12-18-2019, 04:36 AM | #1 | ||||||||||
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BMW M2 Anti-Lag braaap sound after lifting the throttle (N55 engines)
Hello everyone,
I have been thinking about what makes this "braaap" sound after lifting the throttle in M2 (non competition). It is done by the wastegate right? Could I possibly implement it on M235i/M240i by purchasing DME/turbo&exhaust manifold from M2 and putting it on 235i/240i? The sound I'm looking for: It sounds like anti lag system, Just to be clear, I'm not looking for other burble tune. Quote:
Here's a quote from @Andrew Quote:
Used DME for M2 cost around ~1.2k I believe. With catless downpipe it sounds even better! Quote:
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Tech Part: Quote:
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It's more like soft limiter but ALS (Anti-Lag System) kicks in and that's why you hear it. Pretty much all M cars does this right now (maybe besides newest M5). Definitely not a "hard cut limiter", even the thing with wastegate which @nioh_lbbm2 said is more realistic than hard cut limiter. Make sure to analyze those two videos. Quote:
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12-18-2019, 10:04 AM | #2 |
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so,
I have a n55 F25 - I have MHD with my own custom DME tune. Nothing I have done to it would make the throttle burble different than stock. I have xHP - flashed to stage 3 OTS I noticed that I get these same noises when I am in DSC OFF mode (hold traction control off for like 4 seconds) which i believe is my equivalent of sport plus - I don't have the driver experience buttons (yet). I also think it's cool as shit. I've found a few places in the DME logic where off-throttle characteristics are tuned. Here are two I've found that aren't in standard definitions, but they really only relate to load. I am working on trying to find the behaviour of each one... |
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12-26-2019, 05:32 AM | #4 |
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The problem is that I don't own yet 235i/435i so I can't do anything by myself atm. I'm super interested in doing this. Like this is a pure game changer when it comes to exhaust sound.
Alright, I'm going to message him, also I will let other people from 235i forums know about this thread. I know that there were few people interested in doing this too. |
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12-27-2019, 05:10 AM | #5 |
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12-27-2019, 09:58 AM | #7 |
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My F25 does this in pretty much all modes when you are on the throttle enough, on BM3 though. Burbles are set to OEM I think.
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12-28-2019, 05:42 PM | #8 |
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12-28-2019, 07:19 PM | #9 |
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Yea this isn’t related to burbles. I’m located down the road from Bob at Stage Fab, they put my downpipe on — if he can figure this out I’ll be having him tune mine as well.
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12-29-2019, 05:04 AM | #10 |
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12-30-2019, 10:23 AM | #11 | ||
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Quote:
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Imagine getting worked up because someone shares data that may help solve your question
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12-31-2019, 04:07 AM | #12 | ||
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You said that your F25 is doing the same thing when you are on "throttle enough". You clearly didn't read my post about it, you went straight to comment section and replied.
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No need to talk about it again, peace. Quote:
Also, for the small update. @julienjj finally got to read an M2 DME last week. He will be trying to get it to work on his n55 soon. The good sign is that you can have this sound even with manual transmission. Our cars are equipped with ZF AT instead of DCT, shouldn't be a problem to get this to work |
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12-31-2019, 06:52 AM | #13 | |
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01-01-2020, 10:21 AM | #14 |
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So you are saying that F25 N55 is doing this and M235i N55 not?
M235i has more aggressive setup (different car concept and purposes) and it's lacking this feature. But wait! Mid-size SUV/compact SUV has this feature by factory Oh c'mon man, why you are trolling? Somebody already warned me about bunch of rednecks telling me it's a burble tune or their cars are doing it with OEM setup That's how f25 sounds with catless downpipe, please tell me when it does it sound like I described in my first post? Like this is not funny anymore, you are lacking of attention or you need to make more post at the forums so you can feel better? Listen, you don't have to prove anything here, me and others a looking for a solution, to get the ALS for non M2 cars. I don't want to start trash talk thread, if you want to talk crap, please switch threads. We are here for one purpose, to get this done and share the knowledge with others. You are not contributing anything to this thread right now. What's the point of replying here if you don't even know what you are talking about? None besides M cars are doing this kind of behavior. We are not talking about the sound while upshifting gears (this is stock/OEM sound). |
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01-02-2020, 01:53 AM | #16 | |
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F25 with stock setup (catted downpipe) is doing the exact same sound just like M2 non competition? Give me a break! |
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01-02-2020, 03:25 PM | #17 |
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Look, if we are here for one purpose, calling eachother names doesn't help, ass.
and YES. the second video you linked at 0:30 is EXACTLY how my F25 sounds when in sport+ with xhp. If you REALLY want me to prove it, I WILL and post a youtube video with it. I'll even get the whole car in the picture just to prove it. EDIT - Also, reread your original post. I find it interesting that you're convinced that a sound comes from a "wastegate." It has nothing to do with a wastegate. In fact, a wastegate has ZERO to do with a brap, fuel overrun, or anything related to this sound. It has to do with ignition timing, injection timing, and the likes. I find it interesting that you seem to be so god damn determined to prove your point without understanding the technical aspect to it. There's no need to even buy an M2 DME - I believe MHD produces a M2 map as the "stock" map to flash (well, for my F25 it does...) In fact, provide me with the hardware code and I can probably produce a M2 bin. There is a repository out there with them in it. Last edited by anjuna; 01-02-2020 at 04:13 PM.. |
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01-02-2020, 03:42 PM | #18 | |
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01-03-2020, 06:59 AM | #19 | |
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Yes, please prove it and show me that I was wrong.
This thread was taken from 2-series forums, that's why you have mixed content in the first post. Quote:
I'm super confused now, that's the OEM stock sound which any 35i is doing.. We are talking about complete different sound which is only available for M cars. |
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01-05-2020, 07:11 PM | #20 |
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Have you tried the BM3 Transmission Flash. It made the throttle blip more pronounced for me. Sounds like the first video you posted but better honestly. Could be because of the AWE. Not sure. F30 N55 fyi.
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01-07-2020, 04:13 PM | #21 |
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Imagine being this difficult to people who are only trying to help.
Sheesh man, you seem to be bad at communication
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01-14-2020, 01:07 AM | #22 |
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Maybe because he's tired of re-explaining what he's actually referring to in his parent post? I find it hilarious that some boomers are chiming in with their so - called 'data' that come from their expansive bmw engineering knowledge and understanding that they've obtained from driving their wives' x3s.
All of your attempts at 'helping' were conjecture and ultimately unrelated to the OP and comes off as annoying. Yet you still continue to speak even after OP shut you down. Instead, you should apologize for filling the thread with incorrect / impertinent posts? |
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