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Boosted_8 Boosted_8 is offline
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Question M550i LCI - Log request - 04-19-2021, 11:22 AM

Hello there.
Long story short: A few 2021 M550i owners have started to notice the 1st and 2nd gear pull is lower than expected with the 0-60 times slower than the previous pre-LCI model. Full power comes in from 3rd and above. If any 2021 model year owners are running a JB4 it would be interesting to see :-

a) If you can hit the manufacturer claimed 3.6-3.8 second 0-60 times
b) If the Jb4 log from such event shows the actual boost in each gear, the throttle plate position and the wastegate duty.

Massive thanks for anyone that has this data they can share!
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Default 04-19-2021, 12:35 PM

If the weather clears up, I'll try to get a Dragy run in. It certainly doesn't feel like a 3.x second to 60, but it could be. I've been saying since day 1 that the throttle is dead.


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Default 04-19-2021, 01:16 PM

Attached is my data post run in period. The 0-30 is really terrible. It's not all bad news as the 100-200kmph data is impressive, the 600bhp Audi RS6 does this in 8.7-8.8 and the f90 M5 (non comp) in 7.7 seconds for perspective
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Default 04-20-2021, 06:47 PM

I can’t get the dang thing to launch right. All my runs are over 5 seconds. It’s like it won’t go WoT off the line. If you baby it off the line and then go WOT it feels quicker.


Mike Levy
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Boosted_8 Boosted_8 is offline
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Default 04-21-2021, 04:45 AM

Sport plus, gear selector in m/s and one tap on traction. Both feet hard on the pedals, click the kick down button. Chequered flag shows on dash. Release the brake.
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Default 04-21-2021, 06:24 AM

One tap on traction? There’s the problem. On my 335 I had to hold the button down to fully disable.

EDIT: Just checked. Have to hold it down to fully disable in this car too. Just a tap puts it in Dynamic mode. Is that what we want?


Mike Levy
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Last edited by Mike_L; 04-21-2021 at 12:38 PM..
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Default 04-21-2021, 08:04 AM

Quote:
Originally Posted by Boosted_8
Sport plus, gear selector in m/s and one tap on traction. Both feet hard on the pedals, click the kick down button. Chequered flag shows on dash. Release the brake.
Sorry if this is a stupid question, but what is "click the kick down button"?
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Default 04-21-2021, 09:57 AM

Quote:
Originally Posted by Boosted_8
Hello there.
Long story short: A few 2021 M550i owners have started to notice the 1st and 2nd gear pull is lower than expected with the 0-60 times slower than the previous pre-LCI model. Full power comes in from 3rd and above. If any 2021 model year owners are running a JB4 it would be interesting to see :-

a) If you can hit the manufacturer claimed 3.6-3.8 second 0-60 times
b) If the Jb4 log from such event shows the actual boost in each gear, the throttle plate position and the wastegate duty.

Massive thanks for anyone that has this data they can share!
I have a JB4 that I can take logs. But I have ******* *********. So the numbers would be skewed.
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Boosted_8 Boosted_8 is offline
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Default 04-21-2021, 10:13 AM

Quote:
Originally Posted by DCFS222!
Sorry if this is a stupid question, but what is "click the kick down button"?
Push the gas pedal till you hit resistance, push a little bit harder again and you will feel the kick down trigger.
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Default 04-21-2021, 10:40 AM

Quote:
Originally Posted by Boosted_8
Push the gas pedal till you hit resistance, push a little bit harder again and you will feel the kick down trigger.

Okay gotcha. I thought I read that it's better to launch an automatic, You suggest manually up shifting.
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Default 04-21-2021, 10:56 AM

Quote:
Originally Posted by DCFS222!
Okay gotcha. I thought I read that it's better to launch an automatic, You suggest manually up shifting.
M/S leaves you in sport auto until you pull a paddle. I would leave it there personally.
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Default 04-21-2021, 11:00 AM

Quote:
Originally Posted by Boosted_8
M/S leaves you in sport auto until you pull a paddle. I would leave it there personally.
Now it makes a little bit more sense to me. M1 would be manually upshifting but if it says S1, it'll upshift itself I believe is what you're saying?
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Default 04-21-2021, 11:11 AM

Quote:
Originally Posted by DCFS222!
Now it makes a little bit more sense to me. M1 would be manually upshifting but if it says S1, it'll upshift itself I believe is what you're saying?
Ja, Das ist richtig
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Default 04-23-2021, 10:49 AM

She’s got nothing off the line. I don’t get it. I'm sure the DA and my 345lb ass doesn't help, but i was expecting better
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Last edited by Mike_L; 04-23-2021 at 11:14 AM..
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Default 04-24-2021, 04:43 AM

I smell a class action... t=1799884https://g30.bimmerpost.com/forums/sh....php?t=1799884
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Default 04-30-2021, 12:29 PM

I smell something else. A lot of bull**** coming from BMW. I really didn't want to go this route, but since they're seemingly not taking this seriously, I may have to get the Press involved.


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Default 05-07-2021, 07:06 AM

My Jb4 has arrived. Shame there are no fitting instructions for the new V8...
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Default 05-07-2021, 01:28 PM

Stupid easy. The MAPs are on the sides of the intercoolers. On the right hand side (looking at the bay), you'll have to remove the brace and airbox to unplug the connector. On the other side you can just reach in if you have thin arms or remove the box and brace for easier access. The OBD2 cable can be run into the cabin through the grommet behind the brake booster.


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Default 05-24-2021, 03:00 AM

So to confirm - Is it safe to run map 2 (94 gas here) without the EWG connectors as it seems like they wont fit the current cars? (Disappointment strike 2)
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Default 05-24-2021, 06:28 AM

Quote:
Originally Posted by Boosted_8
So to confirm - Is it safe to run map 2 (94 gas here) without the EWG connectors as it seems like they wont fit the current cars? (Disappointment strike 2)
Possibly the question is whether it would be safe to run the EWG connections even if the adapters were available to make the interface. Is there firmware etc. needed for this next level. I understand that in other applications this EWG control via JB4 makes a big difference. Looking forward to this ability.
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Default 06-05-2021, 03:48 PM

One last question. I'm not spotting an obvious way through for the ODB2 cables. Now this may be due to the fact I have a right hand drive car and all the suggestions I'm reading are about left hand drive cars routing cables. So has anyone in Australia, South Africa or Japan got any tips haha
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Default 06-11-2021, 12:58 AM

Well I got there. I would say installing a JB4 is not for a total novice with limited commitment... Here's the map one log from last night. Should I be asking Burger to validate it?
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File Type: csv P65_M1_R1_log_210610_212732.csv (6.9 KB, 59 views)
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Default 06-11-2021, 11:06 AM

Log looks pretty clean and boost is on target...I'd say you got there.



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Default 06-14-2021, 11:06 AM

Last problem it seems -> The auto error code delete doesn't seem to be working. I'm running without OPF filters. I can delete the codes with Bimmerlink just fine but JB4 doesn't seem to do it? I have enabled it via the WMI options bit:6?
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Default 07-16-2021, 11:21 AM

Boosted

did you fix deleting codes with JB4?


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