|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Today's Posts | Search |
|
BMW 3-Series (E90 E92) Forum
>
datalogging question..
|
|
01-18-2010, 02:43 PM | #1 |
Banned
193
Rep 3,588
Posts |
datalogging question..
ok guys this is gonna be a pretty noob question..
i'm going to upgrade to 2.0 very shortly and very excited to datalog. but honstly i have no idea what to look for whats good whats bad etc, if anyone can please help me thanks in advance |
01-18-2010, 03:05 PM | #3 |
Major General
155
Rep 5,776
Posts |
You can start here using the BT interface.
http://www.hopesystemsinc.com/bmw_fats.asp You can also use the following config file. http://www.hopesystemsinc.com/BavTechLogFiles/ Edit: I beleive you are refering to the JB2 logging. However, BT provides siginificantly more and useful data. |
Appreciate
0
|
01-18-2010, 03:15 PM | #4 |
First Lieutenant
30
Rep 314
Posts
Drives: 07 BMW 335i Sedan+2 Baby Seats
Join Date: Feb 2009
Location: SF South Bay Area, CA
|
What's the sampling rate if jb3 logging and can it log useful things like ignition advance (for knock detection), timing correction, engine temp, or actual throttle?
__________________
11.535@124.423mph (1.641 60') - AutoTune 7-27, Race+Meth, Best ET w/ only 80% throttle 1st and 2nd
11.647@121.356mph (1.590 60') - AutoTune (beta pre-5-15), Race Gas, No METH Perf Mods: Vishnu PROcede Rev3 v5, Vishnu PWM Meth Kit, AR Design DPs, AE Exhaust, Helix FMIC, Vishnu DCI, Forge DV, WaveTrac LSD (Best Trap - 124.665mph) |
Appreciate
0
|
01-18-2010, 03:18 PM | #5 | |
Major General
155
Rep 5,776
Posts |
Quote:
As for sampling rate, I do hope that is improved. Of the logs posted, it appears to be in the 1 - 2 Hz range which is not very good. IMO, it would have been better to not post logs showing such a poor sampling rate. |
|
Appreciate
0
|
01-18-2010, 03:20 PM | #6 | |
Joint Chiefs of Staff
4980
Rep 116,110
Posts |
Quote:
If you are looking for knock retard to see if you're running too much boost for your octane, then the BT is a good choice. There are also hundreds of other channels you might want to log with the BT depending on what you're trying to figure out. Mike |
|
Appreciate
0
|
01-18-2010, 03:22 PM | #7 | |
Banned
193
Rep 3,588
Posts |
Quote:
|
|
Appreciate
0
|
01-18-2010, 03:27 PM | #8 |
Custom Powder Coater
149
Rep 2,784
Posts |
__________________
|
Appreciate
0
|
01-18-2010, 03:32 PM | #9 |
Joint Chiefs of Staff
4980
Rep 116,110
Posts |
For full vehicle diagnostics including ECU code reading you'll want the BT cable. No other way to read/delete codes with the tune removed via the OBDII. Plus its only $120 if you buy it at the same time as your JB3. For those of you who are older customers, just share an ET cable with some friends to save a few bucks.
Mike |
Appreciate
0
|
01-18-2010, 03:33 PM | #10 | |
Major General
155
Rep 5,776
Posts |
Quote:
|
|
Appreciate
0
|
01-18-2010, 03:40 PM | #11 | |
First Lieutenant
30
Rep 314
Posts
Drives: 07 BMW 335i Sedan+2 Baby Seats
Join Date: Feb 2009
Location: SF South Bay Area, CA
|
Quote:
From my experience limited experience with data acquisition and race cars, datalogging is something that needs to be done right (at least 20 samples/sec with all useful channels available) or not at all. Poor datalogging is like relying on w thermometer that sometimes reads incorrectly (or not at all) to diagnose a fever.
