10-18-2022, 04:49 PM | #3103 |
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What fuel are you using?
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10-18-2022, 06:29 PM | #3105 |
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BM3 OTS maps
Stage 2 91 ACN pull: https://www.bootmod3.net/log?id=6349...0b43a0ea849179 Stage 2+ 93 pull: https://www.bootmod3.net/log?id=6349...0b43a0ea849158 Gas tank is full of 91 octane with 15oz of Lucas Oil octane booster. Mods: catless downpipe, TU pump
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10-19-2022, 02:30 AM | #3106 | |
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Also I am sure you are aware that BMW recommend use of (min) RON 98 with MPPSK. It is proven to work fine with less than RON95 as well, but if you want an optimal setup, you should be using min RON98. A good tip for the B58 anyway, especially if tuned (and MPPSK is in reality a BMW tune).
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10-19-2022, 03:39 AM | #3107 | |
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10-19-2022, 09:35 AM | #3108 | |
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I actually didn’t know about 98RON until two weeks ago. When a dealer installed my mppsk, they never provided me with the pamphlet that specifies 98 RON, I just saw it recently on the forums... Quality eu dealers. Thank you for the look over. I would assume that the 95RON might be the cause for the timing retardation that can be seen in both logs. Last edited by VVlasy; 10-19-2022 at 11:04 AM.. |
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10-19-2022, 10:04 AM | #3109 |
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Weird, try these links:
Stage 2+ 93 octane https://www.bootmod3.net/log?id=634c...729b4d69bc89df Stage 2 91 octane ACN https://www.bootmod3.net/log?id=6349...0b43a0ea849179
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10-19-2022, 12:23 PM | #3110 | |
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Poor timing advance, lots of timing corrections, load target is missed by a lot, wastegate is working hard.. One thing I noticed is when I switch between maps, it takes some time for the ECU to adapt. I get crappy logs and then it gets better. Maybe just drive easy for 100-200 km than try to log again. Just my 2 cents.
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10-19-2022, 12:55 PM | #3111 | |
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Here's another Stage 2+ 93 log I did as well: https://www.bootmod3.net/log?id=6349...0b43a0ea849158
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10-19-2022, 01:04 PM | #3112 | |
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I would say the risk is probably low, if you don't push the car, but honestly, I don't know mate.
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10-19-2022, 01:33 PM | #3113 | ||
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10-19-2022, 01:42 PM | #3114 | |
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I would not drive like that. Especially the first log for me (and I am no expert either) is a very clear signal that the tune (stage) and the fuel are a definitive mismatch. Why push for what's simply not there? It will not come out of nowhere. Your Stage 2 ACN91 log on the other hand looks perfectly fine to me.
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10-19-2022, 08:19 PM | #3115 | |
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10-20-2022, 01:54 PM | #3116 | |
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10-20-2022, 03:10 PM | #3117 |
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Hey guys,
Long time lurker and new to the BMW world. I've grabbed MHD on a stock 2017 340i. Been running the 93 octane stage 1 map for a few months and logs look okay. Had some timing corrections with it and added a gallon or two E85 to clear it up. However, boost pressure averages 15.5-16 during all runs with a target of 17psi. I could post a log but it looks relatively okay besides the slight boost deviation. Today I gave it a try on the stage 2 93 octane map, without a downpipe. Trying to add that extra psi or two. Pull felt great, the added psi was there. But I'm seeing timing corrections and 100% WGDC during the boost ramp (2500-3000rpm). I only have a gallon of e85 in at the moment, so I'm thinking to add another one or two to see if that clears up timing. But the full WGDC% is a bit concerning and I'm guessing that may be down to the lack of downpipe. However it's happening early in the run and boost pressure seems okay. STFT has always been all over the place for me running the gallon or two of e85 (1-10% through most WOT pulls). Would someone chime in on their thoughts? Thanks in advance! Stage 2 https://datazap.me/u/daveywave/mhd-s...49-50-56-60-62 Stage 1 https://datazap.me/u/daveywave/mhd-s...og=0&data=5-26 Last edited by doubldunce; 10-20-2022 at 03:19 PM.. Reason: added stage 1 log |
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10-20-2022, 03:38 PM | #3119 | |
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Run E30 Stage1 OTS and make sure your mix is right if you want to safely make more power. |
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10-20-2022, 06:42 PM | #3120 | |
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Thanks for the input I'm fairly new to looking at logs. I don't quite understand what exactly this means. Will contact mhd though. |
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10-22-2022, 05:13 PM | #3121 |
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MHD Stg2+ 95oct map with 93 octane gas, one shot of boostane and 3 gallons of ethanol... was having a great pull until i had to let off. wish i could have stayed in it as it was pulling hard and i would have loved to see the timing up top...boostane, thumbs up!!!
https://datazap.me/u/nat/log-1666476...35-36-37-38-42
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10-23-2022, 05:36 AM | #3122 | |
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Log looks good! But if those 3 gallons of ethanol were 100% pure ethanol, you should probably thank the ethanol more than the boostane haha edit question: how do you compare the 95oct vs the E40 map ? I'm also sometimes switching between the two. When I can't easily go get some E85, I top up my "E40 mixed" tank with 93oct to achieve around ~E25 which gives me good logs on the 95oct map (I don't have flexfuel canbus so I use the mapswitcher). I find the 95oct map to feel a bit more aggressive mid-range but overall the E40 maps seems to pull harder top end. Also I notice the first 10 seconds of driving after coldstart on 95oct map since I last switched to it the gearswitches seem a bit jerky, but that might be because there's close to E30 in the tank while running a pump gas map. |
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10-23-2022, 07:00 AM | #3123 | |
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https://datazap.me/u/nat/log-1666525...35-36-37-38-42
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10-23-2022, 07:50 AM | #3124 | |
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The ethanol map is fun and the E85 is cheap but the fuel consumption is definitely up to 20% higher on the E map. Maybe the 95oct map feels more punchy mid range because pumpgas has more energy/gets hotter faster than ethanol, but ethanol having a much higher cooling effect (and octane) is creating the smoothness and ability to remain consistent with high timing advance top end. That's just my assumption though. |
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