Data Logs! Post them here.

[solidONE]

I decided to bump up the port injection to hold at 40~30% between 0.6~0.7 loads up to 4200 rpm using the same lazy change I did earlier and took a log.



Again the FBKC is showing up more often in the higher gears than the lower gears.

This section of the log I'm doing a 3rd gear pull at 0.6 loads then the same in 4th 2x in a row. There was no FBKC in 3rd, but then shows up in 4th gear:
https://datazap.me/u/solidone/z7-kc2...zoom=3064-4544

Then later on in the log the FBKc shows up in a 3rd gear pull @ 0.6 load:
https://datazap.me/u/solidone/z7-kc2...zoom=6179-6407

Right after that same thing in 2nd gear, no FBKC:
https://datazap.me/u/solidone/z7-kc2...zoom=6529-6796

It's definitely doing something..., but not really.

[Tor]

Originally Posted by solidONE

I decided to bump up the port injection to hold at 40~30% between 0.6~0.7 loads up to 4200 rpm using the same lazy change I did earlier and took a log.



Again the FBKC is showing up more often in the higher gears than the lower gears.

This section of the log I'm doing a 3rd gear pull at 0.6 loads then the same in 4th 2x in a row. There was no FBKC in 3rd, but then shows up in 4th gear:
https://datazap.me/u/solidone/z7-kc2...zoom=3064-4544

Then later on in the log the FBKc shows up in a 3rd gear pull @ 0.6 load:
https://datazap.me/u/solidone/z7-kc2...zoom=6179-6407

Right after that same thing in 2nd gear, no FBKC:
https://datazap.me/u/solidone/z7-kc2...zoom=6529-6796

It's definitely doing something..., but not really.

Your FBKC is also a lot worse than mine, so maybe the cause is different?

I flashed the ratio I was considering in my last post. So PI is now active pretty much all the time. It's not like it's magic, there is still FBKC here and there, but it seems like an overall improvement.

https://datazap.me/u/tor/tor-2343?log=0&data=22 (two logs).

Then there is the other side of things, the nonmeasurable butt feeling. I think it pulls better at partial throttle and it seems to run smoother. It influences my fuel trims a bit so I properly have to do some adjustments to Engine Load Compensation. Maybe I'll try to make another adjustment to the ratios first.

Maybe something like this for more consistent fuel trims:


Unrelated to the PI ratio discussion, it drops IAM in the previous log (second log) to 0.97 and it takes quite a while to get it back to 1 which makes it interesting to observe that it runs positive FLKC during WOT most of the time. E.g.:

https://datazap.me/u/tor/tor-2343?lo...zoom=9792-9920

[solidONE]

@Tor Do you have any way to display engine load in real time while you are logging? The reason why the FBKC is so high in my logs is because I held and maintained the load in the trouble area of 0.6. In normal driving conditions where engine load fluctuates more the FBKC would not build up like it shows in my logs. Once the load goes below or above the 0.6 range at the same rpms there would be no FBKC.

Here's an example from your log:

https://datazap.me/u/tor/tor-2343?lo...-7942-7952-897

At the point where you reached the area of around 0.6 loads FBKC start to build, but once you drop below that problem area the FBKC also starts to drop toward 0. Though looking at this log it seems you have FBKC in areas of high load as well not just the 0.6 range. But, as I've said before. If it works better, in this case less KC, its hard to argue against the changes.

[Tor]

Originally Posted by solidONE

@Tor Do you have any way to display engine load in real time while you are logging? The reason why the FBKC is so high in my logs is because I held and maintained the load in the trouble area of 0.6. In normal driving conditions where engine load fluctuates more the FBKC would not build up like it shows in my logs. Once the load goes below or above the 0.6 range at the same rpms there would be no FBKC.

Here's an example from your log:

https://datazap.me/u/tor/tor-2343?lo...-7942-7952-897

At the point where you reached the area of around 0.6 loads FBKC start to build, but once you drop below that problem area the FBKC also starts to drop toward 0. Though looking at this log it seems you have FBKC in areas of high load as well not just the 0.6 range. But, as I've said before. If it works better, in this case less KC, its hard to argue against the changes.

No, unfortunately, I can't see anything live when I log with Tactrix.

I zoomed the examples away on purpose when I linked the log in the previous post. Check it with a couple of more parameters: ECT 40 deg C and oil temp 29 deg where you zoomed in. The high load example with -4.2 I suppose is my bad for fully loading the engine at 2800 rpm with ECT 55 and oil temp 37 deg.

The rest of the logs there is no such high FBKC so I don't think it's representative for when the engine is warmed up.

