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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications > B48B20A (20i Variant only) Tuning Discussion
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      07-20-2021, 11:20 AM   #89
mingjs584520
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Quote:
Originally Posted by RMMAGA View Post
FYI here log of my tune running e30

https://www.bootmod3.net/log?id=60d8...729b3fd8cf0f0a

per the stock TQ to Load tables provided your tuner has not messed with them, I have not, we can compare TQ and boost below of your BM3 OTS 91 vs my hybrid turbo custom e30, for general interest,

FYI both IAT were close to 51 deg in the OTS log and 49 deg in my log

380nm @ 4000rpm @ 1.25 bar @ 5.5 deg
466nm @ 4000rpm @ 1.55 bar @ 7.5 deg

375nm @ 5000rpm @ 1.4 bar @ 6 deg
485nm @ 5000rpm @ 1.7 bar @ 12 deg

300nm @ 6000rpm @ 1.3 bar @ 7 deg
475nm @ 6000rpm @ 1.9 bar @ 13.5 deg

275nm @ 6500rpm @ 1.25 bar @ 7 deg
450nm @ 6500rpm @ 2.0 bar @ 14.5deg
I am curious, would you use E30 in daily use? If nothing is changed, is it safe to use e98? This data is so good, I haven't made any changes to my 91oct. Because I want to use it for a long time, maybe e98 can solve my problem. I admire you very much. How should I find it on Taobao and send it to the gas station for refill? (35 yuan makes him stable and perfect, I am very happy)
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      07-20-2021, 11:33 AM   #90
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Quote:
Originally Posted by RMMAGA View Post
I was forced to do an interesting test recently, police got a report of my plate and that my exhaust was modified, and they tracked my car to my work parking lot for inspection

luckily they had no idea how to give me a fine, and impound my car for a week like they were supposed to do, apparently their system can only use local ID numbers, they have no idea what to do with a passport number

but I did promise them I would put back the stock exhaust, and I did

what surprised me is I didnt see any difference in my tune, the WG profile and boost was exactly the same with the stock setup, that was full DP and custom exhaust and just basically strait pipe 3' all the way, and I didnt see any different in my draggy times either

I also put back the stock air filter, for a month in case they checked me again, recently I put back on the ARMA air filter, and I was immediately over boosting, and I needed to retune with lower WGDC to get the tune back to normal, so the turbo was making noticeably more boost then before with the ARMA air filter, after tuned for the same boost power was the same but still interesting, as I was under the impression these were more for the sound and not performance

totally the opposite of what I expected

Interesting, I guess you were tested by the camera to find that the sound was too loud, and you were followed up for investigation. I think the original exhaust of 120 should be 70mm, which affects the speed of exhaust
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      07-20-2021, 09:21 PM   #91
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Quote:
Originally Posted by mingjs584520 View Post
我想问问你的91CHN,LOG显示多少扭矩?之前我想尝试,但是我的销售商告诉我这没必要哈哈哈,听到你 消息我觉得还是运行91OCT,然后用98ron运行吧。
I want to ask how much torque does your 91CHN and LOG show? I wanted to try it before, but my seller told me that it’s not necessary hahaha. After hearing your news, I think I’d better run 91OCT and then run it with 98ron.
can't tell the accurate torque but it's just much weak than standard map,as 老乡 RMMAGA said ethanol will definitely benifit your engine performace but also could have negative effects on your rubber parts.
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      07-21-2021, 08:38 AM   #92
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Originally Posted by ZsAdv View Post
can't tell the accurate torque but it's just much weak than standard map,as 老乡 RMMAGA said ethanol will definitely benifit your engine performace but also could have negative effects on your rubber parts.
你有chn的log吗?可以分享出来,大概看看。是的,我也担心乙醇会对燃油系统和橡胶零件造成影响,所以 还没行动。我和RMMAGA交流了,我很意外他日常使用E30已经行驶了一年…
Do you have chn log? You can share it. Yes, I am also worried that ethanol will affect the fuel system and rubber parts, so I haven't taken any action yet. I talked to RMMAGA, and I was surprised that he has been using E30 daily for a year...
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      07-22-2021, 08:08 AM   #93
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pretty much all BMW fuel system parts for last 15 years are e85 safe, so e30 or e20 is no issue all, and most pump gas is e10 anyway, they sell these cars all over, some in brazil where they run e85, where I am from in Canada by law all fuel is e10, and they plan to increase it every year up to e15 in the next few years, many places in USA are the same, I think China as well most gas you buy is already e10 per government mandate.

