12-11-2012, 03:30 PM | #23 | |
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12-11-2012, 03:33 PM | #24 |
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12-11-2012, 03:35 PM | #25 | |
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Are you saying in sport mode the car runs more rich? |
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12-11-2012, 03:36 PM | #26 |
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The manual isn't clear on this. Upon re-reading it, however, I'm now leaning towards thinking that yes, you're right, SPORT+ is SPORT plus DTC, meaning the stability program is disabled but traction control is still active. Which is sad, because it'd be great to be able to get power-slides in SPORT+. (Although maybe that's not possible anyway due to the open diff, so power slides aren't possible even in DSC OFF mode, just a whole lot of inside wheel spin?)
I'll amend my above post appropriately. |
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12-11-2012, 03:41 PM | #27 |
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Actually, I think DTC equals no correction of under- or over-steer conditions, but it'll still cut engine power or apply brakes to stop wheel spin due to power application.
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12-11-2012, 03:44 PM | #28 |
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That's not really correct, IME. With DTC on, you can still break the rear end loose, but not completely spin out. The car monitors your steering angle, speed and such and will let you slide, but not spin out. Over steer is definitely possible.
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12-11-2012, 04:01 PM | #29 | |
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The car wont prevent you from being bonkers, even in comfort on wet pavement you can spin the wheels from a stop or make the car get sideways pretty easily (70% throttle). Traction control with flash and yell at you but the rpms hitting 5-6k with the car barely moving was an interesting thing I noticed. I dont think it cuts engine power, but brakes the appropriate wheel and tries to get traction to get you going in the right direction. I wasn't trying to do anything crazy but the streets were a bit wet and I turned onto another street and gave it about medium throttle (in comfort mode) and the wheels spun pretty easily. Obviously, this was mostly due to wet pavement but still... To get the same reaction you'd have to turn it to sport + and really get on it, but it's still possible to break the tires loose without power breaking. /end obvious post |
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12-11-2012, 04:55 PM | #30 | |
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Regarding the 135i, one of the features of the PPK for the N55 E90 and 135i was the addition of exhaust overrun burble sounds. In the long F30 N55 PPK thread (Here), there was a 135i owner who commented that his 135i originally had the pronounced overrun burble sound, but after the PPK was released, and his car received subsequent software updates, the burble went away...he posited the conspiracy theory that once the PPK was on the market, BMW eliminated the burble on the 135i through software updates to get people to pony up for the new PPK since the burble sound was touted as a benefit of the PPK upgrade (here is his post) |
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12-11-2012, 04:56 PM | #31 | |||
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This is BMW description for the F10. Sure it is the same in the F30. Quote:
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12-11-2012, 07:52 PM | #32 | |
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DTC is "dynamic traction control", key word is "dynamic". DTC is part of DSC. When DTC is engaged it allows wheel spin and rear end out to a greater degree before DSC steps in. For practical purposes engaging DTC (pushing DSC button once) can help the car get unstuck if it's in snow and you need wheel spin to get the car out. For fun, DTC (with either one push of DSC or sport+ engaged) allows the drive tires to spin on a hard launch as the ECU won't cut throttle in order to regain traction. DTC also allows the driver to have some fun with a bit of "drifting". It's not at the same level as turning DSC completely off as DTC will still intervene by braking and/or throttle cut if the rear swings past a certain degree. DSC completely off will turn traction and stability completely off. This is the mode for experienced drivers as any mistake can't be helped by the stability system. With my 135i this was easy to understand. If I want some wheel spin and some drift angle, but also have DSC step in if things get too far, then press the DSC/DTC button once and engage DTC. The rest of the car; steering, throttle stay as they are, as there was no choice. I had an MT 135i. If I wanted full control and no stability ECU intervening, then I push the DSC button for at least 5 seconds and it's all off. The F30 confuses the use of DSC and DTC as it ties drivers modes with it. If I'm in sport mode and I hold the DSC button, "DSC OFF" will light up on the dash. If I then turn DSC back on, drivers mode looks like it drops down to "comfort" mode, instead of staying in sport mode. Really odd. Makes one wonder if they are still in sport mode if they turn DSC off while in sport mode. ARRRRGH! When I'm in sport mode and turn DSC off it does feel as if I'm still in sport mode. BUT, my AT operation suggests otherwise, because once DSC is turned off, and I'm in sport mode, the trans will shift to 7th and 8th, which it won't do when driver mode is in sport. Conf*ckingfreakingfusing. More testing is in order as I'm still not 100% positive what happens when I'm in sport driver mode and I manually turn DSC off. |
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12-11-2012, 08:52 PM | #33 |
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in comfort - DSC is ON (DTC is off) - this cuts in to all the wheel spin
when activating DTC (DTC ON) - this allows some wheel spin but still has DSC engaged in case some sort of mishap. I think the confusion is where DTC ON means MORE wheel spin, not less wheelspin. |
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12-11-2012, 10:19 PM | #34 |
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Press Once- Deactivates DSC, Activates DTC
Hold for 5 Seconds- Deactivates DSC and DTC, Simulated LSD stays on (eLSD) So technically you can't turn it off, but the system is not going to prevent the car or both ires from spinning. All it will do is make try to make sure that one single wheel is not spinning. |
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12-12-2012, 02:45 AM | #35 | |
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No, that is not correct. As many posts have stated, DSC remains on with DTC activated.
We must view DTC as a version of DSC, within, or sub-function of DSC. Quoting BMW: Quote:
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12-12-2012, 04:42 AM | #36 |
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How can there be so much confusion with these damn modes?
Can someone explain what each mode is and how it can be activated/deactivated in one nice summery that everyone can agree on? I seen someone tried to summarize but then another person said it was incorrect. |
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12-12-2012, 06:11 AM | #37 | |
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DSC is always ON til you manually turn it off by pressing the button for a few seconds. DTC is a mode that is always OFF unless you put in Sport+ or press the button once, then it is turned ON. (DSC is still ON) DTC allows for some extra wheelspin but DSC is still there to cut in before it gets out of hand. Anyone saying anything else than this, is wrong.
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12-12-2012, 08:01 AM | #38 | |
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Because the owners manual is crap in this regard, IMO. It vaguely describes what the modes are intended to do, but doesn't say diddly about how this is actually achieved. For example, the DTC ON (ie, press the button once) section simply states:
"The DTC system is a version of the DSC in which forward momentum is optimized. The system ensures maximum forward momentum on special road conditions, e.g., unplowed snowy roads, but driving stability is limited. It is therefore necessary to drive with appropriate caution." But what does that mean? I assumed it left traction control on to prevent wheel slippage during acceleration in slippery conditions, with yaw control being disabled, but some other forum members have stated that no, it actually is designed to allow for more wheel slippage during acceleration. WTF, BMW? Quote:
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12-12-2012, 08:01 AM | #39 | |
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12-12-2012, 08:17 AM | #40 | |
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I believe I am still correct about the elsd though. |
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12-12-2012, 10:14 AM | #41 | |
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I believe eDif is activated in Sport+ mode along with Launch control for those who have MT.
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12-12-2012, 10:24 AM | #42 |
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It was like that for years and years on every model. I didn't know they had changed it. The F30 doesn't even have a power button, so your joke is pathetic. I was just trying to help. No need to be a dickweed.
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12-12-2012, 11:08 AM | #43 | ||
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This is how BMW described the DSC-Off function for the F10. Not found a similar statement for the F30, others may have done so and can confirm if it is the same statement.
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PS: Added BMW quote for F30. Quote:
Last edited by HighlandPete; 12-12-2012 at 11:26 AM.. |
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12-12-2012, 12:24 PM | #44 |
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