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Technical Topics B48 4-Cylinder Turbo Engine / Drivetrain / Exhaust Modifications G20 330e LCI B48B20A - Stage2

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      06-04-2025, 02:41 PM   #1
mstry_
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G20 330e LCI B48B20A - Stage2

Hi guys!

Wanted to share my 330e xDrive LCI (B48B20A) build and results after some work - hope it's useful for other 330e owners.

The car is running mostly 100RON fuel, and has the following mods:

- Dinan Cold Air Intake Part #D760-0059
- Dinan Turbo Inlet Pipe Part #D760-0060
- DCE Parts OPF Delete Resonated Midpipe
- DCE Parts 200 Cell B48 Downpipe Heat Shielded
- H&R Suspension Springs AA30/AP20
- OMP Speed Spacers 15mm
- Ragazzon Valved Exhaust #50.0967.73


The car was tuned by Biesse Racing (Italy) with a custom tune.

Dyno Results:
  • Stock
  • 306 hp 456 Nm
  • Stage 1+ ("safe" map)
  • 340 hp 647 Nm
  • Stage 2
  • 430 hp 699 Nm

I'll include also the dyno graph.
ATM I’m running the Stage 2 map.
I’ve seen other tuners in the EU (like BR-Performance) achieving even more power on the B48B20A 330e G20s. In my case, on the Stage 2 map, the logs during WOT look very good. It was also tested with a full WOT pull in 5th gear on the dyno, with no issues in the logs running a good fuel.

Not sure if that’s the "sweet spot" – what do you guys think or suggest for a 'reliable' daily map?

That being said, my first attempt at a 100–200 km/h run (with 2 people in the car and AC on ) was 11.29 seconds - definitely room for improvement.
0–100 is around 4.8s (not perfect conditions)

Would appreciate any advice from experienced 330e tuners/owners on what you consider a safe and reliable HP/TQ limit for the B48B20A engine with the mentioned mods
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Last edited by mstry_; 12-19-2025 at 11:31 AM..
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      06-06-2025, 04:31 PM   #2
330eJL
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What tunning software is your car on?
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      06-06-2025, 11:36 PM   #3
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My car is G30 530e LCI B48B20A same like yours. This platform is very strong and tough so no ned to be worry. My drag map 100-200kph best time is 9.27s and my my daily map got around 9.6-9.7s.

My car mod
- Bootmod3 custom tune
- High Flow Downpipe 200 cell
- Sport exhaust
- BMC open cone air intake
- WMI (water-methanol injection) 700cc/min
- Stock turbo
- E30-E40 fuel

Drag map -> 485whp
Daily map -> 460-470whp
E30 daily map without WMI is around 450-460whp

**I live in Bangkok warm climate (in fact it is very hot compared to to western). If weather is under 10c, I think I can do less than 9s.
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Last edited by cola.p; 06-06-2025 at 11:42 PM..
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      06-07-2025, 07:08 AM   #4
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Quote:
Originally Posted by mstry_ View Post
Hi guys!

Wanted to share my 330e xDrive LCI (B48B20A) build and results after some work - hope it's useful for other 330e owners.
...
Great! Do you have soundclips? I have 200-cell DP and interested in using that midpipe and removing OPF.

How does it sound? Any drone on any RPM?
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      06-07-2025, 12:47 PM   #5
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Quote:
Originally Posted by 330eJL View Post
What tunning software is your car on?
It's a full custom tune by a local tuner here in Italy, no mhd/bootmod or anything like that.

cola.p amazing stats for a 530e, great to hear!

BmwDriverStockholm I'll share some sound clips later this week. It sounds really good, nothing too aggressive, since I still have the stock muffler + stock valve logic. I've installed a midpipe with a resonator to make it more bassy and reduce drone. At the moment, there's no drone at all! Maybe just a little bit during warm-up around 2K RPMs, but overall, it sounds great! I'd like to install the OEM 30i Performance muffler, but I'm not sure if it fits
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      06-07-2025, 08:58 PM   #6
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Quote:
Originally Posted by mstry_ View Post
It's a full custom tune by a local tuner here in Italy, no mhd/bootmod or anything like that.

cola.p amazing stats for a 530e, great to hear!

