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      08-31-2019, 06:49 PM   #1
kern417
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B58 Log Review Thread

I enjoy reading logs and understanding how our cars work, so I thought I'd make a thread where the community can submit logs for feedback. We don't need to lock it down to one tuner since the engine parameters are pretty universal, as long as you have data that you can share on here through your platform, datazap, google sheets, etc. I also want to track baseline parameters so people know what to expect from their tune. The more submissions we get, the more info will be publicly available.

Recommended Logging Method:
1. Shift to the appropriate gear (8AT Users: Use 4th, 5th, or 6th Gear; 6MT Users: Use 3rd or 4th Gear)
2. Start at 2000-2500rpm
3. Floor it (8AT Users: Don't press the kickdown under the pedal)
4. Stop at 6500-7000rpm

Recommended Logging Parameters:
Throttle Angle
Engine Speed
Boost Pressure (Requested)
Boost Pressure (Actual)
AFR/Lambda (Requested)
AFR/Lambda (Actual)
Ignition Timing (Requested)
Ignition Timing #1 (Actual)
Ignition Timing #2 (Actual)
Ignition Timing #3 (Actual)
Ignition Timing #4 (Actual)
Ignition Timing #5 (Actual)
Ignition Timing #6 (Actual)
Knock Detected

Things to look for
Boost more than +/- 2PSI from target
More than 3 timing pull
AFRs increasing from target
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As long as 3-pedals are an option, I will exercise my right to suffer the handicap and indignity of slower shifts and reaction times.
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      08-31-2019, 06:50 PM   #2
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91/95ron
93/98ron
95/102ron
Tune Baseline Info - Data provided at 6500rpm at WOT

OEM

Stock
Boost: 10.5 PSI
AFR: 14.0
Timing: 17.5 Advance


MPPSK
Boost: 14 PSI
AFR: 12.74
Timing: 8.5 Advance



Bootmod3

Stage 1 91oct/95ron v2.0
TBD

Stage 1 93oct/98ron v2.0
Boost: 16.5 PSI
AFR: 12.7
Timing: 12 Advance


Stage 1 E30 v2.0
Boost: 16.5 PSI
AFR: 12.7
Timing: 15 Advance


Stage 2 91oct/95ron v2.0
TBD

Stage 2 93oct/95ron v2.0
Boost: 16.5 PSI
AFR: 12.6
Timing: 12.5 Advance


Stage 2 E30 v2.0
Boost: 16.5 PSI
AFR: 12.84
Timing: 14.5 Advance



MHD

Stage 1 91oct/95ron
Boost: 16.5 PSI
AFR: 12.5
Timing: 12.5 Advance


Stage 1 93oct/98ron
TBD

Stage 2 91oct/95ron
TBD

Stage 2 93oct/98ron
TBD

Stage 2 95oct/102ron v3.0
Boost: 18.8PSI
AFR: 12.5
Timing: 16.5 Advance
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Originally Posted by umizoomi View Post
As long as 3-pedals are an option, I will exercise my right to suffer the handicap and indignity of slower shifts and reaction times.
Instagram @kern417

Last edited by kern417; 11-09-2019 at 03:00 PM..
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      08-31-2019, 10:28 PM   #3
2013mingrey335i
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This is an awesome idea ! Thanks for starting it

How do you like the tune you have?
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      09-01-2019, 02:35 AM   #4
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Quote:
Originally Posted by 2013mingrey335i View Post
This is an awesome idea ! Thanks for starting it

How do you like the tune you have?
I am running bootmod3 stage 1 and i like it so far. I switched to the OTS e30 map and realized I was starting from scratch again, so that + my general curiosity kicked off the idea for this thread. I have to run some logs to see what the differences are from the 93 map I was running originally. But it would ve nice to know what to expect without running logs on the street.
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As long as 3-pedals are an option, I will exercise my right to suffer the handicap and indignity of slower shifts and reaction times.
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      09-01-2019, 09:30 AM   #5
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@kern417, what do you mean here?

"3. Floor it (8AT Users: Don't press the kickdown under the pedal)"

Are you referring to simply running in manual shift mode?
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      09-02-2019, 12:55 AM   #6
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Quote:
Originally Posted by j1980mac View Post
@kern417, what do you mean here?

"3. Floor it (8AT Users: Don't press the kickdown under the pedal)"

Are you referring to simply running in manual shift mode?

yup pretty much.

so go to m4 2500 rpm press gas pedal all the way down just before it clicks so it dosent downshift into second on its own.


unless you have xhp then you can disable kickdown
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      09-02-2019, 05:11 AM   #7
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If your in sports+ Kickdown is disabled
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      09-02-2019, 05:53 AM   #8
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Quote:
Originally Posted by fb58 View Post
yup pretty much.

so go to m4 2500 rpm press gas pedal all the way down just before it clicks so it dosent downshift into second on its own.


unless you have xhp then you can disable kickdown
Yep, I'm specifically referring to the "click." If you floor it, you can feel a second click underneath the pedal depending on how far you push down. That's the kickdown switch, and is the difference between accelerating in gear vs. the car down shifting for fastest acceleration. If you hit the kickdown switch, the car may downshift to 3rd/2nd. You want it to stay in the same gear for the whole pull.
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As long as 3-pedals are an option, I will exercise my right to suffer the handicap and indignity of slower shifts and reaction times.
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      09-02-2019, 09:28 AM   #9
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The only experience I have with logging (previous instructions by Terry Burger) is using M4 which indeed will not trigger the kickdown.

