Data Logs! Post them here.

[JW843]

Originally Posted by steve99

Diagnosis ---- you don't have a problem.


STFT is supposed to vary widly in closed loop, and will be zero in open loop.


The LTFT of =/- 5% or less is good.
commanded afr and measured afr are close, maybe 3% rich top end but fine
IAM=1
no knock flkc or fbkc


all good

Well that's definitely reassuring news. Even having spikes in the +/-10-20% range is acceptable? I just don't remember having these patterns when I first tuned it a while back. Thanks for your help.

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[steve99]

Originally Posted by JW843

Well that's definitely reassuring news. Even having spikes in the +/-10-20% range is acceptable? I just don't remember having these patterns when I first tuned it a while back. Thanks for your help.

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yeah stft will vary a lot especially on large throttle changes this is normal

[JW843]

One last question for now, i went through and tightened a few things, cleaned my O2 sensors and tightened them, and put my GrimmSpeed CAI back on. I've been getting more consistent numbers but my LTFT is pretty high now, consistently when i'm on very little throttle and just cruising. Is this more indicative of a vacuum leak or an exhaust leak? I did a battery reset and have driven at least 50 miles to the point it's stabilized.

http://www.datazap.me/u/jwiggins864/...7?log=0&data=9

[trvth]

Long time lurker, first time datalog uploader ....


I just installed OFH3. I'm running 93. This is my first log. I did a pull in 3rd and a pull in 4th from about 2K to about 6K.


How's my OFH install, and does everything look safe?


Thanks much to those of you who take the time and trouble to help others. @steve99 or @Wayno or others with experience, could you please chime in? Thanks, guys!


http://datazap.me/u/trvth/pulls-3rd-...2?log=0&data=1

[neilvosko]

please take a look at the logs, its a 2016 BRZ, OFT is not reading MAF voltage so i am looking at MAF, using wayno's default stage 1, is this log good? like if it is not broke dont fix it? or do i have clean things up>? the gap in AFR at 3000 or so rpm is when i floor the throttle so i am guessing thats the transition

http://datazap.me/u/neilvosko/log-14...0&zoom=311-371

[neilvosko]

http://datazap.me/u/neilvosko/log-14...0&zoom=925-981

[neilvosko]

its like at 50 to 60 MAF, reason i ask is i am still learning but dont want to change things for the sake of change. @Wayno's default v122 maf scaling

http://datazap.me/u/neilvosko/log-14...zoom=1336-1401

[neilvosko]

looks like your are running a bit rich, consistently, have you tried a lean map ?
ie stage 1 or waynos lean map?

[steve99]

Originally Posted by neilvosko

its like at 50 to 60 MAF, reason i ask is i am still learning but dont want to change things for the sake of change. @Wayno's default v122 maf scaling

http://datazap.me/u/neilvosko/log-14...zoom=1336-1401

looks fine


its only about 2% off commanded afr no real need to change


you will get some deviation in AFR/commanded with large changes in throttle

[steve99]

Originally Posted by trvth

Long time lurker, first time datalog uploader ....


I just installed OFH3. I'm running 93. This is my first log. I did a pull in 3rd and a pull in 4th from about 2K to about 6K.


How's my OFH install, and does everything look safe?


Thanks much to those of you who take the time and trouble to help others. @steve99 or @Wayno or others with experience, could you please chime in? Thanks, guys!


http://datazap.me/u/trvth/pulls-3rd-...2?log=0&data=1

as the other guy said looks on the rich side , safe but costs a little power. Knock all good IAM 1 no FLKC


you rearly need to do a full throttle run in second or third, ie 100% throttle from 2000 to redline.


In your logs the throttle varies a lot during the higher rpm runs

[trvth]

Originally Posted by steve99

as the other guy said looks on the rich side , safe but costs a little power. Knock all good IAM 1 no FLKC


you rearly need to do a full throttle run in second or third, ie 100% throttle from 2000 to redline.


In your logs the throttle varies a lot during the higher rpm runs

Thanks for taking a look. Is it any "safer" to run a little rich, versus trying to lean it out a little for max power?

Here's a fresh log with a couple of hard pulls 2K -> 6K in 2nd and in 3rd.
http://datazap.me/u/trvth/wot-pulls-2nd-3rd

You guys really do a service for the community. I review these logs myself, but I just don't yet have enough experience to be confident in my conclusions.

[Rezi]

Fyi, OFT reads about 0.2 higher.

[steve99]

Originally Posted by trvth

Thanks for taking a look. Is it any "safer" to run a little rich, versus trying to lean it out a little for max power?

Here's a fresh log with a couple of hard pulls 2K -> 6K in 2nd and in 3rd.
http://datazap.me/u/trvth/wot-pulls-2nd-3rd

You guys really do a service for the community. I review these logs myself, but I just don't yet have enough experience to be confident in my conclusions.

looks fine is about 3% or so rich at mid/high rpm,

if your rearly kean you coudl reduce the flow values in the maf scale above 3.4v by say 2.5%. Dont change the volts numbers just the flow numbers.

[solidONE]

Originally Posted by Rezi

Fyi, OFT reads about 0.2 higher.

How do you know this? OFT reads what the factory computer reads from the O2 sensor. Unless the O2 calibration is off, there should be no reason that the OFT would read any leaner than what the O2 is reading.