01-11-2021, 04:05 PM | #265 | |
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There was some posts above however where someone did need to go to a lower E%, so its worth experimenting with to see what your specific car/setup likes the most. |
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01-12-2021, 07:41 AM | #266 | |
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edit: oh, i see you said the same thing above.
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01-12-2021, 11:00 AM | #267 | |
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Every follow up since with me and other folks he’s said what you and Jeremy are saying, there’s room for more ethanol if the HPFP will support it. And this comment has been given to guys running half 93/half E85 (or E40-47, depending on E85 quality). |
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01-13-2021, 01:11 PM | #268 |
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sharing my log of running the stage 2+ race gas tune with the following:
m235i rwd 6mt upgraded clutch (550i clutch) stock hpfp WMI at 50/50 (snow nozzle #5) ~91 octane fuel (advertised as 93 octane..) high flow cat https://www.bootmod3.net/log?id=5ffe...729b6b2524d564 previously on the stock clutch i was running this tune with the 10% boost reduction because of clutch slip. feedback welcome. wondering if catless dp and/or larger turbo inlet would yield better results. im also considering switching to a chargepipe with 2 smaller nozzles for the wmi to help with timing.
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Last edited by designatedposter; 01-13-2021 at 01:20 PM.. |
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01-13-2021, 02:21 PM | #269 | |
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Looks pretty good overall. you do have a small dip in HPFP pressure at the beginning but nothing major. Cyl 1 also has quite a bit of timing corrections, maybe due to less WMI reaching that cylinder? What cat are you running? Your boost control doesnt really look worse than people running catless from what i remember, nor does WGDC. A good inlet might save you a few % WGDC. You also have a throttle closure at the beginning but it looks like its just to get boost under control. You don't have lambda target in the log so can't say whether or not the fuel trims are having difficulty keeping that under control. As expected you have huge STFT corrections due to the meth. |
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01-14-2021, 03:45 PM | #270 |
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A bit more meth might help the timing and if hpfp is crashing as you mentioned. 2 nozzles will help with distribution but I wouldn't go smaller than 2 5s for the level of boost this map is running.
I run a single #10 nozzle with 70% meth and 22psi with clean timing. Last edited by 435gc; 01-15-2021 at 08:40 AM.. |
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01-14-2021, 03:50 PM | #271 | |
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His fuel trims are already very negative and given that other cylinder timing looks good i would be weary of spraying more. The small dip in HPFP isnt enough to worry about, i get those dips occasionally (running E30 on MHD stage 2+ E20 map, stock HPFP), and they arent even enough to impact fuel trims or anything. I would say get 2 more 4th gear pulls and see what things look like and go from there. |
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01-15-2021, 09:06 AM | #272 | ||
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who makes your #10 nozzle? it's hard to compare between brands since they all measure flow at different pressures. Quote:
i've tried swapping plugs and coils, no change. also, i've got 6mt, so i don't do 4th gear pulls haha. 3rd is plenty fast enough.
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01-15-2021, 12:24 PM | #273 | |
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Gotcha, and yeah didn't check what gear was in the logs but 3rd is fine for 6MT. |
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01-16-2021, 11:30 AM | #274 |
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I use the nozzles from Burger.
Mine is also placed at the distal end of the charge pipe right by the intercooler. Maybe adding a bit of ethanol might help if adding in more meth to help with negative trims? Or may negate the need for more meth if you are upping the meth just for more octane. Last edited by 435gc; 01-16-2021 at 11:45 AM.. |
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01-16-2021, 03:39 PM | #275 | |
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01-16-2021, 11:31 PM | #276 |
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Maybe not the right thread to ask this, but it has been brought up here.