Anyway, I made a new PI ratio change today and a new set of logs to re-adjust my ELC table. Maybe 1 hour logs in total. Highest recorded FBKC once -1.4 when flooring it below 2000 rpm. The rest an occasional -0.7.

My approach: "Isolate. Simplify. Complete."



3 selected logs here. First one is normally a killer: CL pulls up and down a twisty hill where I usually get tons of FLKC, FBKC and sometimes IAM drops:
https://datazap.me/u/tor/tor-2344?log=0&data=22-31-32

[solidONE]

There is one spot where you held the load at 0.6 and the FBKC is minimal and did not build up like in my logs. That's a good sign. Well done. Too bad I couldn't get rid of the FBKC using the same trick.

https://datazap.me/u/tor/tor-2344?lo...zoom=1032-1270

[Tor]

Originally Posted by solidONE

There is one spot where you held the load at 0.6 and the FBKC is minimal and did not build up like in my logs. That's a good sign. Well done. Too bad I couldn't get rid of the FBKC using the same trick.

https://datazap.me/u/tor/tor-2344?lo...zoom=1032-1270

It's at higher rpm though. But given that it's not really a normal driving condition maybe it's not that big of a problem in any case?

The experience I made so far leads me to the conclusion that keeping conditions in the combustion chamber as constant as possible is better.

Also, the reason I chose to make it uniform 50% is that the injectors don't seem to be scaled that precisely to each other. So changing the ratio with changing load, I suppose, will cause a changing fueling error, which the ECU will constantly be behind and have to keep up to.

With constant injector ratios in each rpm row, one variable is eliminated. Fuel is looked up from rpm/load and the only variable left is then MAP which is then corrected with Engine Load Compensation. So with a bit of luck, this should hopefully make for less swings in the fuel trims. With varying injector ratios, the ELC MAP compensations might be off depending on in which load and subsequent which injector ratio it sits.

Of course, I could also be totally wrong about everything and just gotten lucky and the next day it will have the same knock again. All I write is just hypothesis and should be taken with a grain of salt.

I uploaded the rest of the logs too (3 more) from today's drive:
https://datazap.me/u/tor/tor-2344-22

I think this is coming to an end for me. With the logs from today, I corrected my ELC table and will flash that tomorrow. If it doesn't act up I think I am done until next summer. Then I'll see if the added timing will hold up to warmer temps or if I have to do something, either with compensations or remove timing again. I already prepared a bit. It seemed there was a lot of wasted cells in the IAT timing compensation activation table that could be put to better use:

[solidONE]

Originally Posted by Tor

It's at higher rpm though. But given that it's not really a normal driving condition maybe it's not that big of a problem in any case?

The experience I made so far leads me to the conclusion that keeping conditions in the combustion chamber as constant as possible is better.

Also, the reason I chose to make it uniform 50% is that the injectors don't seem to be scaled that precisely to each other. So changing the ratio with changing load, I suppose, will cause a changing fueling error, which the ECU will constantly be behind and have to keep up to.

With constant injector ratios in each rpm row, one variable is eliminated. Fuel is looked up from rpm/load and the only variable left is then MAP which is then corrected with Engine Load Compensation. So with a bit of luck, this should hopefully make for less swings in the fuel trims. With varying injector ratios, the ELC MAP compensations might be off depending on in which load and subsequent which injector ratio it sits.

That's actually very true. The way the injectors, port vs direct, are scaled its is not very precise. With changing ratios you can see in logs how the afr and fuel trims are effected. I've also noticed the same thing for a while, but never thought it a big enough problem to address it with the injector ratios. Then again, I'd never considered that it would contribute much to the knock corrections I was seeing. I'm going to try to play with this a little more before throwing in the towel.

Edit: I edited my port injector ratio to be a bit more constant at the problem areas between 0.5~0.7 loads and 3000~4200 rpms.

Again.. pretty much the same results as before I made any changes to that table.

The FBKC still has the tendency to kick in at around 3500 rpms at 0.6 load and start to reduce at the same loads from about 3900rpms.
https://datazap.me/u/solidone/z7-kc2...mark=4655-4621

in the same log under the same loads and RPMs, no KC activity:
https://datazap.me/u/solidone/z7-kc2...mark=4655-4621

Same with back to back 'pulls' with the same loads and rpm range, without FBKC then with FBKC immediately after... (talk about 'phantom knock' am I right?) I'd say it kicks in about 60~70% of the time under same or similar conditions.
https://datazap.me/u/solidone/z7-kc2...mark=4655-4621

Side note: This winter blend gas is not only more knock prone, but is also really doing a number on my afr and fuel trims. It runs noticeably leaner with no changes to maf scale compared to the non-winter blend fuel.
https://datazap.me/u/solidone/z7-kc2...mark=4655-4621

[Tor]

Originally Posted by solidONE

That's actually very true. The way the injectors, port vs direct, are scaled its is not very precise. With changing ratios you can see in logs how the afr and fuel trims are effected. I've also noticed the same thing for a while, but never thought it a big enough problem to address it with the injector ratios. Then again, I'd never considered that it would contribute much to the knock corrections I was seeing. I'm going to try to play with this a little more before throwing in the towel.

