Data Logs! Post them here.

[Jonathanlim]

Originally Posted by steve99

its not ideal but it wont blow up or anything, the ecu is managing the knock by dropping the iam to reduce timing, it happens all the time on the stock factory tune on petrol.

it an easy fix just note the rpm and load where the knock occurrs it will almost certianly be flkc knock then pull that ammount of timing out of the base timing B table cells in the tune.

i would not alter the tune unless your seeing that knock on the second or third tank of e85 as its most likely due to the resiual petrol in tank diluting the e85,, which i like
y the winter blend and already low ethanol percent

What is "normal" for knock correction on a stock tune? around -0.69 through -1.14? At what number Should I be really concern?

[steve99]

Originally Posted by Jonathanlim

What is "normal" for knock correction on a stock tune? around -0.69 through -1.14? At what number Should I be really concern?

Look at the IAM first on 93 fuel it should be 1

on 91 fuel it will probably vary a bit between 1 and maybe 0.7 or so

on 93 you will get less FBKC(knock correction) and FLKC maybe up to -1 or so

on 91 probably see up to -2 or -3 at times


here is a log of a guy on 95 RON south africian fuel probably your 89 this is on stock tune and they are not all blown up, the ecu is good at managing knock although power and economy will be reduced. you log will look much better even on 91

http://datazap.me/u/steve99/south-af...0-27-28&solo=2

[solidONE]

Originally Posted by churchx

solidONE: hmm, maybe some DI/PI injection adjustments may help on low rpm knock?

Originally Posted by solidONE

already done. Also increased the amount of tip in ignition advance being pulled, along with extra tip in enrichment. I've pull about 2* in those spots on the base timing table and still getting roughly the same amount of knock corrections... It's this winter blend gas, I tell you. (or that's what I'm assuming)

Edit: it actually isnt too bad in this log but flkc can go up to as much as 2~3* in the same areas.

Like so, but worse and at lower rpm's as in the other log lol (same day on a different route. short log due to road closure) : http://datazap.me/u/solidone/z6-cany...og=2&data=1-12

Edit 2: it looks like I'm still running around 40~20% port injection in the " trouble areas" I suppose I still have a lot of room to decrease the port/di ratio. Perhaps even go full DI or close to full DI.

decreased the port injection ratio and the results were not noticeably different.

http://datazap.me/u/solidone/z6-pi-k...0&data=1-11-12

http://datazap.me/u/solidone/z6-pi-kc?log=1&data=1-12

http://datazap.me/u/solidone/z6-pi?log=2&data=1-12

What do I do now? Increase DI% even more?

Edit:
Not sure what to blame all this knock correction on besides fuel quality since I was running more aggressive ignition advance and more port % previously (couple months ago) with less knock.

Earlier today after refueling:
http://datazap.me/u/solidone/z6-di-k...data=1-5-11-12

Edit 2: Same tank of gas as above. Kicking my ass, still.
http://datazap.me/u/solidone/z6-di-1...zoom=3448-3624

[steve99]

me and wayno gave up on those modded pi\di tables and went back to pretty well stock except for changing high rpm axis to run full di till 7000.

to much weird stuff happened with fuel trims especialky with air con running not sure why but not measurable benifit in changing to those ratios for me

[solidONE]

Originally Posted by steve99

me and wayno gave up on those modded pi\di tables and went back to pretty well stock except for changing high rpm axis to run full di till 7000.

to much weird stuff happened with fuel trims especialky with air con running not sure why but not measurable benifit in changing to those ratios for me

It does mess with the fuel trims quite a bit, but I think I have a handle on the change it makes. I will revert back to the old pi ratio map and see if anything changes in the knock corrections while I'm still on this tank of gas.

@steve99 I changed the PI ratio table to the original setting. No bueno... http://datazap.me/u/solidone/z6-og-1...=0&data=1-5-12

Although my butt dyno tells me the part throttle acceleration is less "crisp" compared with the maps with more DI. Smoother but throttle response is not quite as good and less eager to accelerate part throttle. Will stay on this map for a bit longer to see if it "settles in"

Also most of the knock correction being recorded is happening after 3200rpm so it's already 100% DI in those areas in all the different PI ratio maps. But, it does feel noticeably different to me at mid-high loads part throttle under 3200rpm. I need to see what happens once I run it harder.

[solidONE]

Here's the first log after refueling 10.6 gallons at the same gas station but a different pump only days later. Same tune as above. no adjustment made.

http://datazap.me/u/solidone/z6-og-1...oom=4220-11147

After a short while driving knock correction never exceeded -.69 where I was getting -2 or more under similar conditions. Toward the end of the log I was pumping the throttle on and off to induce tip in knock and there was no knock correction registered.

For reference this is the last log I took a day prior to refueling. http://datazap.me/u/solidone/z6-og-1...=1&data=1-5-12

Gas from the same gas station.... I cannot get over that...

[churchx]

There can be bad fuel fsck-ups at any chain of fuel stations, at any single specific station. It's less often that something bad can be said statistically about most stations of some chain in general. Just one-off bad luck, and this case illustrates it. Had some gotchas or heard stories from friends/collegues about most of chains, none seems perfect 100%. And good thing that ECUs are smart enough to retard timings to not damage engine, and imho wrong thing is to disable checks/safeguards by eg. tuning, as one never knows when bad luck of bad fuel may strike again.

[steve99]

Originally Posted by solidONE

Here's the first log after refueling 10.6 gallons at the same gas station but a different pump only days later. Same tune as above. no adjustment made.

http://datazap.me/u/solidone/z6-og-1...oom=4220-11147

After a short while driving knock correction never exceeded -.69 where I was getting -2 or more under similar conditions. Toward the end of the log I was pumping the throttle on and off to induce tip in knock and there was no knock correction registered.

