02-24-2017, 05:37 AM | #45 | |
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You have the "from the transmission downstream all parts are same" mentality, and are to some extent right. BMW has "its a different car as a whole" mentality. Its the same reason why for example in Germany it is illegal just to mount GTS wheels on my standard M4. Yes they physically fit, but the police and the authorities dont care: these wheels have not been released for the standard car. Full stop. |
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02-24-2017, 04:01 PM | #46 | |
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edit: sorry, I might be misunderstanding. Illegal for BMW to sell, or illegal for a driver to drive, in Germany? I thought the latter but on second thought I think you're just talking about the former. |
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02-24-2017, 04:41 PM | #47 | ||
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You can apply for a special procedure of individual certification of modifications, where they would check and approve and write it into the registration papers, but costs money and lots of effort. |
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02-24-2017, 05:02 PM | #48 |
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I have it through BM3 and to be honest cant tell much of a difference... the shifts were smooth before and I was in track before and after and did not feel the difference...
Certainly cant say its night and day... |
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02-24-2017, 07:26 PM | #49 |
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I had the GTS DCT flash done by Alex@Alpine today and like it so far. I have a 2015 M3 that had software updated to 59.x last summer. Here are some observations after a brief drive around the city.
First, it seems smoother in stop and go situations, parking lots, places like that. It seems like it can hold the RPMs steady at lower levels while engaging the creeping function or something like that. Not sure exactly, but it requires less throttle input to get it going and keep it crawling, which makes for smoother starting. Second, my previous update to 59.x software made the downshift from 3rd to 2nd while braking to a stop in D2 (my default driving setting) very harsh. The GTS flash has smoothed that out, which was my biggest hope. Finally, it does behave differently than before in many situations. I think it holds gears a bit longer than before in D2, but I'm not positive yet. When I brake hard, it will downshift multiple gears at once (I don't think I ever saw the standard flash downshift more than one gear at a time in D2 before). When coming to a stop, it seems to downshift more frequently instead of waiting until you are stopped. Some of these behaviors might have been present before in D3, but I don't remember any of them in D2 before. All in all, I'm happy with it so far and would recommend it to anyone. Alex@Alpine is a great guy, very helpful and efficient. |
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03-15-2017, 02:27 PM | #50 |
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I know that this is little off-topic. I am happy with the VF-Engineering DCT flash. It just works better overall.
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I apologize for spelling mistakes up front, they are a result of multitasking.
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03-15-2017, 05:20 PM | #51 |
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05-16-2017, 09:11 AM | #53 |
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I first tried this flash last October, and like some of you here, I also didn't feel much of a difference. My main goal with the DCT flash was the increased clamping force (I guess we all assume it comes with it), but there were some small things I didn't like about the DCT that I was hoping the GTS flash would take care of. However, in terms of daily drivability I didn't feel any improvement.
Two weeks ago however I was working with proTUNING Freaks to integrate the latest GTS TCU changes into the BM3 DCT flash just to try it out and see if I notice any of the improvements many of you are talking about. After driving for about 2 weeks and giving the DCT time to adapt I'm pretty happy with the update. Creeping/slowly accelerating from a stop in first gear is much smoother now (driving in S2), as it used to be jerky and quite rough before. Shifting in S2 is much smoother in general, particularly downshifts. I used to feel the DCT very clunky, particularly in the second to first gear downshifts. Upshifts also seem more seamless now. Lastly, contrary to what you'd expect from a GTS flash (I personally assumed it would be all about performance), but the car drives much more "efficient" in D1. Besides shifting smoother, it also shifts much sooner than before and doesn't hold the gears as long as before. I guess that will save a few trees in the long run for you tree huggers :P Last edited by BuLoOoSki; 05-16-2017 at 11:01 AM.. |
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05-17-2017, 09:52 PM | #54 |
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I agree with everyone above regarding "smoother shifts on daily driving" comments, but am I the only person feel GTS TCU flash shifts a tad bit slower than stock during track driving? I also experienced a few miss-shifts with GTS TCU flash on track which I had never experienced with stock dct.
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05-18-2017, 12:43 AM | #55 | |
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05-18-2017, 09:21 PM | #56 |
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Maybe I have yet made myself clear on the statement. What I meant was the DCT reacted slower when I pushed the up/down shift paddles on track after GTS TCU flash.