BmwDriverStockholm I'll share some sound clips later this week. It sounds really good, nothing too aggressive, since I still have the stock muffler + stock valve logic. I've installed a midpipe with a resonator to make it more bassy and reduce drone. At the moment, there's no drone at all! Maybe just a little bit during warm-up around 2K RPMs, but overall, it sounds great! I'd like to install the OEM 30i Performance muffler, but I'm not sure if it fits
A full custom tune for a g20 330e, whether it's a B or A engine can only be achieved by mhd/bootmod or any "similar" tuning software after the dme is unlocked. I am sure you are tuned by something similar to mhd/bootmod, even if they have their own software. cola.p is right. Your car, even with the A engine, is more than capable of putting down more power than what you're currently putting down reliably. You can still push your car another ~50 hp without any issues.
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      06-09-2025, 12:33 PM   #7
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Quote:
Originally Posted by 330eJL View Post
A full custom tune for a g20 330e, whether it's a B or A engine can only be achieved by mhd/bootmod or any "similar" tuning software after the dme is unlocked. I am sure you are tuned by something similar to mhd/bootmod, even if they have their own software. cola.p is right. Your car, even with the A engine, is more than capable of putting down more power than what you're currently putting down reliably. You can still push your car another ~50 hp without any issues.
Great to hear that! I think the software is based on WinOLS.
330eJL cola.p Do you guys recommend replacing the OEM spark plugs with NGK ones and switching to Dinan ignition coils?
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      06-10-2025, 12:36 PM   #8
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Quote:
Originally Posted by mstry_ View Post
Great to hear that! I think the software is based on WinOLS.
330eJL cola.p Do you guys recommend replacing the OEM spark plugs with NGK ones and switching to Dinan ignition coils?
I recommend switching to one step colder spark plugs like the NGK ones and I don't see the need for upgraded ignition coils for stage 2.
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      06-12-2025, 04:49 PM   #9
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Can someone please take a look at these logs?

100–200 pull 1 on 100 RON fuel and stage2 map
https://datazap.me/u/maestry/log-174...20-21-25-27-33

100–200 pull 2 on 100 RON fuel and stage2 map
https://datazap.me/u/maestry/330eb48...20-21-25-27-33

Do they look okay?
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      06-13-2025, 08:38 AM   #10
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Quote:
Originally Posted by mstry_ View Post
Can someone please take a look at these logs?

100–200 pull 1 on 100 RON fuel and stage2 map
https://datazap.me/u/maestry/log-174...20-21-25-27-33

100–200 pull 2 on 100 RON fuel and stage2 map
https://datazap.me/u/maestry/330eb48...20-21-25-27-33

Do they look okay?
Yes, the logs look really good.
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      06-15-2025, 05:28 AM   #11
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This is something I’m seriously considering too taking the 330e to a safe Stage 2. I’m just trying to figure out what power levels are considered safe without risking engine issues. I still want to be able to drive it hard for decent stretches without worrying. I’ve heard people mention cylinder 4 being a weak point, but not sure if that’s just hearsay. It’s a B48 after all, and those engines have a solid rep supposed to be pretty tough. Curious to hear from anyone who's pushed theirs reliably.
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      06-15-2025, 08:32 AM   #12
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Quote:
Originally Posted by BimmmerMann View Post
This is something I’m seriously considering too taking the 330e to a safe Stage 2. I’m just trying to figure out what power levels are considered safe without risking engine issues. I still want to be able to drive it hard for decent stretches without worrying. I’ve heard people mention cylinder 4 being a weak point, but not sure if that’s just hearsay. It’s a B48 after all, and those engines have a solid rep supposed to be pretty tough. Curious to hear from anyone who's pushed theirs reliably.
My two cents on this - I ran this car with a turbobox pushing 360 HP and 550 Nm on completely stock internals (just a BMC air filter) for a year, and had no issues at all. I’d say a safe combined power for a Stage 2 setup (108 HP electric + ICE) should be around 400 HP depending on fuel and mods. A lot of people in the EU are running 430–450 HP on the A version - check out PSR Parts or BR-Performance fb pages for examples.

Last edited by mstry_; 06-15-2025 at 11:27 AM..
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      06-16-2025, 04:35 PM   #13
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Quote:
Originally Posted by mstry_ View Post
My two cents on this - I ran this car with a turbobox pushing 360 HP and 550 Nm on completely stock internals (just a BMC air filter) for a year, and had no issues at all. I’d say a safe combined power for a Stage 2 setup (108 HP electric + ICE) should be around 400 HP depending on fuel and mods. A lot of people in the EU are running 430–450 HP on the A version - check out PSR Parts or BR-Performance fb pages for examples.
Thanks for that. I’ll definitely look into it, especially since I’m planning to go straight to stage 2, especially if it's quite reliable.
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      06-21-2025, 04:58 AM   #14
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Smile ECU

Hi have you had your ECU Unlocked? if so where did you get it unlocked? i have 2021 330e but have been told Ecu is locked and will need to be unlocked before i can start any sort of remapping.
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      06-21-2025, 05:35 AM   #15
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Quote:
Originally Posted by Guv Singh View Post
Hi have you had your ECU Unlocked? if so where did you get it unlocked? i have 2021 330e but have been told Ecu is locked and will need to be unlocked before i can start any sort of remapping.
Hello, you can only get it unlocked by sending it to femto company, you can do it by yourself or ask your tuner to do so.
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      06-29-2025, 01:26 AM   #16
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Quote:
Originally Posted by mstry_ View Post
Hi guys!