I would run not more then e15 without a custom tune that has increased fuel volume however, as if you run e10 you will see about 5-8% higher fuel trims, e15 you will see about 10-12% higher trims. You only have about a +/-20% windows until you may start getting issues. Hence why e15 is as high as you want to go without a custom map. Best to increase the e content and check your trims as you go, if they are correcting by more then 15% on a pull back it off.
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      07-23-2021, 10:38 PM   #94
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anyone have experienced with manic motorsport tune?
i heard its quite popular on MINI, but the company has been dissolved
But now the once tuner of Manic company, offered tune for BMW and MINI, which in the same tier as custom tune.
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      07-30-2021, 11:28 AM   #95
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I have 12k miles on BM3 stage 2, no issues thus far. I've noticed the occasional idle blip at low rpms when the engine is cold, but I am at 44k miles now and suspect this is due to the spark plugs needing some gap adjustments, or the coils are nearing the end of their life. I drive moderately hard on occasion but most of my driving is relaxed.

I have not been data logging, will start soon.
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      08-06-2021, 04:20 AM   #96
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Installed stage 1 on a B48 20i at about 30k miles, I'm now on 69k miles.

I don't horse it around all the time though, most my miles are done on motorways with cruise set to 75mph.

I've had oil changed mostly every 10k miles, just had spark plugs changed yesterday.

A local garage did mention he's had a few tuned 20is in with blown piston, no idea what tune that had though.
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      08-09-2021, 01:02 PM   #97
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Hello,
has been more than 20 days without MG Flasher Support response
I'm desperate.
Please, could you read these datalogs for me? I would know if the car runs safe.
Thank you.
https://logs.mgflasher.com/log/3d0aa...a-4cf1070aea5d

Last edited by Freddie_Rome; 08-09-2021 at 01:16 PM..
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      08-09-2021, 08:48 PM   #98
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Quote:
Originally Posted by Freddie_Rome View Post
Hello,
has been more than 20 days without MG Flasher Support response
I'm desperate.
Please, could you read these datalogs for me? I would know if the car runs safe.
Thank you.
https://logs.mgflasher.com/log/3d0aa...a-4cf1070aea5d
open new ticket
i've experienced same thing with BM3, turns out the previous support ticket has issue, so BM3 doesn't received it, thus 3 weeks no response from them.
When i opened new support ticket, they answered within 24 hours.

for datalog, i think you should perform proper datalog
4th gear, WOT from 2500 to redline, then stop datalog
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      08-10-2021, 06:42 AM   #99
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Quote:
Originally Posted by Luverse View Post
open new ticket
i've experienced same thing with BM3, turns out the previous support ticket has issue, so BM3 doesn't received it, thus 3 weeks no response from them.
When i opened new support ticket, they answered within 24 hours.

for datalog, i think you should perform proper datalog
4th gear, WOT from 2500 to redline, then stop datalog
I'll try to open a new request but maybe they're closed for vacation now. However no notice was issued by them...

Mg Flasher manual provides 2 datalog modalities: 3rd-4th gear WOT (from just under 2.000 rpm) and 4th gear WOT (from just under 2.000 rpm) and I did it.
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      08-11-2021, 08:40 PM   #100
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Quote:
Originally Posted by Freddie_Rome View Post
I'll try to open a new request but maybe they're closed for vacation now. However no notice was issued by them...

Mg Flasher manual provides 2 datalog modalities: 3rd-4th gear WOT (from just under 2.000 rpm) and 4th gear WOT (from just under 2.000 rpm) and I did it.
to the best of my knowledge, i think your ignition timing is quite clean, but you have several timing correction.
what fuel and oct map you use?
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      08-12-2021, 03:51 AM   #101
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Quote:
Originally Posted by Luverse View Post
to the best of my knowledge, i think your ignition timing is quite clean, but you have several timing correction.
what fuel and oct map you use?
95 ron and some 100 ron. Map is Stage 2 custom calibration ACN91
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      08-26-2021, 08:08 AM   #102
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Hello

