04-05-2019, 08:49 PM | #222 |
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Just flashed stg1 93. Something isn't right. It surges. Wot 3rd gear, it hits real hard, cuts back, builds back up, cuts back .. repeat 4 or 5 times all the way to redline. Any thoughts? Car ran perfect on stock map. Only engine mod is bms intake. I am always in DSC off mode.
Last edited by B58 parts; 04-05-2019 at 08:56 PM.. |
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04-05-2019, 08:53 PM | #223 | |
Bmw340i Mppsk, bm3 tune,vrsf downpipe dinan intake
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04-05-2019, 08:56 PM | #224 | ||
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04-05-2019, 09:04 PM | #225 | |
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04-05-2019, 09:21 PM | #226 |
Bmw340i Mppsk, bm3 tune,vrsf downpipe dinan intake
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04-05-2019, 09:22 PM | #227 |
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04-05-2019, 09:26 PM | #228 | |
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Do you have MPPSK and not have this issue after flash? Bc normally on stock MPPSK car is loud on start up bc cold start, but then settles in after a min or so with valves closed. If I switch to sport it stays closed until you throttle is applied, at which point you hear it actuate. If you switch back to comfort you hear valves actuate right away |
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04-05-2019, 09:30 PM | #229 | |
Bmw340i Mppsk, bm3 tune,vrsf downpipe dinan intake
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04-05-2019, 09:36 PM | #230 | ||
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04-05-2019, 09:52 PM | #231 |
Bmw340i Mppsk, bm3 tune,vrsf downpipe dinan intake
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04-05-2019, 09:56 PM | #232 | |||
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04-05-2019, 10:07 PM | #233 | |
Bmw340i Mppsk, bm3 tune,vrsf downpipe dinan intake
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04-05-2019, 10:28 PM | #234 |
Bmw340i Mppsk, bm3 tune,vrsf downpipe dinan intake
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04-05-2019, 11:07 PM | #235 |
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Supply and demand isn't rocket science. When you're the only game in town (well....as of last summer anyway), you can charge whatever you want. It's no coincidence the new Mission group buy price commenced the same day PTF dropped. You'll soon see Mission's price permanently drop to a price point right in line with the rest.
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04-05-2019, 11:10 PM | #236 | |
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Car is a manual in dsc off mode so i don't know why else it would be cutting. I tried sport+ and it did the same. Plugs are new OEM everything else really seems fine. I guess I will try reset adaptations and get the logs .. I assumed flashing the entire module like that would reset them but apparently not. Last edited by B58 parts; 04-05-2019 at 11:16 PM.. |
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04-06-2019, 12:25 AM | #237 | ||||
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04-06-2019, 12:41 AM | #238 | |
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04-06-2019, 01:24 AM | #239 |
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Drives: BMW 330e F30 M-sport
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Those with problems should probably post a datalog to support to get a good answer
And for reference to a number of other questions in this thread, here's the manual - it's quite good https://bootmod3.atlassian.net/wiki/...d3+User+Manual
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04-06-2019, 01:57 AM | #240 |
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I have a stock 340i xdrive with 48k miles. I am planning to get BM3 and use the stage1 91 octaine map. This will be the first time I am tuning a BMW and need your help.
My questions are: 1.How does it impact the life of the engine and Turbo if I keep it at Stage 1? 2 . Is it true that if I install a DP and use the related map it would extend the life of the Turbo (a safer tune)? 3. For the safest tune and power increase, what would be your recommendation? (Except for leaving it stock) Thanks, |
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04-06-2019, 04:28 AM | #241 | |
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I've even heard that decat helps thermal management of the turbo by allowing the hot gasses to pass freely. This second part is especially hilarious to those in the know. The above idea is completely flawed. It's what happens when untrained people try to make logic out of complex science. Reality: It is common for OEM turbo installations to have a physical turbo exit restriction. This helps the wastegate control boost pressures as it softens the ability of the turbo to overspeed in high flow conditions. It can also help with turbine surge, but that is another subject. This restriction limits the volume flow of gas that can pass through the turbo and therefore the turbine speed. In the case of the B58, that restriction appears to be the cat. Remove the cat and you place all the effort of controlling turbine speed on the wastegate alone. Now whilst that is the WG's job, it will be tuned in standard form to react to stock system requirements, this includes PWM of the control signal. Remove the physical flow control device 'the cat' and you are almost certainly going to experience spikes of overboost and turbine overspeed that the WG just cannot react to in the time it happens. That in no way makes it 'easier for the turbo'. Conclusion: removing the cat places higher strain on the turbo. Period. |
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04-06-2019, 05:06 AM | #242 | ||||
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Thank you for your great reply. I appreciate it . In this case do you recommend simple Stage 1 tuning? I am not looking for crazy power increase. |
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