Data Logs! Post them here.

[Hadalet]

Originally Posted by Wayno

Rich af.

Thanks Wayno! What part of Australia are you from? Might be visiting my in-laws in Main Beach next summer. We try to visit every 2 or 3 years or so. Would be cool to meet up sometime 😎

Sent from my SAMSUNG-SM-G891A using Tapatalk

[bababooey]

@Tor - just figured out romraider and adjusted my tune a few weeks back.

https://datazap.me/u/n8brz/log-1510701990?log=0&data=1
^^after adjusting -2% maf scaling above 3.2v from original values. All interstate driving, only spot in middle I went full throttle in 3rd, had to slow up due to traffic coming up quick. I still need to run it up to redline for a better reading up top but was hesitant without reviewing the actual afr values & comparing them to targets as defined on Wayno's page (6000-6800 rpm). Oddly though I have a little knock at light throttle, is that any concern & why would that happen?


http://www.datazap.me/u/n8brz/tx-rr-...4&zoom=327-481
^^ as compared to this one a few months back.


Thanks again.

[Tor]

Originally Posted by bababooey

@Tor - just figured out romraider and adjusted my tune a few weeks back.

https://datazap.me/u/n8brz/log-1510701990?log=0&data=1
^^after adjusting -2% maf scaling above 3.2v from original values. All interstate driving, only spot in middle I went full throttle in 3rd, had to slow up due to traffic coming up quick. I still need to run it up to redline for a better reading up top but was hesitant without reviewing the actual afr values & comparing them to targets as defined on Wayno's page (6000-6800 rpm). Oddly though I have a little knock at light throttle, is that any concern & why would that happen?


http://www.datazap.me/u/n8brz/tx-rr-...4&zoom=327-481
^^ as compared to this one a few months back.


Thanks again.

Looks much better. The light knock is normal, blame it on 12.5:1 compression ratio. It doesn't have anything to do with the change you made. First at light throttle it doesn't reach those MAF v that you changed. And more important, at light throttle it's on closed loop and adjusts the fuel to the correct ratio constantly.

If you do a few more full pull, you can see if you want to take out another %. But the way it is now, you could also just leave it in my opinion.

[solidONE]

I added about 4 gallons of fuel from a mobil gas station when my gas light turned on. While I thought the Shell winter blend gas was bad, this Mobil 91 octane is much much worse.. Just FYI to the californians on this forum.

Log the day after I added the Mobil gas into my tank:
https://datazap.me/u/solidone/mobils...data=1-4-10-11

Shell "91 octane" Winter blend:
https://datazap.me/u/solidone/z7-kc2...data=1-4-10-11

[Baron_T]

I've been dialing in an OFT v3 beta Stage 2 (not 2+) tune using a combination of RomRaider for editing, the MAF Scaling Tool (thanks @Kodename47) and Josh F.'s spreadsheet for smoothing the MAF. And of course thanks to @Wayno and @steve99 for huge numbers of really helpful posts.

Hardware is a 2014 BRZ: stock intake with aftermarket panel filter, JDL catted exhaust header, otherwise stock exhaust. This is for a street car; I don't (yet) race or Auto X.

I've been basically following along what @Tor has been doing to tune AFR based on a combination of the MAF scale and the Engine Load Compensation table. I've been doing this as an incremental process, generally taking around 30% of the suggested adjustment to any one set of logs. (Sometimes 50% if something is clearly way off, or if I've taken a lot of good data after a couple-hundred-mile trip.)

I've also been slowly pushing my Load Limits up and compensating for lower RPM / higher load pinging by pulling a bit of timing and/or richer fueling. Mostly because I see no good reason why this engine shouldn't perform reasonably well at 1600--2000 RPM when cruising around city streets. Again changes are all incremental.

https://datazap.me/u/baront/log-1511...og=0&data=1-10

In this log, I'm getting a bit of ping in the 374--453 time range. This looks to me like it could be right when lifting the throttle; Is there a good table to adjust to pull a bit more timing right on throttle lift?

[steve99]

Originally Posted by Baron_T

I've been dialing in an OFT v3 beta Stage 2 (not 2+) tune using a combination of RomRaider for editing, the MAF Scaling Tool (thanks @Kodename47) and Josh F.'s spreadsheet for smoothing the MAF. And of course thanks to @Wayno and @steve99 for huge numbers of really helpful posts.

Hardware is a 2014 BRZ: stock intake with aftermarket panel filter, JDL catted exhaust header, otherwise stock exhaust. This is for a street car; I don't (yet) race or Auto X.

I've been basically following along what @Tor has been doing to tune AFR based on a combination of the MAF scale and the Engine Load Compensation table. I've been doing this as an incremental process, generally taking around 30% of the suggested adjustment to any one set of logs. (Sometimes 50% if something is clearly way off, or if I've taken a lot of good data after a couple-hundred-mile trip.)

