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      11-02-2014, 07:06 AM   #45
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Originally Posted by GeorgeJ. View Post
As I think about the positives about this I can imagine BMW making changes that preclude owners from accessing this switch or removing it altogether from the software on USA bound vehicles. I would be exceptionally disappointed to acquire an i3, have the hold function enabled, and then a short time later have it permanently taken away.
I seriously doubt they will take away this ability as it will shut up many of the vocal people who want the Rex hold and live in the non CARB states. Having said that, however it will be the people in California who abuse this feature where it is a legal issue with the CARB rules. If a bunch of people start being found doing it in CARB states then maybe it might become an issue, then again just fine those who are breaking the law.
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      10-05-2018, 07:44 AM   #46
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There certainly are things that can be done to increase the output power of the i3... electric motors are not "magic". As long as the applied current, and the resulting stator magnetic field, isn't strong enough to demagnetize the permanent rotor magnets... or the heat build-up doesn't hit the Curie point of the permanent magnets, it won't permanently affect the motor. All of these things are monitored in real-time by the controller to prevent any possibility of such issues.

In fact, the pre-production test mule car (before the i3 chassis was ready) had more power, and it was 100% the same major components as the production car has. As the information I read told it (I'll keep looking for it, I didn't bookmark it!) there was a "little excessive wear" on the output of the final drive... possibly the splined output shaft that didn't engage deep enough, or just a loose fitment, so BMW backed the output power off a little for production.

So, we know that every supporting system is capable of more power... controller current, motor, battery, and cooling for all.

Also, the 2018 i3-S has more power (184hp), most likely restoring some of the original power after improving the part(s) that were experiencing wear... or the 'wear' was determined to be less than they feared. (could be determined by comparing part numbers between 2017/2018 parts)

Remember, all we're talking about is a few seconds at a time... initial acceleration.

Is it "proper"?

Cars are still an expansion/expression of our own personality... or else we'd all be driving something much cheaper. If we few choose to upgrade the acceleration of our cars, so be it... it's not like we're going to affect your car driving experience... you're just going to see our tail-lights more often.
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      10-24-2018, 12:39 PM   #47
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Has anyone had luck locating parameters in the coding for things like regen rate? My 2018 i3 Rex has noticeably weaker braking regen than my 2014. Wish I could adjust this.

-hyp
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      10-29-2018, 11:22 PM   #48
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Quote:
Originally Posted by hyperionbp View Post
Has anyone had luck locating parameters in the coding for things like regen rate? My 2018 i3 Rex has noticeably weaker braking regen than my 2014. Wish I could adjust this.

-hyp
The 2018 is a higher capacity battery. If you are using % as a gauge it's going to be smaller.
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      05-08-2019, 07:44 AM   #49
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So I can't help but notice that pre facelift, post facelift, and "S" i3's all use the same motor (same part number per realoem). That implies to me that there's no hardware changes allowing the additional power from the i3s over the normal i3.

... so how can we upload the i3s "tune" to our normal i3s? Mostly I just want the raised top speed, but more power wouldn't hurt, either :P



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      05-09-2019, 01:35 PM   #50
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How would you enable it? No Sport+ profile on ID5 hardware. No Sport+ button on console.

I3S iDrive upgraded to ID6.
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      05-13-2019, 06:20 AM   #51
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Quote:
Originally Posted by tom @ eas View Post
How would you enable it? No Sport+ profile on ID5 hardware. No Sport+ button on console.

I3S iDrive upgraded to ID6.
Does the i3S only make more power and have the higher top speed when it's in sport mode? Is the engine "tune" stored on the iDrive?

Perhaps I fundamentally don't understand how these cars work. They're certainly vastly different than what I'm familiar/comfortable with!

To your question, I'd guess the "comfort" button vs the "sport" button is probably just a difference of what's silk screened on the switch-- not the underlying electronic functionality.
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Last edited by Obioban; 05-13-2019 at 08:29 AM..
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      05-13-2019, 12:14 PM   #52
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Quote:
Originally Posted by Obioban View Post
Does the i3S only make more power and have the higher top speed when it's in sport mode? Is the engine "tune" stored on the iDrive?

Perhaps I fundamentally don't understand how these cars work. They're certainly vastly different than what I'm familiar/comfortable with!

To your question, I'd guess the "comfort" button vs the "sport" button is probably just a difference of what's silk screened on the switch-- not the underlying electronic functionality.
Tune is within the EDME, not certain if it's activated via the profile or not. I've flashed i3s software to my previous i3, didn't feel much of a difference, if any. My i3S still feels faster than my previous "tuned" i3.

Sport is possibly being activated as a profile, which can't be activated with ID5 hardware. I didn't go any further than that or have strapped the i3S to the dyno to compare.
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      05-13-2019, 05:16 PM   #53
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Interesting would be cool if all we would need to do is unlock this extra hp!
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      05-14-2019, 06:00 AM   #54
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Quote:
Originally Posted by tom @ eas View Post
Tune is within the EDME, not certain if it's activated via the profile or not. I've flashed i3s software to my previous i3, didn't feel much of a difference, if any. My i3S still feels faster than my previous "tuned" i3.

Sport is possibly being activated as a profile, which can't be activated with ID5 hardware. I didn't go any further than that or have strapped the i3S to the dyno to compare.
Was the top speed raised to the i3s's with the i3s EDME flash? The 93mph top speed limitation is easily my biggest annoyance with the car :P
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      05-14-2019, 02:55 PM   #55
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Quote:
Originally Posted by Obioban View Post
Was the top speed raised to the i3s's with the i3s EDME flash? The 93mph top speed limitation is easily my biggest annoyance with the car :P
No idea. Not really the car I'd want to do 90+ in, it's a bit more congested here.
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      05-14-2019, 06:57 PM   #56
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Quote:
Originally Posted by Obioban View Post
Was the top speed raised to the i3s's with the i3s EDME flash? The 93mph top speed limitation is easily my biggest annoyance with the car :P
You are maxing out i3's top speed?
Really?

