10-07-2020, 08:07 AM | #23 | |
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Re-post from 2015 to get an idea but we all know the car cant go that fast..... https://f80.bimmerpost.com/forums/sh....php?t=1202690 DCT @ 7600rpm 1st = 35mph 2nd = 65mph 3rd = 99mph 4th = 132mph 5th=168mph (167mph - U.S. cars stop speed governor BUT given speedo it's not 100% accurate, any guesses on "real" speed?) 6th=199mph (189mph - stock top speed drag limited BUT given speedo it's not 100% accurate, any guesses on "real" speed?)7th = 251mph |
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10-07-2020, 08:19 AM | #24 |
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This happens to me in 3rd-7th WOT down low between around 2-3.5k RPM I think. It happens if I upshift and am WOT and the RPMs land in that range or if I roll into in that range from that gear. I believe the OP said this is what he was experiencing too. I don't think it ever happens in 1st or 2nd since the car gears through that RPM range so fast in those gears. If I'm above that rev range it doesn't happen.
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10-07-2020, 11:04 AM | #25 | |
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10-07-2020, 01:01 PM | #26 | |||
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Don't know about others, but my speedometer is 2 mph above GPS at highway speed, and 2-3~ mph higher than GPS at autobahn speeds. I did a 182 mph run a couple years ago and the GPS both on my phone and dashcam fluttered between 179 and 180 mph. Our speedos are scary accurate. Stock the limiter would engage at 166 mph indicated 163 mph GPS. Actual top speed without a limiter is around 195 mph drag limited. You have to remember autobahns are not totally flat, plus that old video could've been shot when it was extremely hot out, who knows? I saw an old video of a stock comp pack in South Korea hitting 318 km/h. And Stage 1 is 100~ whp more. Quote:
v9.1 was supposed to fix this supposed surge. Guess it didn't. And they haven't updated the map in over a year.... Quote:
Last edited by TanzaniteBlue; 10-07-2020 at 01:54 PM.. |
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10-07-2020, 07:47 PM | #27 |
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OK. Here is a video, logs, and picture of the logs.
This is Stage 1 - 91 ACN. I have stock downpipes, AWE switchpath exhaust from downpipes back, and MSR intakes. I've had a few little issues with this map since updated from the GTS map from 2017. But this is one of the issues I had with the old map and have with this map. Other things are GTS roar start up not working, and burbles randomly turning themselves off. I don't think neither of the latter two are related. If this is surge (I'm ignorant to this stuff), is it harmful for the engine? Or just loss of power in that range and conditions? Link to Log: https://www.bootmod3.net/log?id=5f7e...729b53afaf8447 Here is Video and Logs. You can clearly hear the flutter. |
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10-07-2020, 08:37 PM | #28 |
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Hmmm that actually sounds completely different than the flutter I am talking about. Mine is more of a choppy intake sucking sounds during throttle in specific gears. I’ll see if I can get a video.
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10-07-2020, 09:07 PM | #29 | |
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Pretty much describes my issue too but it doesn’t come through on video I’ve tried a couple times. It’s also a constant pattern that never changes. |
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10-07-2020, 11:33 PM | #31 |
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10-08-2020, 11:34 AM | #32 |
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So upon driving my car and really concentrating on the issue, I think what I am experiencing is fairly normal. It only happens in sport plus and at very partial throttle around maybe 10% to 20% throttle where the car is thinking should it give full boost or not. When I actually go wide-open throttle, the induction noise is continuous and sucks very hard. If you listen closely to my video you can hear the induction sound from the intake and that slight choppy sucking sound. |
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10-08-2020, 11:39 AM | #33 | |
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10-08-2020, 11:49 AM | #34 | |
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10-08-2020, 12:00 PM | #35 |
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I just contacted customer support to confirm so I’ll let you guys know what they say. I sent them a video as well
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10-08-2020, 12:56 PM | #36 | |
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10-08-2020, 01:08 PM | #37 | |
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10-08-2020, 04:17 PM | #38 | ||
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10-08-2020, 04:52 PM | #39 | |
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This does not occur for me on the stock map with the intakes. So it's something with the map, probably from the increased boost across the entire rev range. |
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10-08-2020, 06:39 PM | #40 | |
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There is 100% something wrong with v9.1 bm3 maps concerning this issue. It does not occur otherwise. |
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10-08-2020, 07:15 PM | #41 | |
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Just letting you guys know that I had this same issue when I had VRSF open intakes a year ago and then now with the SSR intakes. Since intakes are just noise makers, I’ll probably just reinstall my stock intakes. |
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10-09-2020, 05:56 PM | #42 |
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10-10-2020, 12:12 AM | #43 |
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10-10-2020, 07:40 AM | #44 | |
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