I've also been slowly pushing my Load Limits up and compensating for lower RPM / higher load pinging by pulling a bit of timing and/or richer fueling. Mostly because I see no good reason why this engine shouldn't perform reasonably well at 1600--2000 RPM when cruising around city streets. Again changes are all incremental.

https://datazap.me/u/baront/log-1511...og=0&data=1-10

In this log, I'm getting a bit of ping in the 374--453 time range. This looks to me like it could be right when lifting the throttle; Is there a good table to adjust to pull a bit more timing right on throttle lift?

for throttle lift knock, their are some tables to alter the Transient ignition retard tables.


open your current rom from a 2014 and then open a 2017 rom, toyota/Subaru have mad some big changes to the transient retard values.


copy in the transient retard tables from a 2017. note the tables are different axis so you have to do a bit of editing.


just remove the 0.2 load column as it same as the previous values and same as the following column. as the 2017 tables have extra column


these tables are active on large throttle transients

[enouf]

I've been logging to see what's making my idle dip to ~500 rpm when coming to a stop or when it's hot out & AC is on. I'm on E85 (~E72 during log) with PSR UEL+overpipe, stock everything else. Dyno tuned flex fuel on ecutek. Any ideas why my LTFT is all over the place? Exhaust leak?

https://datazap.me/u/enouf/51217-0755?log=0&data=6-11

[halujeddo]

Here is my logs, completely stock car except OFT stage 1 tune
60-70 miles after flashing stage 1 tune

2 times pull to redline, first third gear then fourth gear

https://datazap.me/u/halujeddo/log-1...og=0&data=1-13

Adv multiplier is about 0.66-0.68,
flkc is sometimes 0.35, sometimes -3

What do you think? Isn't it too bad? Can it be bad gas? (ron95 pump gas in Turkey)

[steve99]

Originally Posted by halujeddo

Here is my logs, completely stock car except OFT stage 1 tune
60-70 miles after flashing stage 1 tune

2 times pull to redline, first third gear then fourth gear

https://datazap.me/u/halujeddo/log-1...og=0&data=1-13

Adv multiplier is about 0.66-0.68,
flkc is sometimes 0.35, sometimes -3

What do you think? Isn't it too bad? Can it be bad gas? (ron95 pump gas in Turkey)

the fueling looks ok ltft is ok and afr looks about right for oft tune
but with 95 RON fuel the ignition timing is too aggressive the standard oft timing is for 91/93 usa fuels. which is at least 98 ron or better


this is causing knock ( negative flkc) reducing IAM.

[halujeddo]

Originally Posted by steve99

the fueling looks ok ltft is ok and afr looks about right for oft tune
but with 95 RON fuel the ignition timing is too aggressive the standard oft timing is for 91/93 usa fuels. which is at least 98 ron or better


this is causing knock ( negative flkc) reducing IAM.

Thanks for quick response!

We can’t find ron98 on market here.

So i need to reduce timing a bit. Could you please tell me which table should I reduce? Base timing A, base timing B or another?
And how many degrees should i go lower do you think?

[steve99]

Originally Posted by halujeddo

Thanks for quick response!

We can’t find ron98 on market here.

So i need to reduce timing a bit. Could you please tell me which table should I reduce? Base timing A, base timing B or another?
And how many degrees should i go lower do you think?

Base timing B is one you want.


you will need to log and find the load/rpm areas where you see negative FLKC. not areas where you get consistant negative flkc. then remove slightly less timing from those areas in the base B table. ie if you see -3 correction try removing -2.

[halujeddo]

Originally Posted by steve99

Base timing B is one you want.


you will need to log and find the load/rpm areas where you see negative FLKC. not areas where you get consistant negative flkc. then remove slightly less timing from those areas in the base B table. ie if you see -3 correction try removing -2.

Thanks again!

You mean that address the exact points where the negative FLKC starts and lower only that cell?

For instance, according to the log i've uploaded:

4900 rpm 1.1 load is the point where negative FLKC starts. (-1.7)
then, at 5300 rpm, it goes down to -1.35
then, at 5700 rpm, it goes down to -1
then, at 5900 rpm, it goes up to -1.65
then, at 6300 rpm, it goes down to -1.3
then, at 6500 rpm, it goes up to -3.35

Should I find the cell where the flkc goes high?

[steve99]

Originally Posted by halujeddo

Thanks again!

You mean that address the exact points where the negative FLKC starts and lower only that cell?

For instance, according to the log i've uploaded:

4900 rpm 1.1 load is the point where negative FLKC starts. (-1.7)
then, at 5300 rpm, it goes down to -1.35
then, at 5700 rpm, it goes down to -1
then, at 5900 rpm, it goes up to -1.65
then, at 6300 rpm, it goes down to -1.3
then, at 6500 rpm, it goes up to -3.35

Should I find the cell where the flkc goes high?

start one cell of rpm and load below where you initially see the knock, as the flkc is the reaction to knock that's already occurred.


pull about 1 degree from load 1.0 4800 rpm then about 2 degrees from 6300


log again and repeat

[Somerandom18]

Trying to diagnose a missfire issue most prominent at idle. There is no CEL being thrown. While idling there is a slight decrease in engine speed. Seems completely random. It's barely noticeable but can be felt when holding the shifter. Figured I'd investigate and figured out cylinder 2 is showing some weird and sporadic misfire numbers. Usually jumps around from ~50 to 250 then back down. The car vibration feels different when going to 250. Only goes up for a seconds or 2 before going back down.

I thought maybe dirty injector so I added some Lucas and shell 93. Nope. Took catch can off just to remove something from the equation.

My next step is to revert intake back to stock then swap coils. Then attempt to remove cyl 2 spark plug to inspect.

It doesn't seem to be causing any issues and the car is smooth as silk when actually driving. The misfire says it hovers around 50 + or - 5 when driving.

Car is a 2017 manual. Grimmspeed intake. OFT stage 2. Tomei UEL.

At work right now will take a log when going home and when idling. Not sure how long it has actually been doing this since it's so subtle.

Here it is. I can log different parameters if that would help. https://datazap.me/u/somerandom18/mi...?log=0&data=11