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Technical Topics B58 6-Cylinder Turbo Engine / Drivetrain / Exhaust Modifications Bm3 flex fuel vs OTS e50

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      12-21-2023, 09:46 AM   #1
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Bm3 flex fuel vs OTS e50

So recently I had a bm3 flex fuel sensor installed into my car and started to use the bm3 stage 2 multi map to take advantage of flex fuel. My first fill up on flex fuel I filled without any measuring and it ended up at e46. It most definitely felt faster, but in my head I thought it felt slower than I remember the e50 map feeling, but I chalked it up to it being e46 not e50. Now I filled an e50 tank the other day and it still felt sluggish using flex fuel, so I flashed the e50 map to see if it was in my head or not. It wasn’t in my head, anyone else know why the flex fuel map would be slower even though it has the same level of e in the tank? Also, I did confirm with bm3 that the sensor was indeed functioning correctly by sending them a log and they confirmed it was ok.
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      12-21-2023, 10:29 AM   #2
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Its probably all in your head and its not slower, but to be 100% sure, datalog both mixes
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      12-21-2023, 09:05 PM   #3
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Quote:
Originally Posted by Jnasratyar View Post
So recently I had a bm3 flex fuel sensor installed into my car and started to use the bm3 stage 2 multi map to take advantage of flex fuel. My first fill up on flex fuel I filled without any measuring and it ended up at e46. It most definitely felt faster, but in my head I thought it felt slower than I remember the e50 map feeling, but I chalked it up to it being e46 not e50. Now I filled an e50 tank the other day and it still felt sluggish using flex fuel, so I flashed the e50 map to see if it was in my head or not. It wasn’t in my head, anyone else know why the flex fuel map would be slower even though it has the same level of e in the tank? Also, I did confirm with bm3 that the sensor was indeed functioning correctly by sending them a log and they confirmed it was ok.
Pls let me know the results you pull out of testing. I wanna see what type of situation I’ll probably end up in and the best solution for it
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      12-21-2023, 09:28 PM   #4
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Originally Posted by mike@x-ph.com View Post
Its probably all in your head and its not slower, but to be 100% sure, datalog both mixes
Idk, I was kinda ruling it out as that in the first place, but I literally did a pull, parked and reflashed, did another pull and I noticed immediately. Its just not as jumpy, like the low end is sluggish, but the top end is about right.
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      12-21-2023, 10:37 PM   #5
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Originally Posted by JackMK View Post
Pls let me know the results you pull out of testing. I wanna see what type of situation I’ll probably end up in and the best solution for it
Not really sure if there is a “solution” for this. Might just be how flex fuel is and I’m just retarded, but since bm3 already confirmed everything looks ok my only options for help are here and the fb group so we’ll see. In the mean time I just been using the sensor to confirm my mixes and just running the e50 map.
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      12-22-2023, 02:10 PM   #6
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Have you been able to get into contact with BM3/protuning freaks at all this week? I sent them an email with my unlock file from Femto on Monday and haven't heard back from them. I'm thinking they're out for the holidays since they have always been super responsive. I installed the flex fuel sensor and have the same maps set to download. I'll let you guys know if I experience anything different.
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      12-22-2023, 02:40 PM   #7
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Originally Posted by Boostisfun View Post
Have you been able to get into contact with BM3/protuning freaks at all this week? I sent them an email with my unlock file from Femto on Monday and haven't heard back from them. I'm thinking they're out for the holidays since they have always been super responsive. I installed the flex fuel sensor and have the same maps set to download. I'll let you guys know if I experience anything different.
Haven’t made an attempt to contact them. Not much more they can tell me, already sent them the codes thrown and a log and they said everything was fine.
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      12-23-2023, 08:50 PM   #8
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Should make similar power, actually make a log on both and send it to support@protuningfreaks.com Tech Support team usually responds within 48-72hrs
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      12-24-2023, 05:18 AM   #9
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only way to tell for sure is log both, check boost pressure, timing, and load. Numbers don't lie.
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      12-24-2023, 06:21 AM   #10
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Compare Dragy 60-130 on both maps maybe
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      12-24-2023, 11:34 AM   #11
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I’ll run logs on both today possibly and see.
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      12-24-2023, 11:37 AM   #12
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Originally Posted by Bigslick2332 View Post
Compare Dragy 60-130 on both maps maybe
Don’t have a draggy, but that would be a good idea 😭
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      03-14-2024, 01:48 AM   #13
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Any updates bro?
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      03-14-2024, 12:27 PM   #14
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Any updates bro?
Nah not really, never really looked into it. Pretty sure it was just in my head.
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      03-21-2024, 11:57 AM   #15
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Quote:
Originally Posted by Jnasratyar View Post
Nah not really, never really looked into it. Pretty sure it was just in my head.
Part of me doesn’t think it’s all in your head. I just flashed yesterday and I swear multimap stage 2 93 is not as fast as the regular stage 2 93 map
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      03-22-2024, 12:22 AM   #16
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Quote:
Originally Posted by Jnasratyar View Post
So recently I had a bm3 flex fuel sensor installed into my car and started to use the bm3 stage 2 multi map to take advantage of flex fuel. My first fill up on flex fuel I filled without any measuring and it ended up at e46. It most definitely felt faster, but in my head I thought it felt slower than I remember the e50 map feeling, but I chalked it up to it being e46 not e50. Now I filled an e50 tank the other day and it still felt sluggish using flex fuel, so I flashed the e50 map to see if it was in my head or not. It wasn’t in my head, anyone else know why the flex fuel map would be slower even though it has the same level of e in the tank? Also, I did confirm with bm3 that the sensor was indeed functioning correctly by sending them a log and they confirmed it was ok.
Multi Map or On the Fly Map Switching makes these cars slower. Always much better to do a full flash to the desired map. Same thing with MHD+, car feels way more dead when using E40 Map with map switching. Full flash is the way to go, takes some time and little annoying but unlocks full potential of the tune.
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      03-22-2024, 12:42 AM   #17
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Originally Posted by hayko_M340 View Post
Multi Map or On the Fly Map Switching makes these cars slower. Always much better to do a full flash to the desired map. Same thing with MHD+, car feels way more dead when using E40 Map with map switching. Full flash is the way to go, takes some time and little annoying but unlocks full potential of the tune.
I honestly wanna just run the e50 tune full time, but I’m just a little sus about it cause sometimes my mix is like e48 or e51 and I’m not sure how bad that is for the engine when running an e50 map.
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      03-22-2024, 11:02 AM   #18
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Quote:
Originally Posted by RNigel View Post
Part of me doesn’t think it’s all in your head. I just flashed yesterday and I swear multimap stage 2 93 is not as fast as the regular stage 2 93 map
The multi-map does not provide the max power, it provides the flexibility of not having to reflash every time you change fuel. Its way more useful when you are using E85.