For reference this is the last log I took a day prior to refueling. http://datazap.me/u/solidone/z6-og-1...=1&data=1-5-12

Gas from the same gas station.... I cannot get over that...

Was the first log taken very soon after ecu reset or flash ?

The ecu aparantly does some calibration/analysis of the knock signal to try to eliminate background noise/vibration not sure how long this takes.

also their is a FLKC learned table like the wrx one below that gets populated over time. so initially you may see more knock untill these calibrations/learning has been done

or it just down to fuel, air temp and humidity

more info over at romraider link below, our ecu likely similar to wrx

http://www.romraider.com/forum/topic1840.html

[solidONE]

Originally Posted by steve99

Was the first log taken very soon after ecu reset or flash ?

No, the second log was toward the last of that tank of gas and I flashed the old PI% table at a bit before half tank, so the computer already had about a half tank of fuel (120 miles or so) to do it's thing and about 10 miles or so into the new tank of gas before I logged the 1st one in the above thread.

[Susurs]

Recently, I switched to E85 for testing purposes. The guy at the gas Station wasn't able to tell me whether it's really E85 or just about E70 because its winter here currently.

http://datazap.me/u/susurs/e85-logs?log=0&data=1 (right after switching to E85)
http://datazap.me/u/susurs/e85-logs?log=1&data=1 (after about 100 miles)
http://datazap.me/u/susurs/e85-logs?log=2&data=1 (after about 170 miles)

Without looking at the datalogs previously, I felt that the second run wasn't as astonishing as I expected it. When I look at the datalogs, it seems to me (but I'm no expert in that matter and that's why I'm asking you guys), the advance Multiplier going down confirms what I felt. During the third run however, it felt what others have written about E85.

The first datalog has been recorded right after filling in E85.

What do you think? Is it safe to drive around with these values? Is it worth to wait until I can expect real E85 coming out of the pump? I'm using Shivs Stg2 EL OTS 2 map. My mods are just a Cosworth air filter and a Invidia N1 exhaust catback (for the drive train).

[Rezi]

Hello

First time flash on Stage 1 (91oct) on A00G Rom.
Soft acceleration, no heavy loads, trying to keep it most of it in closed loop.

I really dont know if this is good or not. But all i can understand is to watch at the IAM/AFR/Knock Correction, they look good or not?

The log is across 35kilometer. 70% of it on the highway. Max 115km/h @ 2800-2900rpm.

How long do i need to keep it in closed loop?
And what after that? Which parameter do i need keep looking on?

Thank you so much!

http://datazap.me/u/rezi/stage-1-91o...&data=1-5-9-12

[JB86'd]

Originally Posted by Rezi

Hello

First time flash on Stage 1 (91oct) on A00G Rom.
Soft acceleration, no heavy loads, trying to keep it most of it in closed loop.

I really dont know if this is good or not. But all i can understand is to watch at the IAM/AFR/Knock Correction, they look good or not?

The log is across 35kilometer. 70% of it on the highway. Max 115km/h @ 2800-2900rpm.

How long do i need to keep it in closed loop?
And what after that? Which parameter do i need keep looking on?

Thank you so much!

http://datazap.me/u/rezi/stage-1-91o...&data=1-5-9-12

No apparent issues there. Next time when you log, log commanded AFR and FLKC. You don't really need KC Learned. You're driving at very low load and low rpm so it doesn't really tell us much. Once you've put 100km on it with the tune, you're good to open it up and drive it harder.
Take another log in 3rd gear if possible, Wide open throttle from 2000-7200.
If you can't, 2nd gear will do, but won't have as much data resolution.

[Rezi]

Thanks JB86'd

I'll give it a try and post the log tomorrow.

So i think the Fuel Trim Learning is over and now i need to see if there are any "problems" at higher rpm/load-range?

Unbelievable how the car changed. No vvt "rattling". "Nicer" sound overall of the intake/exhaust. Better throttle response. More low-end torque then before.

What was Subaru/Toyota even thinking...

[steve99]

Originally Posted by Susurs

Recently, I switched to E85 for testing purposes. The guy at the gas Station wasn't able to tell me whether it's really E85 or just about E70 because its winter here currently.

http://datazap.me/u/susurs/e85-logs?log=0&data=1 (right after switching to E85)
http://datazap.me/u/susurs/e85-logs?log=1&data=1 (after about 100 miles)
http://datazap.me/u/susurs/e85-logs?log=2&data=1 (after about 170 miles)

Without looking at the datalogs previously, I felt that the second run wasn't as astonishing as I expected it. When I look at the datalogs, it seems to me (but I'm no expert in that matter and that's why I'm asking you guys), the advance Multiplier going down confirms what I felt. During the third run however, it felt what others have written about E85.

The first datalog has been recorded right after filling in E85.

What do you think? Is it safe to drive around with these values? Is it worth to wait until I can expect real E85 coming out of the pump? I'm using Shivs Stg2 EL OTS 2 map. My mods are just a Cosworth air filter and a Invidia N1 exhaust catback (for the drive train).

Their was a bit of knock in the earlier logs, probably due residual petrol in system.

After 170 miles is looks ok, it appears to be reasnoble E85 as the fuel trims LTFT are only slightly negitive. This is likely due to the residual petrol in tank on switch to E85 even with fuel light on their is still almost 10 litres in tank.
looks ok will be better on second tank


if you have not already seen this here is link
E85 on stock car
http://www.ft86club.com/forums/showthread.php?t=67310