Wanted to share my 330e xDrive LCI (B48B20A) build and results after some work - hope it's useful for other 330e owners.

The car is running mostly 100RON fuel, and has the following mods:

- Dinan Cold Air Intake Part #D760-0059
- Dinan Turbo Inlet Pipe Part #D760-0060
- DCE Parts OPF Delete Resonated Midpipe
- DCE Parts 200 Cell B48 Downpipe Heat Shielded
- H&R Suspension Springs AA30/AP20
- OMP Speed Spacers 15mm


The car was tuned by Biesse Racing (Italy) with a custom tune.

Dyno Results:
  • Stock
  • 306 hp 456 Nm
  • Stage 1+ ("safe" map)
  • 340 hp 647 Nm
  • Stage 2
  • 430 hp 699 Nm

I'll include also the dyno graph.
ATM I’m running the Stage 2 map.
I’ve seen other tuners in the EU (like BR-Performance) reaching similar power levels on the B48B20A 330e, but personally, I don’t think those maps are safe to run daily - at least not without some long-term concerns for rods/pistons.
What do you guys think or suggest for a reliable daily setup?

That being said, my first attempt at a 100–200 km/h run (with 2 people in the car and AC on ) was 11.29 seconds - definitely room for improvement.
0–100 is around 4.8s (not perfect conditions)

Would appreciate any advice from experienced 330e tuners/owners on what you consider a safe and reliable HP/TQ limit for the B48B20A engine with the mentioned mods
Which oil do you drive in this car
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      06-29-2025, 04:01 AM   #17
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Quote:
Originally Posted by robert.bimmer View Post
Which oil do you drive in this car
I'm running on the Bardahl XFS C3 5W40
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      06-29-2025, 04:17 AM   #18
mstry_
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Any suggestions would be greatly appreciated on this guys:
I'm planning to install soon:
- Charge pipe
- Iridium spark plugs
- Oil catch can
(?)
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      07-11-2025, 11:25 AM   #19
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Hi guys, just logged a couple of additional 100-200 runs with better frequency logs..

Could you please help me to analyze them?

1st run:
https://datazap.me/u/maestry/log-175...14-15-16-17-18

2nd run (like 4 minutes later):
https://datazap.me/u/maestry/log-175...12-15-16-17-18

On the 2nd run I noticed some misfires on different cylinders. Any suggestions on what might be causing this?
I'm running the stock OEM spark plugs (part number 12122455258), which are NGK heat range 8 - and should be sufficient. The car has around 45,000 km.
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      07-14-2025, 05:22 PM   #20
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Quote:
Originally Posted by mstry_ View Post
Hi guys, just logged a couple of additional 100-200 runs with better frequency logs..

Could you please help me to analyze them?

1st run:
https://datazap.me/u/maestry/log-175...14-15-16-17-18

2nd run (like 4 minutes later):
https://datazap.me/u/maestry/log-175...12-15-16-17-18

On the 2nd run I noticed some misfires on different cylinders. Any suggestions on what might be causing this?
I'm running the stock OEM spark plugs (part number 12122455258), which are NGK heat range 8 - and should be sufficient. The car has around 45,000 km.
You need to add more parameters on the logs or better yet, export the logs in csv format, so it's easier to analyze. But I don't see misfires on different cylinders. I see a misfire on cylinder 2 in the beginning of the pull in the second run. I don't think this is serious. I'd be worried if you are seeing multiple misfires or repeated misfires on the same cylinder through out the pull. And multiple knock retards through out the pull.
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      07-15-2025, 12:24 PM   #21
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Quote:
Originally Posted by 330eJL View Post
You need to add more parameters on the logs or better yet, export the logs in csv format, so it's easier to analyze. But I don't see misfires on different cylinders. I see a misfire on cylinder 2 in the beginning of the pull in the second run. I don't think this is serious. I'd be worried if you are seeing multiple misfires or repeated misfires on the same cylinder through out the pull. And multiple knock retards through out the pull.
Could you suggest what to add? I'm using bimmerlink and have the CSV - just uploaded it to datazap to get the graph view.
It looks like sporadic misfires recorded using bimmerlink logging are fairly common on the B48 and shouldn't be an issue - but still
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      07-15-2025, 01:57 PM   #22
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Quote:
Originally Posted by mstry_ View Post
Could you suggest what to add? I'm using bimmerlink and have the CSV - just uploaded it to datazap to get the graph view.
It looks like sporadic misfires recorded using bimmerlink logging are fairly common on the B48 and shouldn't be an issue - but still
Not sure how bimmerlink logging works but add everything availabe if possible or at least add WGDC, Ignition timing for each cylinder, ignition timing corrections for each cylinder, Load Target, load actual, throttle angle, gear.
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