced from initial setpoint.

[M4Martin]

Originally Posted by alyabiev

The “(RAM) Rel. Fill. Limit Flag” parameter shows the exact reason of why the target load has been reduced from initial setpoint.

Sorry for all the questions and thank you for answering.

Just so I understand better, the numbers that show with "(Ram) Rel. Fill. Limit Flag" are basically reference codes to the issue the DME is seeing and correcting for? So 1 is related to boost and 4 is related to the lpfp?

Is it the same with the Torque Limit Flags? Is there somewhere I can find a list of what the different flags mean? I tried googling it but couldn't find the answer.

[alyabiev]

Originally Posted by M4Martin

Sorry for all the questions and thank you for answering.

Just so I understand better, the numbers that show with "(Ram) Rel. Fill. Limit Flag" are basically reference codes to the issue the DME is seeing and correcting for? So 1 is related to boost and 4 is related to the lpfp?

Is it the same with the Torque Limit Flags? Is there somewhere I can find a list of what the different flags mean? I tried googling it but couldn't find the answer.

You are correct - these flags show the reason why the load was limited (2 for boost limits, 4 for LPFP flow limits).

Load and Torque calculations are interconnected so the same "flag" thing applies to torque limiting as well.

Load Limit flags:
0: Standardbegrenzung
1: Kondensat
2: ATL Bauteilschutz
3: Grenze HDP-Ansteuerung
4: EKP Förderleistung
5: Tans, KR, Fahrverhalten
6: ATM Bauteilschutzregler
7: Partikelfilter
8: Einspritzdauer

Torque Limit flags:
"Bit - Dec - Description" sets as follows.
0 1 Superklopfer
1 2 kalter Kolben (intern Rf-Begr.
bzw)
2 4 Bauteilschutz Ansaugtemp.
3 8 TMC Schutzkonzept
4 16 Flexfuel
5 32 Mdi-Applikation
6 64 Emissionsbegrenzung
7 128 Bauteilschutz Fettgrenze
8 256 Faktor Kuehlung/Fettgrenze
9 512 Notlauf Zylinderausblendung
10 1024 Mdk-Applikation
11 2048 SG-Slave
12 4096 Begrenzung Kraftstofftemperatur
13 8192 UL-Variante
14 16384 Kraftstofftemp.
15 32768 Notlauf
16 65535 Standard
17 131072 Kondensat
18 262144 ATL Bauteilschutz
19 524288 Grenze HDP-Ansteuerung
20 1048576 EKP Förderleistung
21 2097152 Tans, KR, Fahrverhalten
22 4194304 ATM Bauteilschutzregler
23 8388608 Partikelfilter
24 16777216 Einspritzdauer

[81bear]

Originally Posted by 81bear

Here’s a 3rd and a 4th gear pull.

2022 G80 xdrive
- BM3 stage 2 OTS custom rom
- 94oct
- ER HFC w/ MPE rear
- BMS drop-in filters
- CS trans

https://bootmod3.net/log?id=65e642ddc1bd12726f5aa8e8

https://bootmod3.net/log?id=65e64314c1bd12726f5aa8f0

Updated logs with an E blend of 34%

Logs look relatively clean with little timing correction with the exception of run 4.

Any thoughts on why timing went apeshit on run 4?

Run 1:

https://bootmod3.net/log?id=662551e34f444e12992f343a

Run 2:

https://bootmod3.net/log?id=662553399d6af508eb0b2ac2

Run 3:

https://bootmod3.net/log?id=6625536155de0817d926d062

Run 4:

https://bootmod3.net/log?id=662553e59d6af508eb0b2ac8