Here are some datalogs performed per TwistedTuning's instructions:
ok, checked those logs out. and you probably already know this, but of curse there is a good amount of room for improvement. Although your trims aren't super off like some I've seen. they could still be dialed it a bit better, but nothing substantial there. Its to be expected by having a different intake than what that tune was calibrated for.
And yes, as I stated earlier about your AFR dropping to 234afr, that's completely normal. and happens on deceleration enleanment.
The timing corrections..... a little much for my liking. on the WOT pulls, I feel the fueling could be richened up slightly during spool and in the beginning of the midrange.
Long story short, it could use some tweaking, but I would like to also know if those timing corrections happen all the time or are they more sporadic?
hmm so it seems like without digging any further by me that COBB OTS tunes consistently pull -3 timing. your logs are like the 6th person logs ive seen where its pulling -3 degrees.
I haven't done any proper logs, but I usually get a -3 pop up under "Knock Ret." Is this bad? Could it just be gas quality causing knock? It happens randomly. For example, I drove 50 miles today without any timing retarding happening.
Also, how do I know if my fuel trims are okay? I have LTFT and STFT displayed. Can anyone give me cliff notes on each of those readings and what they mean. When the reading is over 1 means I'm running lean, and <1 is rich? My LTFT stays around 1.03 or so and my STFT is usually around there as well, but can jump up to 1.10 sometimes.
yes you are correct in your understanding of how the fuel trims read. 1.08 means the ECu is adding 8% fuel in that area. 0.88 means the ECU is taking away 12% fuel in that area for example. A value of 1 in the trims means the car is happy and for the most part that part of the calibration (tune) is on point.
Yeah I am certainly not very impressed. I don't know how much additional it will cost to tune out these knocking issues.
As someone who is looking into and researching COBB for my first tune, these are two huge open and unanswered questions that could sway potential buyers. Anyone have more specific answers to these questions?
The first is huge coming from NY and the second one would be great towards providing security to avoid a TD1 flag.
just be aware, that these car have similar timing corrections in stock unturned form. so with that ever timing correction you see, is not necessarily a bad/engine damaging correction event. Some of it can simply be engine noise. Knock corrections you want to pay attention to and be concerned about are those that:
1. show consistency in where and how they happen (same boost, throttle, rpm, and etc)
2. corrections that happen across multiple cylinders at the same time (generally more than -3)
3. spikes of over -3. so if you see something like -4 or -5 or something high like that. its something you may want to look into.
timing corrections can be a result of actual knock/detonation, IAT correction by the ECU, coolant temp correction, and also LEARNED correction factors. Yes, these cars learn to an extent for continuous knocking events. Just keep monitoring your car, if you see something alarming or just have a question. Post up a log, or don't hesitate to drop me a PM or email. if its something your very concerned about, I'd be happy to work something out you all. I'm here to help.
Try to also start getting into the habit of using Datazap to upload and share logs. Nice app, that helps you visualize the log better and easy sharing.
@littleazn248 I uploaded one of yours so you can see, haha.
http://datazap.me/u/twistedtuning/3rd-gear-pull?log=0&data=1-3-6-7-11-12-13-14-19