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M2 Technical Topics > N55 Engine / Drivetrain / Exhaust / Bolt-ons / Tuning > bootmod3: CustomROM release - Map Switching, Flex Fuel, AntiLag, New Map Editor...

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      06-18-2021, 06:53 PM   #23
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Antilag makes a huge difference for me when doing rolling races on my pure stage 2 setup. I can spool while 1-2-3 counting down and let go of the antilag button on the steering wheel and it catapults the car forward as you get instant torque in that moment like an electric motor car. It literally gets rid of any lag and this means a lot when roll racing against someone. I do quite a bit of that around my neck of the woods LOL
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      06-19-2021, 02:31 PM   #24
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Quote:
Originally Posted by CalAcacian View Post
Quote:
Originally Posted by SeanWRT View Post
The info from the link is very outdated anti lag method. I don't think any BMW engine ever made pre builds boost with retarded ignition off throttle.
If you read the BM3 link, that is what is happening here. There are changes to lambda and ignition timing. That's really the only effective way to achieve anti-lag through purely tuning changes. BM3 clearly doesn't strap an external combustor to the vehicle or create new valving pathways on the intake.

The short answer is yes, this will cause accelerated wear to down stream components like the exhaust valve, turbo, and cats by exposing them to higher pressures and heat. I can't speak to the amount of wear, but anti-lag isn't something you should be using often anyways.

Think of it like the race start function. Use it rarely with the understanding that you are stressing the components. Or don't use it at all. I've found that anti-lag really doesn't make much of a difference on Stage 2 93 octane. So I probably won't use it. But it's a cool feature to have.
Pretty sure it's the same method as how the burble is done. Except with anti lag likely getting more open throttle and further retard of timing. Also, burble doesn't happen at high loads.
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      06-19-2021, 03:19 PM   #25
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Im still confused as how this works. Please forgive the ignorance. What happens if i flash the stage 2+ custom rom maps WITHOUT an ethanol sensor? I have all the hardware required for it except the sensor. I really want the map switching function to go between 93 and e30. If i dont have the sensor yet, will the ecu default to using just the base e30 calibration? Like it assumes you have at least 30% ethanol in the tank just like the old stage 2+ e30 map that i have flashed right now and there wont be a problem running it?
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      06-19-2021, 03:42 PM   #26
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Quote:
Originally Posted by Dj_Quik View Post
Im still confused as how this works. Please forgive the ignorance. What happens if i flash the stage 2+ custom rom maps WITHOUT an ethanol sensor? I have all the hardware required for it except the sensor. I really want the map switching function to go between 93 and e30. If i dont have the sensor yet, will the ecu default to using just the base e30 calibration? Like it assumes you have at least 30% ethanol in the tank just like the old stage 2+ e30 map that i have flashed right now and there wont be a problem running it?
I believe this is how it works but needs clarified. This is how I intend to use the new feature. I'd maybe be interested in the flex fuel sensor if more E meant more timing beyond e30 but at this point in time it doesn't according to the map notes.

I also presume its the regular stage 2 93 map and not the potential stage 2+ 93 map thats used in the stage 2+ mulitmap?
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      06-19-2021, 03:59 PM   #27
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Yeah defs need more clarification. But itd be nice to use the 93 map while cruising around just coz its easier on the turbo and less stress on the motor overall if youre daily driving. But when someone wants the smoke, switch to e30 map. Of course this means id have to keep at least e30 in my tank at all times which really isnt a big deal for me. But itd be nice to know what the customrom map does without an ethanol sensor in the meantime
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      06-19-2021, 04:02 PM   #28
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Anither thing im wondering about is how the scaling works with the e30 map? If it doesnt detect the sensor, will it scale down as if theres zero ethanol in the tank? Unless of course you manually scale to 30% EVERYTIME you start the car?
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      06-19-2021, 06:24 PM   #29
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Guys, the CustomMap stuff has been discussed and is pretty simple to understand.

If you have an FF sensor, whatever map you select on the Stage 2+ multimap will autoscaled based on ethanol content.

If you do no have an FF sensor, it will tune based on whatever the map defines. (E30, E10, or race gas).

You can select which map you want to use via the steering wheel.

The question mark comes into play on if the map selection is saved between restarts of the car. I'm assuming it does, because that would be super annoying to have to change everytime you start it back up.
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      06-19-2021, 09:43 PM   #30
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Does anyone know if 93 map in stage2+ is the same as the one in stage2?

If they are not, could I set the HPFP in OEM and flash stage2+ and give it a try?
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      06-19-2021, 09:51 PM   #31
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Quote:
Originally Posted by Alex Wang Lee View Post
Does anyone know if 93 map in stage2+ is the same as the one in stage2?