Maybe it doesn't play a part at all. I just though when I'm changing it anyway, I might as well change it to something that provides more consistency.

Maybe I will regret the split between 50 and 20% at 3000 rpm at high loads. I'll see how it works out with regards to WOT LTFT.

Edit: I edited my port injector ratio to be a bit more constant at the problem areas between 0.5~0.7 loads and 3000~4200 rpms.

Again.. pretty much the same results as before I made any changes to that table.

The FBKC still has the tendency to kick in at around 3500 rpms at 0.6 load and start to reduce at the same loads from about 3900rpms.
https://datazap.me/u/solidone/z7-kc2...mark=4655-4621

in the same log under the same loads and RPMs, no KC activity:
https://datazap.me/u/solidone/z7-kc2...mark=4655-4621

Same with back to back 'pulls' with the same loads and rpm range, without FBKC then with FBKC immediately after... (talk about 'phantom knock' am I right?) I'd say it kicks in about 60~70% of the time under same or similar conditions.
https://datazap.me/u/solidone/z7-kc2...mark=4655-4621

It's a shame you can't log more parameters at the same time. Not that it means anything, but the only differences I can see between a pull where it doesn't knock and where it does are the STFT:

No knock, fairly constant STFT:
https://datazap.me/u/solidone/z7-kc2...mark=4655-4621

With knock, some swings prior to the knock:
https://datazap.me/u/solidone/z7-kc2...01-913-904-905

No effect on the logged AFR though. Maybe it's irrelevant or maybe the resolution of the OFT doesn't show what happens inbetween?

By the way, with catless I would zero out the A/F #3 Learning Limits (rear o2 sensor). It threw me off quite a bit and is another variable eliminated.

https://datazap.me/u/solidone/z7-kc2...mark=4596-4685

Side note: This winter blend gas is not only more knock prone, but is also really doing a number on my afr and fuel trims. It runs noticeably leaner with no changes to maf scale compared to the non-winter blend fuel.
https://datazap.me/u/solidone/z7-kc2...mark=4655-4621

What the need for winter blend in California?

[srt4evah]

Got an OEM airbox swapped back on, no more Injen intake. Complete world of difference, IAM was at .23 when I started the car, so I drove it a bit and let it go back up, then flashed Wayno's Stg1 E5 93oct Default and logged for 20 minutes. Never dropped below .80 IAM, so much better!

https://datazap.me/u/srt4evah/oem-ai...=0&data=1-5-10

[Vin]

Originally Posted by srt4evah

Got an OEM airbox swapped back on, no more Injen intake. Complete world of difference, IAM was at .23 when I started the car, so I drove it a bit and let it go back up, then flashed Wayno's Stg1 E5 93oct Default and logged for 20 minutes. Never dropped below .80 IAM, so much better!

https://datazap.me/u/srt4evah/oem-ai...=0&data=1-5-10

Can you get better fuel? Iam isn't suppose to drop that much on wayno. Or flash the 91 oct tune.

[Wayno]

Originally Posted by Vin

Can you get better fuel? Iam isn't suppose to drop that much on wayno. Or flash the 91 oct tune.

They're still aggressive, so they will definitely pull timing immediately after flashing.

Just less lumpy, making adjustment quicker/ more intuitive.

[solidONE]

Originally Posted by Tor

What the need for winter blend in California?

Exactly.. Though I think it's more about the cheaper gas than it is about the weather.

http://www.popularmechanics.com/cars...ence-13747431/

[Hadalet]

Couple 3gp from tonight. Any help is appreciated 😎

https://datazap.me/u/hadalet/log-150...4?log=0&data=1


https://datazap.me/u/hadalet/log-150...?log=1&data=14



Sent from my SAMSUNG-SM-G891A using Tapatalk

[Wayno]

Rich af.

Originally Posted by Hadalet

Couple 3gp from tonight. Any help is appreciated 😎

https://datazap.me/u/hadalet/log-150...4?log=0&data=1


https://datazap.me/u/hadalet/log-150...?log=1&data=14



Sent from my SAMSUNG-SM-G891A using Tapatalk