if you are not changing fuel octane, you are better off selecting the dedicated map for that fuel instead of the multimap
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      03-22-2024, 11:04 AM   #19
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Quote:
Originally Posted by mike@x-ph.com View Post
The multi-map does not provide the max power, it provides the flexibility of not having to reflash every time you change fuel. Its way more useful when you are using E85.

if you are not changing fuel octane, you are better off selecting the dedicated map for that fuel instead of the multimap
This is exactly what I was thinking in my head when I noticed the change. I figured this much. Thanks for confirming
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      03-22-2024, 11:30 AM   #20
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Actually… what you need to be doing is looking at the interpolation values when you’re running the multimap. The multimap can and does provide more power, provided you’re at the correct ethanol content for it. It will vary from map to map, however on the ACN91 ST2 multimap, roughly E60-62 gets you 1.0 for all of the different interpolation values. The car is noticeably faster than the E50 OTS map.
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      03-22-2024, 11:32 AM   #21
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Actually… what you need to be doing is looking at the interpolation values when you’re running the multimap. The multimap can and does provide more power, provided you’re at the correct ethanol content for it. It will vary from map to map, however on the ACN91 ST2 multimap, roughly E60-62 gets you 1.0 for all of the different interpolation values. The car is noticeably faster than the E50 OTS map.
Oh really? I didn’t even know we were able to go past e50. So you have filled e60 and no issues?
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      03-22-2024, 11:33 AM   #22
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Quote:
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Oh really? I didn’t even know we were able to go past e50. So you have filled e60 and no issues?
Yes. I’ve been running E60 for months with no issues.
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