Data Logs! Post them here.

[pym19109]

After adjusted timing by following Steve and Tor, FLKC is better now but another thing surprise me ---- AFR is richer.
Before adjusting : https://datazap.me/u/shirokuma/log-1...mark=2336-2347
After adjusting : https://datazap.me/u/shirokuma/stg2-...5&mark=310-321

I had adjusted only Base Timing B. Not sure what affect it to run rich.
(Both log done after drove 160km)

[pym19109]

Update: Lastest log https://datazap.me/u/shirokuma/stg2-...-1056-597-1067

afr back to normal. Not sure what factor play a role with my afr.
but rain would almost fall when i logged that rich log.

[Rezi]

Originally Posted by pym19109

After adjusted timing by following Steve and Tor, FLKC is better now but another thing surprise me ---- AFR is richer.
Before adjusting : https://datazap.me/u/shirokuma/log-1...mark=2336-2347
After adjusting : https://datazap.me/u/shirokuma/stg2-...5&mark=310-321

I had adjusted only Base Timing B. Not sure what affect it to run rich.
(Both log done after drove 160km)

Because you had different LTFT set in those two logs.
Your AFR will change "a lot" in the beginning (depends on scaling).
Someday it will run leaner, some richer.

[solidONE]

Originally Posted by pym19109

After adjusted timing by following Steve and Tor, FLKC is better now but another thing surprise me ---- AFR is richer.
Before adjusting : https://datazap.me/u/shirokuma/log-1...mark=2336-2347
After adjusting : https://datazap.me/u/shirokuma/stg2-...5&mark=310-321

I had adjusted only Base Timing B. Not sure what affect it to run rich.
(Both log done after drove 160km)

LTFT difference is the cause of richer afr. Also, since this is a OFT log your Commanded AFR is a couple points richer than what is on the map. For instance if your commanded is showing 12.5 afr on a OFT log, actual targeted afr on the map is closer to 12.3 afr. So it's really not as far off as it seems in either logs.

-1.56 LTFT https://datazap.me/u/shirokuma/stg2-...1&mark=310-321

-2.34 LTFT https://datazap.me/u/shirokuma/log-1...mark=2336-2347

[ermax]

I recently picked up a 2013 FR-S and between 3-4.5k it sounds like rod knock. What is odd is it doesn't sound knocky with zero load which is typically when you would hear rod knock. It seems to start sounding knocky with moderate throttle. It also doesn't sound knocky on a cold start the way a rod bearing typically sounds as it's on it's way out. So I'm fairly convinced it isn't rod knock but having spun bearing on multiple cars multiple times I am a bit paranoid. Doing some reading I am sort of suspicions of the OCVs not handling VVT properly which may cause some of the knocky sound. The car also idles strange (even though I've flashed to B01C already). I used Techstream to log the cams and it does seem like both intake and exhaust on the right bank are a little less stable than the left bank. What I am unsure of is how much deviation is acceptable. It looks like the right ex cam never returns to zero. It seems to stop at 1.6deg. It also looks like there is a little oscillation on both cams on the right side but again, how much is considered normal?

Anyways, here is the log. Hopefully someone with more experience with the FA20 can share their opinion.

https://datazap.me/u/ermax/log-15078...zoom=5680-6954

[Firecruiser]

I recently installed a jdl uel header and flashed a slightly modified stg 2 uel tune. I took some logs and nothing seems really out of range to me but maybe more experienced eyes can tell me. These are just some logs of mostly closed loop driving recently after the flash. I plan on taking an open loop log after another 20 miles or so. There are three logs in this group.

https://datazap.me/u/firecruiser/fir...s?log=1&data=1

[Tor]

I get quite substantial FBKC around 3700 rpm and I have no clue why. This is without any sudden throttle changes. On previous tunes, I don't recall having this problem so I don't suspect false knock from exhaust rattling on something. The problem has only really been present in the last few flashes.

https://datazap.me/u/tor/tor-2341-0?...zoom=9242-9287



Those who read my previous posts know I increased timing a lot, but never below 4000 rpm. In fact, I've taken out up to -1.76 deg in the problem area, but it seems to have no effect:



It's getting quite annoying and I'm not sure what to do. I can't really see anything wrong in the logs. If someone could look it over, it would be much appreciated!

Things I'm considering:

- Set CL Fueling Target Compensation richer at 3600 loads 0.6/0.7. Is it likely to help? And how much richer should I try for it possibly to have any effect?

- Increase Port Injection ratio from 0 to 20% at lower loads (I currently run 20% PI from 2000 rpm up above load 0.9 and it seems to work fine with regards to knock). Is it likely to help? And is there any danger to changing this?

- Seeing it's running 100% direct injection when this happens, could it be GDI firing angles that are off?
The current values comes from OFT tunes, but they are unchanged from stock below load 0.8. I really don't have much clue about these tables. But considering I run the Gruppe-S UEL header, is that block of 300ish values still appropriate? Or would it make more sense to overwrite it all with 320 as in most of the surrounding cells?

[Nobunnyhere.86]

How do I change the cal on a XML file?

