Data Logs! Post them here.
 

I seen the GTR guys had a nice spot to upload and view Data logs from different types of tuners. Ecutek,Cobb and so forth.

I figured we have a ton of tuning options now and a lot of e-tunes. Not everyone knows about tuning and is putting there trust into e-tunes and different Vendors. Myself included.

I figured instead of just posting this I would go ahead and post my current logs that I have sent in to be looked at.

Since I couldn't upload the CSV files directly I put two logs into a zip file and attached it.

Currently the two logs have -2 knock and one with -3 knock. cruise logs I will be flashing back to stock tonight until its taken care of.

good idea, i think if we can try and stay impartial and not attack tuners it will be an opportunity for all of us to grow our knowledge. I'll post some of my logs in a bit both for pump and E85.

This... Also if you see something in the log that does not look correct. Please call it out. Not all of us know what we should be looking at. And it would help not to have comments like that tune sucks. Or I can tune better. If something is wrong say exactly what you think is wrong with it.

here are a couple 3rd gear street pulls, same stretch of road on 93 pump gas. This is my own tune. based on my 93 pump tune but i now have the following mods:

Fa20club.com 4-1 long tube (currently with cat, soon to be without)
nameless over / front with cat and helmhotz
custom ft86speedfactory varex catback

Varex is in the open position for both pulls. This tune is essentially my last pump gas tune with cam timing and fuel map revisions for the headers. If you look closely you can see that i am trying to dial out some overlap where the leanspot shows up at 3200 rpm.. also the injection volume will show why i think it is overlap causing the lean spot... as it is consistent with load.

here is a log driving around log on E85, lots of wot, no knock correction. This was one of my last E85 logs before switching back to pump-gas a couple weeks ago for the header. After doing my E85 dyno tune, i never see anything greater than a -1 once in a while for feedback knock correction, mostly on roll in to throttle. My timing is a little conservative but based on when i stopped seeing gains on the dyno.

Just a word of warning to folks, I have seen several times now (as have others), the car gets knocky on low fuel. At least with pump gas. If you are seeing lots of knock correction, low IAM, or low learned correction, make sure you are on atleat 1/2 tank and get another log after filling up if not.

I will post my e85 logs here shortly. I have had great looking logs with e85 however over the last month I started to get weird check engine light codes. Which we have spoken about before. So back to pump gas.

This is good stuff! Unfortunately, I do not have anything to share at the moment, but I would love to see some forced induction logs.

Here are some more logs I just went out and did. I have a couple cruise logs. One of the cruise logs has 4 -2 knock events. some of the cruise logs had no knock events. and the 3rd gear to red line pulls had no real knock events.

So I'm at a lost how one cruise log can have bad knock events and others don't. or the 3rd gear pulls why are they not knocking like the cruise logs?

@mad_sb I did shut the car off when I was all done and turned it back on right away not even a 30 second gap and the IAM value completely reset.

Different temperature or gas station? Could be switching to winter fuel mixes where you live..Solid engine mounts?

Just ideas without looking at the logs. Take it for what it's worth.

Well the logs I just did now is the same temp and same gas station and has been for a while.

Just a thought on this. It's possible that the knock/lean is related to the saddle in the gas tank. A lot of the FI guys are getting fuel starvation issues at half a tank or lower. Maybe this is the way it's manifesting for the NA guys.

I thought i was having a fuel starvation issue too. right at 3500 rpm, if i have the pedal to the floor, car just bogs down and starts jerking. 3-6th super noticeable. I was hoping it was just a fuel thing, but just filled up and still same issue, car is barely driveable.

Logs from 1/4 tank.
https://www.dropbox.com/s/fesnlpg5xb...uartertank.zip

Logs after full tank.
https://www.dropbox.com/s/uhynp1se4y3znsq/fulltank.zip

I'm not the best judge of these things but I know -knock 5 is not good.

Do you have an aftermarket intake?

How is your AFR gauge in those situations? Do you see it climb 13-15? That sounds like one of my FP install issues. I can't open the logs at work, but yeah -5 is bad.

Here are my God awful logs before switching tuners... Notice the -5 knock events. Cruising, WOT, everywhere, didn't matter.

https://lh5.googleusercontent.com/-f...2520%25231.PNG

https://lh5.googleusercontent.com/-f...2520%25231.PNG

https://lh6.googleusercontent.com/-1...2520%25232.PNG

https://lh5.googleusercontent.com/-H...2520%25234.PNG

Got a new file in over the weekend. Still a tad of knock but much better. Knocked once over a two mile drive to work. at low rpms low throttle. Logs are attached. @mad_sb here is a pic of the IAM value resetting from .94 from before I cranked the key to .7 on start up.

http://imageshack.us/a/img404/7600/agsi.jpg

can we not just post the .csv files? that would be a ton easier

Yup.