__________________
11.535@124.423mph (1.641 60') - AutoTune 7-27, Race+Meth, Best ET w/ only 80% throttle 1st and 2nd
11.647@121.356mph (1.590 60') - AutoTune (beta pre-5-15), Race Gas, No METH Perf Mods: Vishnu PROcede Rev3 v5, Vishnu PWM Meth Kit, AR Design DPs, AE Exhaust, Helix FMIC, Vishnu DCI, Forge DV, WaveTrac LSD (Best Trap - 124.665mph) |
|
Appreciate
0
|
01-18-2010, 03:50 PM | #12 | |
Major General
155
Rep 5,776
Posts |
Quote:
But to be honest, I believe the JB logger is really just part of the interface for the loading of maps. The viewing of live data and logging is just ancillary. The JB is still fully dependant on the BT interface for logging. The only thing the JB logger provides is real boost level which of course the BT interface only shows what the JB allows it to see. Judge for yourself on the below. It looks like the X axis are samples. But looking at the steps it doesn't look to be much better than 1 - 2 Hz. http://www.e90post.com/forums/showthread.php?t=341687 As for the BT interface. If I limited the number of channels, I could get 15 Hz. But when logging many, 10 Hz was the norm. Not terrific but much better than the OBDII interfaces were providing; about 2 Hz. |
|
Appreciate
0
|
01-18-2010, 03:52 PM | #13 | |
Joint Chiefs of Staff
4980
Rep 116,110
Posts |
Quote:
Mike |
|
Appreciate
0
|
01-18-2010, 03:56 PM | #14 | |
Major General
155
Rep 5,776
Posts |
Quote:
Semantics I suppose. |
|
Appreciate
0
|
01-18-2010, 03:56 PM | #15 |
Custom Powder Coater
149
Rep 2,784
Posts |
__________________
|
Appreciate
0
|
01-18-2010, 03:58 PM | #16 |
Major General
155
Rep 5,776
Posts |
|
Appreciate
0
|
01-18-2010, 04:02 PM | #18 |
Joint Chiefs of Staff
4980
Rep 116,110
Posts |
|
Appreciate
0
|
01-18-2010, 04:06 PM | #19 | |
First Lieutenant
30
Rep 314
Posts
Drives: 07 BMW 335i Sedan+2 Baby Seats
Join Date: Feb 2009
Location: SF South Bay Area, CA
|
Quote:
__________________
11.535@124.423mph (1.641 60') - AutoTune 7-27, Race+Meth, Best ET w/ only 80% throttle 1st and 2nd
11.647@121.356mph (1.590 60') - AutoTune (beta pre-5-15), Race Gas, No METH Perf Mods: Vishnu PROcede Rev3 v5, Vishnu PWM Meth Kit, AR Design DPs, AE Exhaust, Helix FMIC, Vishnu DCI, Forge DV, WaveTrac LSD (Best Trap - 124.665mph) |
|
Appreciate
0
|
01-18-2010, 04:07 PM | #20 |
Major General
155
Rep 5,776
Posts |
|
Appreciate
0
|
01-18-2010, 04:18 PM | #21 | |
Joint Chiefs of Staff
4980
Rep 116,110
Posts |
Quote:
I can say I've been monitoring boost on my P3 gauge and its pretty much dead-nuts on with the logging software. Each channel probably has an ideal sample rate. Boost might be 10, timing might be 30, TPS might be 20, IAT might be 2, and so forth. Despite what you and Scalbert have added the new logging features have been extremely invaluable to us beta testers, and are a great addition to the JB3. If you guys want 100 samples a second for some reason and think its useful you can always sample them yourself using external equipment. Mike |
|
Appreciate
0
|
01-18-2010, 04:30 PM | #22 | |
Joint Chiefs of Staff
4980
Rep 116,110
Posts |
Quote:
DataLog File Mike |
|
Appreciate
0
|
Bookmarks |
|
|