09-16-2017, 11:27 PM | #23 | |
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09-16-2017, 11:42 PM | #24 |
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09-16-2017, 11:44 PM | #25 |
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09-16-2017, 11:49 PM | #26 |
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Sounds like a tuning issue. Not sure how much the computers adapt when you were running meth. But injecting meth us richening up the tune. Maybe the computer adapted and commanded less fuel. Then you went off meth and the tune is off. Nevertheless, do not beat on the car. Get the tune figured out.
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09-16-2017, 11:53 PM | #27 | |
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If anyone wants to give me any other ideas of things I should check, please let me know. Regarding adaptability, I NEVER run meth. I had it running maybe a month ago, but it is ALWAYS off. So technically It should be adapting to non-meth usage. |
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09-17-2017, 12:27 AM | #28 |
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If you've ruled out any hardware issues, then you should look at the tune, and I agree with badgtr, don't drive it for now. Yes you can adjust AFR via flash tune; Alex leaned out my AF a tad the other day.
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09-17-2017, 02:31 AM | #29 |
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I would not drive that car in boost until this is resolved. If wastegate duty cycle is 99%, then it's not making the boost the ECU is targeting. How much boost is it actually making?
This still should not make the air fuels dangerously lean. Go back to stock and go from there. Hard to look at log on phone - but it should have RPM logged - doesn't look like it from the quick look I took.
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09-17-2017, 08:14 AM | #30 | |
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There is a column called "boost actual" and peak is a value of 2440 at 6100 rpm. I would very much appreciate your input once you have a larger screen to view values in log. Tuner company got back to me last night and sent me a different tune in order to monitor how car responds to this different version. Depending on those results he told me he will update firmware on my car to latest version considering the firmware its currently on has some glitches (might be thr first version from bmw). Will keep you guys posted. Do you guys think i should go back to oem chargepipes? Keep the feedback coming! |
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09-17-2017, 10:50 AM | #31 |
F10 1/4 WR: 9.9s / 142.5mph 1/2 WR: 175.5mph
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A dyno isn't a log - get a JB4 or INPA and log everything. RPM, targets, actual, fuel trims, fuel pressure, timing, etc etc
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09-17-2017, 12:35 PM | #32 |
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I've been using an OBDlink MX Bluetooth OBD2 module with Android app Torque pro to log IAT, boost pressure, RPM, speed. It can also log timing, fuel trims, fuel pressure, etc. Probably not as comprehensive as a JB4, but it does log in realtime.
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09-17-2017, 02:49 PM | #33 | |
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This is the kind of CSV I get with the datalog |
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09-17-2017, 02:51 PM | #34 | |
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09-17-2017, 02:52 PM | #35 |
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So I just flashed the car with new tune to see how the car reacts and will send tuner logs tonight once I do maybe 2-3 pulls from Third Gear.
Will report back. |
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09-17-2017, 03:23 PM | #36 |
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lol, g, i wonder whose tune this is lmao
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09-17-2017, 04:51 PM | #37 |
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Doesn't appear we're going to find out.
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09-18-2017, 09:33 AM | #40 |
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Thanks guys, Im flashing back to stock today and see how the car performs. I will do a few pulls and create a log to see how the car is doing. will report back.
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09-18-2017, 07:17 PM | #42 |
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Yeah, was thinking the same thing.
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09-19-2017, 07:47 PM | #43 |
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I would consult with your tuner and follow their advice. Would not drive the car in boost as I said before. Log with a bone stock file and send it to me - I'm happy to take a look. You should see the Wastegate duty cycle drop into the 50's with the stock tune if everything is working properly in terms of the turbos/wastegate. Lean under boost like that is a recipe for disaster.
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09-19-2017, 07:50 PM | #44 | |
F10 1/4 WR: 9.9s / 142.5mph 1/2 WR: 175.5mph
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