Perrin

I will need to take a look. Here is the thing. I flashed back to the old tune, prior to my last one, and that issue is gone, so seems to be a tune issue? I will post logs of the "old" tune later today.

It might have something to do with your tune and intake combo.

Site only accepts .zip, what people do is post a .csv, change the extension to .zip and then you download it, change it to .csv and it opens in your computer.


Might be, true but since his "old tune" does not show the behavior seems to be isolated to that specific tune.

True, it's somehing changed in the tune, but i had a similar issue in the past at a lower rpm. It was intake related, but only happened at wot, and caused the same issues. My tuner later tuned it out.

Exactly what i was thinking. I was really hoping it was a tune issue and not an engine, connection, etc.. issue. I went through all the engine double checking all my hoses, connections etc.

Everything looked solid and secure...

So my next thought was it was that wacky tune. Flashed back and sure enough, running much better.

I will post logs soon, but from what i saw running the old tune yesterday, my knock correction was at least only a -2 at the most. So a bit of an improvement.

Its weird, and something i dont notice all the time, especially since i dont really drive around WOT usually. Only noticed while doing the datalogs...

Got an appointment on Monday with my tuner, hopefully we can resolve all this, if not, its off to Toni at FA20 for a remote tune.

It will take a little bit for your tuner to work on it, but from what i recall it's an issue with the maf placement in aftermarket intakes. Under wot the fueling switches to open loop and floods the engine with way too much fuel (simplified answer). @mad_sb might be able to shed a little more light on it.

A little bit....what would you consider a little bit? My tuner has had my car for around 20 days total. Shouldnt that be enough time to work out any bugs and get it tuned properly? Or is this car just too new?

My tuner has actually said he doesnt really want to tune twins anymore after working on mine and a couple others...says they are just too hard to tune, and the software is a pain. Is the consensus that this is true? Or is my tuner maybe just not a good fit for me and my car?

Thoughts. Hope to not derail the topic too much.

Tuner is not a good fit for your car or any of the newer management systems. They are not a difficult car to tune, especially if you are not doing it remotely.

This. The tuning process can be a little bit of a learning curve for people unfamiliar, but the better tuners will pick it up easily enough. The other issue is the speed of flashing. You can tune other platforms that offer live tuning 3 to 4 times faster than the current solutions on the market for us.

Ok, here goes. As the original post suggests, I am one who has very little tuning knowledge and have such have placed my faith in a couple of Ecutek tuners. Attached is a log from each and any interpretation by those who know about these things would be appreciated. :cheers:

Attachment 53644

Attachment 53645

Ok, so just got a new tune, and while my tuner assured me its all dialed in, want to post and get everyones opionions. Biggest thing, is before i had pretty much "0" knock correction all the time. Now i am getting swings of -1/-2 or so at WOT every once in a while.. It has hit -4 once as well.

Does that seem right?

My tuner said that since im running e-85 shouldnt really be a concern.

Here are some logs...
log one shows the knock correction, second log has none, as its not all the time.

2-4th WOT

3rd WOT

Bump?

I will take a look tonight but a fi guy shou since you are turboed.

Yeah thanks. I do think an FI guy might have more insight. Hard to say, as I am just starting to understand these logs. So not sure if there is a big difference between NA or FI logs.

The first log didn't seem like a 2-4 gear pull. just a normal 3rd gear wot pull. However you had some nice knock in it. it wasn't just tip in knock.. it looked like it was at -2knock for sometime and it was pulling timing.

The first -2 knock event lasted damn near 500 rpms worth of knock.

The 2nd -2 knock event last a long time. Lasted from 3500 rpms till red 7300 rpms and then stopped knocking. that seems to be a long time for one long knock event at wot.

For me i have had -2 knock but its been at crusie and at really low rpms and low throttle input. throttle tip in knock. I think the first knock event you had was that but the 2nd really bad one im not so sure.

Got a couple good 3rd gear pulls today.. went to a long stretch of road with no traffic about 45 min from home. I could only get to just below 7000 because the road starts turning :)

This is my first ECUTek tune.. my tuner will be reviewing my logs and sending me an updated tune. hopefully soon.

Mike

I don't understand the dip in throttle position.. I had it WOT up to 7000. Is physical throttle position different than this parameter? I see a correlation with ignition timing, but I don't know what that means.

If you look at engine load its doing the same thing. Ill look at mine tonight and see if its the same. Weird but maybe not

there's a lot more than just throttle position that goes into calculating target throttle plate angle in any given situation. a simplification is to say that requested torque is resolved from a 3-dimensional map of accelerator pedal angle and rpm, which is then used in another map to look up a target throttle plate angle. in reality it's more complex than this, with other maps involved that i don't understand. point being you can't expect a steady input to result in a steady output.

Here is mine

Jr tuned
Full Blown e85 tune

Idle
Cruise
3rd Gear Pull