What exactly is the problem with fuel trims being either positive or negative? I am admittedly ignorant here, but so long as trims aren't pegged at full pos or full neg, does that not mean that the system is working the way it should? Obviously, to have a set-up with zero outlying numbers is what all type A personalities(bimmer heads) seek. But I wonder if chasing fuel trims with no adaptation is the same as seeking ignition timing that is 100% perfect 100% of the time? I don't know, seeking knowledge. Last edited by 435gc; 01-17-2021 at 02:02 AM.. |
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01-18-2021, 02:05 PM | #277 | |
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There's no problem with fuel trims being positive or negative, and as you alluded to, its completely normal to have some corrections. To be clear, i was in no way implying in the posts above that having fuel corrections is bad or an issue. Generally speaking, I consider less than +/- 10% to be totally reasonable. But, if you are getting more corrections than that while running the fuel called for on your specific tune, it be a sign that you have some sort of underlying issue, so its just something to watch out for. You could have a fuel system issue (HPFP crash, injector problem, etc), a MAF/MAP issue (air flow or boost not read correctly to calculate fuel needed), a O2 sensor issue (AFRs not read correctly), etc, because realsitically the tune shouldnt be that far off that a significant amount of corrections are required. Again, this is assuming you are running the appropriate fuel for your tune - so no extra ethanol, no meth spray, etc. Also, i would be a little bit more worried about highly positive fuel trims than negative ones, because that implies the car is running lean and adding fuel reactively, so there are at least brief periods of time where the car is leaner than it should be (most concerning under WOT/high boost situations). Going back to his logs as an example, his fuel trims get all the way down to -26%. Again, this isnt a problem in itself assuming the DME can keep the AFRs in check. I forgot what the max trim is (30 or 33% i believe), but hes geting pretty close to that. So spraying more meth (either in overall WMI quantity or meth% with same WMI quantity) might push the trims all the way down to be maxxed in which case the car will not maintain target lambda. A lot of tuners recommend against spraying WMI on a tune that isnt designed for it because the fuel trims are reactive, so in the opposite sense of the example i gave above, there are going to be times when the car is running much richer than it should. How much richer is directly proportional to how negative the fuel trim becomes. So think about it this way - if you have only small fuel trims, that means the car is running only a little rich or a little lean before the DME can correct. No big deal, right? But, if you have large fuel trims, the car is running a lot more rich or lean before the DME can correct. Hence, larger fuel trims can be a little more concerning, even if having negative or positive trims is not necessarily a "problem". |
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01-20-2021, 11:39 AM | #278 | ||
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How's this looking my guy? This was the third of three back to back to back logs. Timing gets a lot better due to lower IATs. Also, now that i have the ethanol sensor installed and finding my 93 is E10, im almost certain my E% the last time around was way higher than E30 and still the log looked pretty bad. Must have been the heat soak. Its a third gear i know, but i had been doing 3rd gears all day for Carey and it just slipped my mind. Edit: The mix was E30 |
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01-20-2021, 12:43 PM | #279 | |
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I am assuming you have a HPFP? You have a small dip in HPFP pretty but nothing significant, just a little more than usual for those running an upgraded HPFP. You also have a throttle closure at the beginning of the pull when you start to overboost too much. I wouldnt worry about those last 3 things. WGDC looks where it should be. |
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01-20-2021, 07:23 PM | #280 |
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Hey guys, designatedposter spotted some updates to the OTS maps today. It looks like a global update that includes:
-Improved drivability -6MT gearshift load drop fix -Changes to AFR at redline -Load changes at high IAT While this should make the 6MT guys happy, this sounds like a proactive way to address stock turbo/IAT concerns about the upcoming Stg 2+ 93 OTS, not to mention all the other OTS maps for anyone without adequate IAT control. |
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01-20-2021, 07:50 PM | #281 | |
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01-20-2021, 08:11 PM | #282 | |
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2016 340i xDrive - BM3 Stage 2 93 OTS - xHP Transmission Tune Stage 2 - B58TU HPFP - Bilstein B14 - VRSF Catless DP - Kyostar CAI
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01-20-2021, 08:20 PM | #283 |
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01-20-2021, 08:23 PM | #284 |
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It's weird because they say "released 2021-01-19" but the maps haven't changed.
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01-20-2021, 09:49 PM | #285 | |
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Please give us first impressions of the updates
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01-21-2021, 10:54 AM | #286 | |
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Still running my stock turbo.
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2014 6MT 435i BM3 Stage 2 E30+ - ERW Chargepipe, CTS Turbo Intake, WAGNER EVO COMP II FMIC, CTS Turbo DP, AWE Performance midpipe & Axleback, Gapped NGK plugs, SPEC Stage 2+ clutch upgrade, DORCH stage 2 HPFP.
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