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M2 Technical Topics > N55 Engine / Drivetrain / Exhaust / Bolt-ons / Tuning > Latest ISTEP flashed.. much improved

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      09-21-2020, 02:32 AM   #529
mr_lab_rat
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Quote:
Originally Posted by Dasnub View Post
I am getting my taillights replaced on my ‘17 first week of October and they are reflashing for me then as well. I’ve always been afraid to code ASD off in BimmerCode as my understanding was you can’t flip it back on again... thinking this might be my chance to try it. Will the reflash turn it back on again I assume, in the event I prefer it on?

I had the ASD harness on my M235i but that car had a downpipe so it was ABSOLUTELY necessary. Have had another one I bought for the M2 before I even picked it up but haven’t installed it as the ASD is not really that intrusive on a stock DP.
The ASD coding is 100% reversible, not sure where you got that misinformation.

Edit, it actually looks like there are cases where it can happen and you need to reflash ISTEP to reset it.

Last edited by mr_lab_rat; 10-12-2020 at 05:39 PM..
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      10-07-2020, 08:49 PM   #530
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Had my iStep updated today and can confirm at the very least that traction control is much less intrusive on my stock ‘17 M2. I can feel substantially more wheel spin in a straight line (not cutting power like before) and it gets sideways harder- to the point I dropped it down to sport as she really likes to kick the tail out further now. I’d say this is one thing I can unequivocally tell was different- nothing subtle about it. A positive change as you don’t feel power pulled out from under you by the ECU like before.

Steering feels good but hard to determine if it’s placebo after coming out of a soft X2 loaner. I never really actively disliked the steering to start with. No noticeable change to burbles at all- still lots of them in both Sport+ and MDM. I also notice no change in the peak volume level of ASD- and that’s coming from an audio engineer with a very sensitive ear. It did, however, seem to be louder under load and quieter when riding the pedal at a consistent speed, so it drones a bit less on the freeway. As soon as you give it some gas it seems to spike back up to the level I was used to. I also think they’ve tweaked the frequencies some as it seems to have a lot less useless low end bassy, muddy rumble.

Last (and most important) thing I’ll be keeping an eye on is lag between shifts. Don’t expect an improvement there, but hopeful.

Last edited by Dasnub; 10-07-2020 at 09:05 PM..
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      10-12-2020, 03:37 PM   #531
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Has anyone compiled a list of what is specifically changed on what software updates?

I just bought a 2018 LCI M2 that is still running the istep version it came with from the factory. I don't find the steering anywhere near as bad as I was expecting, I suspect it already has improvements compared to the 2016 cars. I just don't want to go through the hassle of either trying to convince my dealer to update or finding someone else to do it if most/all of the important improvements are updated.

I'm also seeing conflicting reports of whether the current istep prevents flash tuning on these N55 cars? I've seen posts saying all BMW's are affected, but others say it's only S55 cars. Can anyone clarify?

Thanks.
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      10-13-2020, 12:02 AM   #532
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Quote:
Originally Posted by JustAWhisper View Post
Has anyone compiled a list of what is specifically changed on what software updates?

I just bought a 2018 LCI M2 that is still running the istep version it came with from the factory. I don't find the steering anywhere near as bad as I was expecting, I suspect it already has improvements compared to the 2016 cars. I just don't want to go through the hassle of either trying to convince my dealer to update or finding someone else to do it if most/all of the important improvements are updated.

I'm also seeing conflicting reports of whether the current istep prevents flash tuning on these N55 cars? I've seen posts saying all BMW's are affected, but others say it's only S55 cars. Can anyone clarify?

Thanks.
BMW last updated the N55 iStep in Spring 2019 I believe- before they started locking out DMEs. Shouldn’t be an issue to tune any OG M2. Can’t speak to whether the 2018 is worth updating.
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      10-13-2020, 12:46 AM   #533
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Quote:
Originally Posted by Dasnub View Post
BMW last updated the N55 iStep in Spring 2019 I believe- before they started locking out DMEs. Shouldn’t be an issue to tune any OG M2. Can’t speak to whether the 2018 is worth updating.
latest version is F020-20-07-540 (July 2020). There's no DME lock on the N55 (and no update for the DME).
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      10-20-2020, 04:37 PM   #534
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Here is it!
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      06-16-2021, 08:15 PM   #535
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If my dealer won’t do it, what other options would I have? I’m running BM3 if it has any connection to this.
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      06-16-2021, 08:26 PM   #536
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Quote:
Originally Posted by vrooooom View Post
If my dealer won’t do it, what other options would I have? I’m running BM3 if it has any connection to this.
Kubax86 on here can do it remotely with esys loaded on your laptop. The tough part is you'll also need to source an icom Ethernet to obd2 adapter and power supply. The oem icoms run about $700 and a real power supply for about $500.

You can do it with a Chinese knockoff icom and battery charger/another vehicle but the risk of bricking your ecu goes up greatly. The whole process takes a few hours.
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      06-16-2021, 10:09 PM   #537
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Ah crap so i'm out luck. $1200 for one-time-use equipment alone.
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      06-17-2021, 10:37 AM   #538
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Ah crap so i'm out luck. $1200 for one-time-use equipment alone.
The dealer will do it for $150 or so.
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