I was nervous approaching the speed limit, or driving it when an 18 wheeler was in an adjacent lane (major wind whip), never mind pushing 80.

80mph is in an i3 required more concentration and steering corrections than 150 in ///M3.

Quote:
Originally Posted by tom @ eas View Post
No idea. Not really the car I'd want to do 90+ in, it's a bit more congested here.
+1.

a
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      05-15-2019, 05:30 PM   #57
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I've been doing my entire 50 mile each way commute parked at the top speed limiter in the i3. Seriously slow compared to my old e39 530i, which was happy to sit at 120, with bursts into the 130s when needed.

I'm having to leave 10 min earlier in the i3 to get to work on time :P
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      05-16-2019, 01:37 PM   #58
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Perhaps you should buy a Veyron, then you could leave ten minutes earlier!
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      07-25-2019, 08:30 AM   #59
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Ok so the first batch of the i3's where as fast as an i3s 0-60

But we got de-tuned during a dealer visit because of motor mount failure as the motor mount design couldn't take the torque and they made my car slower with the update. And replaced the parts.


When I left the dealer the initial bite from smashing the accelerator was gone and it was a more subdued and slower acceleration. I think it also slowed the 0-60 time as well as bmw started to report slower 0-60 times after the initial run.

So now people buying the i3s are really just enjoying what the first batch of i3's had in the beginning.

Pissed me off.
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      07-25-2019, 01:36 PM   #60
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Quote:
Originally Posted by -c- View Post
Ok so the first batch of the i3's where as fast as an i3s 0-60

But we got de-tuned during a dealer visit because of motor mount failure as the motor mount design couldn't take the torque and they made my car slower with the update. And replaced the parts.


When I left the dealer the initial bite from smashing the accelerator was gone and it was a more subdued and slower acceleration. I think it also slowed the 0-60 time as well as bmw started to report slower 0-60 times after the initial run.

So now people buying the i3s are really just enjoying what the first batch of i3's had in the beginning.

Pissed me off.
Interesting... Do you remember your previous software version before you went to the dealer?

When you say initial bite, do you mean it being able to launch aggressively off the line?

I bought mine used and the initial pause/delay was something I had to get used to launching off the line. I just attributed it to preventing wheel spin, kinda like a quasi-launch control of sorts. Now I'm curious if I'm missing the old launch characteristics. hmmmm...
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      07-25-2019, 08:31 PM   #61
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Quote:
Originally Posted by Alpine003 View Post
Quote:
Originally Posted by -c- View Post
Ok so the first batch of the i3's where as fast as an i3s 0-60

But we got de-tuned during a dealer visit because of motor mount failure as the motor mount design couldn't take the torque and they made my car slower with the update. And replaced the parts.


When I left the dealer the initial bite from smashing the accelerator was gone and it was a more subdued and slower acceleration. I think it also slowed the 0-60 time as well as bmw started to report slower 0-60 times after the initial run.

So now people buying the i3s are really just enjoying what the first batch of i3's had in the beginning.

Pissed me off.
Interesting... Do you remember your previous software version before you went to the dealer?

When you say initial bite, do you mean it being able to launch aggressively off the line?

I bought mine used and the initial pause/delay was something I had to get used to launching off the line. I just attributed it to preventing wheel spin, kinda like a quasi-launch control of sorts. Now I'm curious if I'm missing the old launch characteristics. hmmmm...
Correct so what they did was detune it slightly so the power came gradual so reduce the strain on the motor mount.

This was a recall, it said new mounts but the new mounts also came with a software update that detuned the car.

The overall performance was the same but the acceleration was slightly altered to take the stress off the bolts. As that seems to be the weak part of the car.

https://bmwi.bimmerpost.com/forums/s...1#post19334237
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      07-28-2019, 10:51 AM   #62
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You can program the i3 to be able to turn on the Rex at the 75% battery mark with a Vgate and the BimmerCode app. Simple and intuitive. There are a ton of options you can change in your i3. I'd recommend it to you all.
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      07-28-2019, 01:07 PM   #63
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I had a 2014 i3, and yes the software update for the new mount bolt took a bit of the aggressive edge off of it.

I have a 2019 i3S now, and apart from the HP.. the biggest change is the car, between the sport suspension and wider tires, is ALOT more stable on the highway. It feels like.. somewhat like a normal BMW. The steering is still perhaps a little too quick at top speed, but the car isn't all over the place like a regular i3 as it approaches the limit.
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      10-06-2019, 09:22 AM   #64
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Quote:
Originally Posted by tom @ eas View Post
Tune is within the EDME, not certain if it's activated via the profile or not. I've flashed i3s software to my previous i3, didn't feel much of a difference, if any. My i3S still feels faster than my previous "tuned" i3.

Sport is possibly being activated as a profile, which can't be activated with ID5 hardware. I didn't go any further than that or have strapped the i3S to the dyno to compare.
This is something I've been looking into for a while. Any chance you could post how exactly you did this? Did you just use E-Sys, or some other tool?
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      11-04-2019, 12:36 AM   #65
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I read that the i3s has higher rpm rated bearings fitted in the motor. While this shouldnt prevent tuning mods to the i3 it might be that the overall gear ratio to the wheels is different in the s and they get an increase in torque and power by higher rpm?
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