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Old 04-19-2006, 01:34 AM   #1
nutzkicker617
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Member#: 63255
Join Date: Jun 2004
Location: SoCal. Pasadena Area
Vehicle:
2007 M Coupe
Alpine White

Default how to read data logs? is there a FAQ? or already written somwhere?

i have already serached and have not come up with like a "tutorial" of whwat to look for once i have data logged...im going to log with the ecu explorer this weekend but i have no idea wat kind of logs are "right" or healthy..lke what vaules to look for for air fuel ,knock timing and etc...wat parameters are the important ones to look for and what are the acceptable ranges?

thanx
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Old 04-19-2006, 08:59 AM   #2
Vampyr
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2005 sold! STi
Aspen White w/ Gold rims

Default

same here...
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Old 04-19-2006, 12:09 PM   #3
fenix_black
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Silver

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+1

anyone know where there might be somehtin like this?
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Old 04-19-2006, 05:39 PM   #4
tmarcel
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Default

I don't know of any "tutorial". You'll pretty much have to read the forums here (becareful what you read though as it's not always accurate) or maybe books on tuning, which there are several that you can buy.

The basics from a log would be to start with rpms vs AFR, timing, and boost. You can see if these are bouncing around or too high or low. From there you can see injector duty cycles, MAF voltage, knock, and a host of other variables that will lead you to whatever you're trying to answer.

I've learned a few things recently myself. I never realized the importance of a clean reading MAFv. The feedback from the sensor is important to the overall fuel tune. On mine, I'm having another MAF housing made tomorrow because of this.

Maybe you might start by posting a log and asking questions. That will likely bring you up to speed.
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Old 04-19-2006, 06:24 PM   #5
nutzkicker617
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cool thanx
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Old 04-20-2006, 01:32 PM   #6
wi77iam
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Here is a good tutorial about ecu diagnostic data on the ecutek site .
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Old 04-20-2006, 05:07 PM   #7
Jeramie
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2004 WRX
Blue

Cool

Quote:
Originally Posted by nutzkicker617
i have already serached and have not come up with like a "tutorial" of whwat to look for once i have data logged...im going to log with the ecu explorer this weekend but i have no idea wat kind of logs are "right" or healthy..lke what vaules to look for for air fuel ,knock timing and etc...wat parameters are the important ones to look for and what are the acceptable ranges?

thanx
Start looking, and asking questions before long all the numbers will start to make sense.

EDIT: I almot forgot, this forum has a place specifically to ask questions about logs

http://www.tari.co.za/
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Old 05-31-2006, 12:10 PM   #8
Beanboy
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Would be nice to get some general guidlines posted somewhere.

For example, noticed -2 KC at part throttle (10-12%) after a pull, timing went up into the 40s though. Found out that is fairly normal.

More general statements all in one place would be cool.
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Old 05-31-2006, 12:16 PM   #9
GMTarkin
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I've not found it to be very difficult, however, it did take time to get used to.

Really all you're doing is looking for irregularities, and then using them to diagnose a problem you have.
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Old 05-31-2006, 12:37 PM   #10
jdgrimm
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i've been thinking the same thing for awhile now....

http://forums.nasioc.com/forums/show....php?t=1015846
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Old 05-31-2006, 01:07 PM   #11
Jeramie
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Default

Just about all the forums, openecu.org, tari.co.za, and enginuity.org all have forum specifically for post your logs and asking questions.

NASIOC is a great site for technical (Mechanical) questions, but I think you find the most help with opensource sw on the opensource forums.
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