[solidONE]

Originally Posted by Tor

I get quite substantial FBKC around 3700 rpm and I have no clue why. This is without any sudden throttle changes. On previous tunes, I don't recall having this problem so I don't suspect false knock from exhaust rattling on something. The problem has only really been present in the last few flashes.

https://datazap.me/u/tor/tor-2341-0?...zoom=9242-9287



Those who read my previous posts know I increased timing a lot, but never below 4000 rpm. In fact, I've taken out up to -1.76 deg in the problem area, but it seems to have no effect:



It's getting quite annoying and I'm not sure what to do. I can't really see anything wrong in the logs. If someone could look it over, it would be much appreciated!

Things I'm considering:

- Set CL Fueling Target Compensation richer at 3600 loads 0.6/0.7. Is it likely to help? And how much richer should I try for it possibly to have any effect?

- Increase Port Injection ratio from 0 to 20% at lower loads (I currently run 20% PI from 2000 rpm up above load 0.9 and it seems to work fine with regards to knock). Is it likely to help? And is there any danger to changing this?

- Seeing it's running 100% direct injection when this happens, could it be GDI firing angles that are off?
The current values comes from OFT tunes, but they are unchanged from stock below load 0.8. I really don't have much clue about these tables. But considering I run the Gruppe-S UEL header, is that block of 300ish values still appropriate? Or would it make more sense to overwrite it all with 320 as in most of the surrounding cells?

Uh-oh... this looks like the same thing I've been dealing with since switching to these long tube headers... Have you tried reverting to a previous tune that did not have this? Still same result with the older tune? Any hardware changes such as the front pipe (specifically the front pipe, I mean)?

[Tor]

Originally Posted by solidONE

Uh-oh... this looks like the same thing I've been dealing with since switching to these long tube headers... Have you tried reverting to a previous tune that did not have this? Still same result with the older tune? Any hardware changes such as the front pipe (specifically the front pipe, I mean)?

My bad... This seems to have been a problem for much longer than I realise. The exhaust is the Gruppe-S header, rest of the exhaust stock. It's been like that since last winter.

These are logs from some 20 revisions ago, and before I started changing major things like MAF and Engine Load Compensation tables.

https://datazap.me/u/tor/tor-218-col...om=15725-15791
Or:
https://datazap.me/u/tor/tor-219-maf...zoom=5283-5392

I don't know how I missed it.

I did another log today where I tried to provoke it and it more or less either has FBKC or FLKC in that area every time. And I even switched from 100 to 102 octane fuel.

https://datazap.me/u/tor/tor-2341-lo...-31-32&solo=23

So it's definitively something that needs to be addressed.

- Is it correct that conventional wisdom says that direct injection adds more knock resistance than port injection? Still could it perhaps be an idea to run 20% port injection in lower loads?

- Could it perhaps help simply to make CL fueling target richer at that area?

- Could the AVCS be off for the Gruppe-S header in that area?

- Am I overthinking this and should I simply just take out another deg of timing in the few problem cells?

Compared to higher loads (where it doesn't knock), those are the only differences I can think of?

[Wayno]

I have a fix.

Stop logging FBKC.

[Tor]

Originally Posted by Wayno

I have a fix.

Stop logging FBKC.

I understand where you are coming from. However, it has FLKC in that area as well, so something is definitively going on there. Even if it isolated doesn't matter I think there is a penalty in not correcting it.

I could be wrong, but from my experience so far, my hypotesis is that if it knocks in one area it causes heating up of the internals and it will knock somewhere else where it's at the limit as well. E.g. in the last log where I countinuously provoke it by driving through the problem area it later starts to FLKC in areas where it otherwise doesn't knock.



And if it can be corrected, why not do it...

[solidONE]

Originally Posted by Tor

I understand where you are coming from. However, it has FLKC in that area as well, so something is definitively going on there. Even if it isolated doesn't matter I think there is a penalty in not correcting it.

I could be wrong, but from my experience so far, my hypotesis is that if it knocks in one area it causes heating up of the internals and it will knock somewhere else where it's at the limit as well. E.g. in the last log where I countinuously provoke it by driving through the problem area it later starts to FLKC in areas where it otherwise doesn't knock.



And if it can be corrected, why not do it...

If you find a solution please let me know lol. If it's anything like what I'm seeing, and I think it's very similar if not the same cause, then reducing the base timing or adding fuel will have little to no effect. I've not tried to adjust the port injector ratio, so maybe you're onto something there. I did, however, try making small adjustments to cam timing and it seemed to only shift the FBKC around very slightly but did not eliminate it. My guess is that it's actually some sort of false knock that the knock sensor is picking up, and not actual knock (at least on my setup). Though that might just be wishful thinking on my part. I really dont know for certain.

[Tor]

Originally Posted by solidONE

If you find a solution please let me know lol. If it's anything like what I'm seeing, and I think it's very similar if not the same cause, then reducing the base timing or adding fuel will have little to no effect. I've not tried to adjust the port injector ratio, so maybe you're onto something there. I did, however, try making small adjustments to cam timing and it seemed to only shift the FBKC around very slightly but did not eliminate it. My guess is that it's actually some sort of false knock that the knock sensor is picking up, and not actual knock (at least on my setup). Though that might just be wishful thinking on my part. I really dont know for certain.

I flashed a tune with 20% port injection from load 0.6 in 3200 to 4200 rpm. Will drive it tomorrow and log.