05-21-2020, 10:25 AM | #23 | |
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Tranny Tune
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Will running the XHP tune on my tranny make it more resilient to hard driving by increasing torque limits and improving shift points or will this place more burden on the transmission by forcing it to perform harder? Basically does the tune HELP the tranny long term or HURT the tranny long term? Not sure if I would be asking too much of it, or preparing it to handle its workload better.
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05-21-2020, 11:03 AM | #24 |
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So when moving to Sport mode (not +) you have push traction once to remove or is default on ? (appears on for me, I think)
You also can hold for 5 second to turn everything off, but only in Sport+ mode ? I have no intention of turning all off, and even at track will use standard Sport mode (dont have LSD). And while I've had enough squirrely cars in past, this computer stuff tougher to gauge. Thx for clarification. |
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05-21-2020, 12:28 PM | #25 | |
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Then pressing and holding for 5 seconds turns both the DSC and its underling DTC completely off. In this mode (also not seen anywhere in the menus or guides) all the nannies are OFF (tires will spin and car will slide with no help) but the ADB/ E-LSD is turned on. Everyone on here says the E-LSD is garbage. Your engine mapping and throttle input are also reduced one level for easier manipulation when in this "ultimate" mode. Sport+ gets sharper settings for engine map and throttle input because with the help of the nannies you can tolerate these settings being turned all the way up. Sport+ does have DTC enabled by default, so this means you have "traction" but are not in "traction mode" because your other attack parameters are still turned all the way up whereas in pure "traction mode" those things are reduced. Basically, if you want DTC on, which means you want some wheel spin and some freedom over your car, you have to pick between "Traction" for less aggressive and "Sport +" for all out aggressive driving. If you turn DSC off, it by nature turns DTC off and E-LSD on. Hold on for dear life because your 400whp vehicle is now under only your control!!! Vert very bad user interface and over complicated system. All drive modes should be visible at all times in the menus and interfaces, and DTC should just be something you enable or disable manually per drive profile. Same for E-LSD. They made it way too hard to understand lol
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05-21-2020, 12:43 PM | #26 | |
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If you don't want all the nannies off, then you want either Sport+ or Traction. Sport+ is pretty awesome with a true LSD out back. There's far less nanny intervention than was there before the LSD. It's my favorite driving mode after adding the LSD. I can't understate how awesome the LSD is. https://www.2addicts.com/forums/show....php?t=1493261
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05-21-2020, 12:57 PM | #27 | |
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Transmissions are rated in torque. A 93 octane Stage 2 flash tuned M235 is making around 380whp/420wtq. That's about 450hp/500tq at the flywheel. These cars are rated at 320hp/330tq, but in reality they closer to 365hp/390tq in stock form (310whp/330wtq stock). So yes, your car is pushing quite a bit more torque than stock. Heat is the big killer in automatics. I think if you aren't tracking the car or driving it hard all the time and are replacing the tranny fluid every 30k miles, it should be fine. If your plans are to make big power, 6MTs are the way to go. They can handle a ton more torque. You can't slam shift them with that sort of power because you'll kill the syncros, but they are far better at tolerating big power and why almost all of 600hp+ turbo BMWs out there are 6MTs.
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05-21-2020, 01:33 PM | #28 | |
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How do get most WITHOUT turning off DSC ? I thought that was Sport (NOT "+") without Traction pressed. (Most being not taking off DSC, but everything else at max) Guess just clicking on Sport and leaving DSC and esp. DTC on best bet for now, and dont hold for 5 seconds...and the chart on page 1, how do you get between all 3 sport modes ? Can you run Sport+ and leave DTC and DSC on ? Last edited by 4Hockey4; 05-21-2020 at 01:38 PM.. |
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05-21-2020, 02:00 PM | #29 |
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I'm googling everywhere lol Seems like most folks drive in Sport+ and only sport in rain ? So confused arrrgghhh
Ok found Sport mode configure in settings. Heading to track this weekend, I'll leave in Sport mode for now, and try and figure out Sport+ (limited DTC) later whew Last edited by 4Hockey4; 05-21-2020 at 02:06 PM.. |
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05-21-2020, 03:00 PM | #30 | |
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Sport+ is not all nannies off. There's still intervention and it won't allow you to get way out of control. If you want to get the most out of the car without DSC Off then Sport+ is the mode you want. Sport mode sucks during hard driving. It's very invasive. I don't run in any of the nanny modes (Comfort, Sport) whether it's wet, dry, snow, etc. Even with higher than stock power, these cars are controllable. You just need to learn what the car is going to do. It takes baby steps to develop that feel. Many of us drove high powered cars without stability control and even ABS. We lived.
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05-21-2020, 03:33 PM | #31 |
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It takes baby steps to develop that feel. Many of us drove high powered cars without stability control and even ABS. We lived.
As have I in past, but none handled like these. (except friends 86 911 Turbo lol) Not sure i want to run Sport+ 1st day at track, when I've been playing in regular Sport all along. Thx for all the info |
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05-21-2020, 03:50 PM | #32 |
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^ditto this. I have got into the habit of holding the button/using DSC off all the time. I prefer the linear throttle, need the help ADB provides since no LSD yet, and still have burbles. I haven't taken the car through winter yet but in the dry there's really no need for nannies unless your driving entirely way too fast on public roads or are tracking
To inject some advanced observations into this, I have 2 questions. First, what is the difference between engine mapping? I can't tell a difference between sport+ and DSC off. Second, I know shift speed is reduced one unit in DSC off, but I'm finding it hard to tell if there is a difference with XHP s3. I think there still is, but with linear vs sport+ throttle it makes it hard to tell. It's pretty easy to induce shift brap (timing retard?) in either mode. Sport+ seems to shift faster but I'm not sure if it's due to the throttle curve |
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05-21-2020, 04:22 PM | #33 | ||
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I am going to flash the tranny tomorrow with XHP map 3 / stage 3. Were going to find out how much abuse these autos will take.
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05-21-2020, 04:24 PM | #34 | |
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DSC = full help mode DTC = reduced help mode Off = no help mode The DSC-DTC relationship is very very confusing and BMW should have done better with their naming conventions and show ALL modes on the GUI in the car including Traction and DSC Off.
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