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05-19-2017, 06:21 AM | #57 | |
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Does your DCT do this all of the time or, for example, only after ~20+ min of track time? Which DCT setting do you use on track? I do know the e92 M3 DCT paddle pull-to-gear shift time starts to lag as the DCT temp rises on track. An aftermarket DCT cooler addresses this lag issue on the e9x M3; however, I'm unaware of any f8x M3/4 DCT on-track cooling issues. |
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05-19-2017, 07:57 AM | #58 |
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I understood what you said but what I was saying is whether you feel it slower, or others who feel it faster, it just boggles my mind. Because IF those updated softwares do in fact have an affect on shifting speeds, we are talking milliseconds. To me, that is an undetectable difference. So what I'm suggesting is that its all placebo.
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05-19-2017, 11:38 AM | #59 | |
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Goes into reverse faster Very aggressive downshifts with overrun burbles. (Stock only had 1 aggressive downshift from 3-2 with a burble) the GTS has 3-4 downshifts with a overrun burble on each downshift. The GTS always keeps the DCT in the right gear. Before there was always a delay in the DCT downshift if you were slowing down and then stepped on the gas all of a sudden. Now, it has already downshifted and the car immediately accelerates. The rear diff is a big improvement as well. At stock coming into a curve, as you start to accelerate at the apex the car always seems like the back end was about to let loose, kinda squirly. Now you can feel the car dig in and feels like you're being sling shot out of the curve. It definitely instills more driving confidence. Plus my traction control light doesn't come on near as much as it did stock.
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05-19-2017, 01:26 PM | #60 |
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I swear, this software update placebo (SUP) is like a highly contagious virus, now I can't resist anymore and will flash GTS DCT on my M4 again! Having done it last year, tracked with it, and drove normal with it, not noticing anything different... well except Esys showed me I had GTS DCT software : (i drove for few months last year until dealer updated my Istep and never bothered flashing it again...)
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05-19-2017, 05:46 PM | #61 | |
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So what I'm saying is you might have tried one of the earlier versions like I did which didn't have noticeable differences in daily driving. Worse case you can just revert, I'm sure it won't take you more than a few minutes
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2007 BMW E92 335i (SOLD): BMS JB4 / Quaife LSD / Riss Racing DPs / Helix Intercooler / BMS Intake / STETT Charge Pipe / Forge DVs Last edited by BuLoOoSki; 05-19-2017 at 05:53 PM.. |
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05-19-2017, 06:49 PM | #62 | |
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Indeed I tried the first one mid last year, where few were raving about the improvements... just like now... so many opinions but very few facts. I believe, and I made this point last year, that for the same Istep, whatever common improvements/bug fixes are introduced to all DCT software. (Maybe PTF can show us a diff ) PS: I am lazy to flash back and forth, you guys have it nice, push a button and boom it's done! PPS: so which flavor ECE or US is being used ;-) Last edited by aboulfad; 05-19-2017 at 07:23 PM.. |
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05-19-2017, 07:55 PM | #63 | |
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Now whether PTF or any other tuner has the ability to see what changes the TCU updates exactly bring I cannot say, but I can say that he was able to identify a particular change in the latest software that required some changes to allow it to flash with the app But you might have a fair point that any updates or improvements could be applied to all DCT software varients (regular M, ZCP, GTS) in a particular I-STEP. So whatever improvements I'm feeling could very well be there for the regular DCT software from the same updated I-step. But still there is the benefit of increased clamping force that you get with the GTS flash that for us with modified cars is a plus.
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2007 BMW E92 335i (SOLD): BMS JB4 / Quaife LSD / Riss Racing DPs / Helix Intercooler / BMS Intake / STETT Charge Pipe / Forge DVs Last edited by BuLoOoSki; 05-19-2017 at 08:06 PM.. |
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05-19-2017, 08:12 PM | #64 | |
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PS: ok I flashed this morning 38C2_000_048_002 using Esys on my DCT, I'll observe and report in few days. Last edited by aboulfad; 05-20-2017 at 08:47 AM.. |
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05-21-2017, 05:28 PM | #65 |
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Where are you finding a 'updated' flash at? When I log into bootmod3 I see version 1.0. Is that different from what I had installed 8 months ago?
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