I am hesitate,

Which one is more safer between MG flasher ou BM3 for a stage1 95ron ?
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      08-26-2021, 08:15 PM   #103
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Quote:
Originally Posted by Makito View Post
Hello

I am hesitate,

Which one is more safer between MG flasher ou BM3 for a stage1 95ron ?
BM3 is used by more people, but some people reported their engine blew, mainly because of poor fuel quality

MG Flasher is used by fewer people, but me personally haven't heard engine blew from this platform
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      08-29-2021, 05:36 AM   #104
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Quote:
Originally Posted by Luverse View Post
BM3 is used by more people, but some people reported their engine blew, mainly because of poor fuel quality

MG Flasher is used by fewer people, but me personally haven't heard engine blew from this platform
Based on the theory that MG Flasher adjusts the knock sensor limits, if used with poor fuel, one would believe it will take longer to detect knock and may result in issues faster than bm3. Most people don't discuss blown motors because they trying to claim for warranty ect. I came across this blown B48 with MG Flasher - not very clearly listed. BM3 is more used which is why people are probably seeing more failures. MG Flasher is relatively new in the business.

Key is logging and maintenance but if pushing hard, the pistons ring land will eventually fail on B48 high compression engines.
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      08-29-2021, 08:36 PM   #105
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Quote:
Originally Posted by F30_330e View Post
Based on the theory that MG Flasher adjusts the knock sensor limits, if used with poor fuel, one would believe it will take longer to detect knock and may result in issues faster than bm3. Most people don't discuss blown motors because they trying to claim for warranty ect. I came across this blown B48 with MG Flasher - not very clearly listed. BM3 is more used which is why people are probably seeing more failures. MG Flasher is relatively new in the business.

Key is logging and maintenance but if pushing hard, the pistons ring land will eventually fail on B48 high compression engines.
agree, 10 blew out of 10,000 tuned car compare to 0 blew out of 500 tuned car, can't justify the tune is good or bad.

nice info on the blown B48 with MG Flasher, this is the first time i saw it blew on MG Flasher.
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      08-30-2021, 08:43 AM   #106
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Been running the stage 2 93 octane bm3 tune for about 8000 miles until I ran into a drivetrain issue. It's a 330e. Drivetrain malfunction...piston ring failure is looking like it's the culprit right now due to improvement on wet compression tests.
38000 miles on the car.
93 top tier gas (Florida) always used and some octane booster added. Happened maybe 500 to 1000 miles after an oil change, coincidence or low quality oil? recommended weight was used
Bm3 looked at my logs a while back and said all my timing was fine. I had no changes in the logs until the CEL

Had this in the wrong section:
F30 330e Bm3 stage 2 drivetrain malfunction https://f30.bimmerpost.com/forums/sh....php?t=1854413
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      08-30-2021, 05:52 PM   #107
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Quote:
Originally Posted by Zac_330e View Post
Been running the stage 2 93 octane bm3 tune for about 8000 miles until I ran into a drivetrain issue. It's a 330e. Drivetrain malfunction...piston ring failure is looking like it's the culprit right now due to improvement on wet compression tests.
38000 miles on the car.
93 top tier gas (Florida) always used and some octane booster added. Happened maybe 500 to 1000 miles after an oil change, coincidence or low quality oil? recommended weight was used
Bm3 looked at my logs a while back and said all my timing was fine. I had no changes in the logs until the CEL

Had this in the wrong section:
F30 330e Bm3 stage 2 drivetrain malfunction https://f30.bimmerpost.com/forums/sh....php?t=1854413
Based on the link you shared, low compression on two cylinders indicates your ringlands possibly have a crack. Very strange the log you posted have -ve boost.
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      09-22-2021, 12:37 PM   #108
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Hi
In France, several tuners proposed at least 300 hp on stage 1 for b48 A variant.
No issues was raised.
Perhaps the gas is better here..
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      09-22-2021, 08:35 PM   #109
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Quote:
Originally Posted by Makito View Post
Hi
In France, several tuners proposed at least 300 hp on stage 1 for b48 A variant.
No issues was raised.
Perhaps the gas is better here..
i'm always in the opinion that the fuel in Europe is better than the rest of the world
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      09-24-2021, 04:42 AM   #110
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In addition:
- Do not change stock air intake
- Use BMW LL04 oil (XW30)
- do not set the engine too lean
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