I hang on every word at face value, so I just wanted to make sure I wasn't missing anything.
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      09-02-2019, 11:14 AM   #10
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Good idea for a thread.

At what RPM are these logs you posted below?

Quote:
Originally Posted by kern417 View Post

Stage 1 93 v2.0
16.5psi
12.7AFR
12 Timing Advance

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      09-02-2019, 11:58 AM   #11
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Quote:
Originally Posted by IMS-340MP View Post
Good idea for a thread.

At what RPM are these logs you posted below?
Redline. They all progress graduallly from 3k-7k. AFR starts in the 14s and drops as RPMs rise, and ignition timing increases as RPMs rise.

Do you think it would be more helpful to post that kind of info? Without a screenshot of a full map editor, it would be hard to illustrate, so I just posted peak values.
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As long as 3-pedals are an option, I will exercise my right to suffer the handicap and indignity of slower shifts and reaction times.
Instagram @kern417
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      09-02-2019, 12:58 PM   #12
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Yes definitely let's stick to a certain RPM close to redline like 6500 ?

Quote:
Originally Posted by kern417 View Post
Redline. They all progress graduallly from 3k-7k. AFR starts in the 14s and drops as RPMs rise, and ignition timing increases as RPMs rise.

Do you think it would be more helpful to post that kind of info? Without a screenshot of a full map editor, it would be hard to illustrate, so I just posted peak values.
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      09-02-2019, 02:03 PM   #13
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Here's mine at 6500 RPM

Car: 340i MPPSK, no other mods.
Fuel used: less than 91 Octane
Ambient Temp: 100F

Manifold Temp: 110F
Boost: 14 PSI
AFR: 12.74
Timing: 8.5 degrees
Knock Delta: -0.1

Low Octane effecting timing badly.
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      09-02-2019, 03:12 PM   #14
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Quote:
Originally Posted by IMS-340MP View Post
Here's mine at 6500 RPM

Car: 340i MPPSK, no other mods.
Fuel used: less than 91 Octane
Ambient Temp: 100F

Manifold Temp: 110F
Boost: 14 PSI
AFR: 12.74
Timing: 8.5 degrees
Knock Delta: -0.1

Low Octane effecting timing badly.
Awesome, I'll add that. Please post logs as well if you have any
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Originally Posted by umizoomi View Post
As long as 3-pedals are an option, I will exercise my right to suffer the handicap and indignity of slower shifts and reaction times.
Instagram @kern417
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      09-02-2019, 03:49 PM   #15
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You guys should add what gear you are providing log info for, 3rd vs 4th will show different values at the same rpm.
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      09-02-2019, 04:17 PM   #16
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Quote:
Originally Posted by GT500R View Post
You guys should add what gear you are providing log info for, 3rd vs 4th will show different values at the same rpm.
Why would it? I want to focus on peak values but can add more detail across the rev range if it makes sense. But I don't have any differences between logging in 3rd gear and 4th gear other than the amount of time/data points across the log.
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Originally Posted by umizoomi View Post
As long as 3-pedals are an option, I will exercise my right to suffer the handicap and indignity of slower shifts and reaction times.
Instagram @kern417
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      09-02-2019, 04:19 PM   #17
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4th gear is recommended with DSC off.

Quote:
Originally Posted by GT500R View Post
You guys should add what gear you are providing log info for, 3rd vs 4th will show different values at the same rpm.
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      09-02-2019, 04:25 PM   #18
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I guess engine load is different in each gear ? MHD recommend 4th gear with DSC off.

Quote:
Originally Posted by kern417 View Post
Why would it? I want to focus on peak values but can add more detail across the rev range if it makes sense. But I don't have any differences between logging in 3rd gear and 4th gear other than the amount of time/data points across the log.
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      09-02-2019, 04:54 PM   #19
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Quote:
Originally Posted by kern417 View Post
Why would it? I want to focus on peak values but can add more detail across the rev range if it makes sense. But I don't have any differences between logging in 3rd gear and 4th gear other than the amount of time/data points across the log.
Load is different and therefore so will boost or timing.
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      09-02-2019, 05:00 PM   #20
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I guess with these logs a good tuner can estimate how much power the engine produce.
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      09-03-2019, 05:48 AM   #21
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mine at 6500 RPM :

Car: 340xi, software tune by me only.
Fuel used: 98RON.
Ambient Temp: 20 degrees of Celcius
IAT : 32 degrees of Celcius
Boost: 17.7 PSI
AFR: 12.6
Timing: 7.8 degrees

I would recommend to upload data from 6000-6300rpm range as most B58's make max power there.
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      09-03-2019, 06:13 AM   #22
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Not doubting your comments but most b58s dynos I saw power peaking around 6500 RPM

https://www.google.com/search?q=b58+...ih=945#imgrc=_

Also your timing advance is quite low I guess with a bit less boost or higher octane you will get better timing and more power.

That's what happened to me when I increased the boost timing retarded which resulted to lower top end power.

I learned that more boost not always equal more power, Ignition timing is the key, If we don't get a good combustion then the extra boost is useless.

Also how do you make your own tune ? I wish I could do that.

Quote:
Originally Posted by enemigo13 View Post
mine at 6500 RPM :

Car: 340xi, software tune by me only.
Fuel used: 98RON.
Ambient Temp: 20 degrees of Celcius
IAT : 32 degrees of Celcius
Boost: 17.7 PSI
AFR: 12.6
Timing: 7.8 degrees

I would recommend to upload data from 6000-6300rpm range as most B58's make max power there.

Last edited by IMS-340MP; 09-03-2019 at 06:23 AM..
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