If they are not, could I set the HPFP in OEM and flash stage2+ and give it a try?
Stage 2+ requires an upgraded HPFP.
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      06-19-2021, 10:32 PM   #32
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Quote:
Originally Posted by detroitm2 View Post
Guys, the CustomMap stuff has been discussed and is pretty simple to understand.

If you have an FF sensor, whatever map you select on the Stage 2+ multimap will autoscaled based on ethanol content.

If you do no have an FF sensor, it will tune based on whatever the map defines. (E30, E10, or race gas).

You can select which map you want to use via the steering wheel.

The question mark comes into play on if the map selection is saved between restarts of the car. I'm assuming it does, because that would be super annoying to have to change everytime you start it back up.
Yeah last map selected saves between restarts. I kept mine in map slot 4 since yesterday.
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      06-19-2021, 10:48 PM   #33
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Quote:
Originally Posted by MTWO View Post
Yeah last map selected saves between restarts. I kept mine in map slot 4 since yesterday.
You running an ethanol sensor?
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      06-20-2021, 12:37 AM   #34
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Quote:
Originally Posted by MTWO View Post
Quote:
Originally Posted by detroitm2 View Post
Guys, the CustomMap stuff has been discussed and is pretty simple to understand.

If you have an FF sensor, whatever map you select on the Stage 2+ multimap will autoscaled based on ethanol content.

If you do no have an FF sensor, it will tune based on whatever the map defines. (E30, E10, or race gas).

You can select which map you want to use via the steering wheel.

The question mark comes into play on if the map selection is saved between restarts of the car. I'm assuming it does, because that would be super annoying to have to change everytime you start it back up.
Yeah last map selected saves between restarts. I kept mine in map slot 4 since yesterday.
Thanks for clarifying!
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      06-20-2021, 03:39 AM   #35
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Quote:
Originally Posted by detroitm2 View Post
Stage 2+ requires an upgraded HPFP.
Thank you! Well understood.
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      06-20-2021, 12:23 PM   #36
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Has anyone tried to reduce burbles on this flash? I've turned everything down but it's still popping like crazy in sport +
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      06-20-2021, 12:41 PM   #37
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Quote:
Originally Posted by eldogo View Post
Has anyone tried to reduce burbles on this flash? I've turned everything down but it's still popping like crazy in sport +
Dzen posted at one time that Burble settings are only applicable to map slot 1 in the multimap tunes. I assume remainder of map slots uses the ots Burble
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      06-20-2021, 01:32 PM   #38
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Quote:
Originally Posted by designatedposter View Post
Dzen posted at one time that Burble settings are only applicable to map slot 1 in the multimap tunes. I assume remainder of map slots uses the ots Burble
Bleh, this alone would get me to not use this feature.
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      06-21-2021, 06:04 PM   #39
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Quote:
Originally Posted by eldogo View Post
Has anyone tried to reduce burbles on this flash? I've turned everything down but it's still popping like crazy in sport +
Try this: go to OTS maps menu (not My maps) → select a fresh map that you are currently running → make desired changes to it → click on SAVE → click on Download Now Flash Later → click on Flash
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      06-21-2021, 06:09 PM   #40
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I use the Live Adjust screen now for burble. Any map slot I’m in I can adjust it any way I like any time in the car.
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      06-21-2021, 06:17 PM   #41
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Quote:
Originally Posted by MTWO View Post
Antilag makes a huge difference for me when doing rolling races on my pure stage 2 setup. I can spool while 1-2-3 counting down and let go of the antilag button on the steering wheel and it catapults the car forward as you get instant torque in that moment like an electric motor car. It literally gets rid of any lag and this means a lot when roll racing against someone. I do quite a bit of that around my neck of the woods LOL
I just had a chance to use it yesterday on the freeway with a G82 M4 and it seemed to work better that time. I think I may not have let it sit on the anti-lag long enough previously to build the target boost.

Nothing crazy on Stage 2 93 and a stock turbo, but still pretty good.
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      06-21-2021, 06:23 PM   #42
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Considering these are my preferred burbles settings, OTS default on secondary, tertiary maps, and playing with them via Live Adjust is a no go for me.

Altho, I assume if I set my preferred burbles on a Multimap and run a flex fuel sensor, the burbles will be the same as the tune scales bn 93 & E50?
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      06-23-2021, 05:37 PM   #43
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Quote:
Originally Posted by MTWO View Post
I use the Live Adjust screen now for burble. Any map slot I’m in I can adjust it any way I like any time in the car.
I turned it down to 0 in the live adjust but it's still burbling
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      06-23-2021, 09:27 PM   #44
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Yeah at zero its just a little but basically normal exhaust burble sound, not something aggressive
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