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It looks like there is no temperature drop between IAT and IAT2. My logs all show a temperature drop across the ic not a rise. I don't know if it makes a difference in this case, but it is something...

I apologize if I came off wrong. It was not my intent to insinuate that you are a noob. I just wanted to pass on my experience so you know a little KR is not unusual on an LNF and what I did to...

I don't know if this will help you since shabby is correct; some LNF knock more than others. Where I live, pump gas seems to top out at 91 octane. I initially had small knock all over the chart. I...

Well, setting aside from the fact that there is no 93 here in CA and all the gas contains up to 10% ethanol, E30 is just a step on my journey. I didn't go straight to 2:1 because I am carefully...

Thank you for that. I've just built myself an ethanol tune and this calculator validates the veracity of my calculations. I blended 11:4 E10:E85 for E30. Looks like I was right on the money.

You should do your own timing tables. If you accidentally picked a timing table that someone has tuned for E47 (half ethanol), you will have way too much advance. This can be unsafe for your engine....

Oooh, I didn't realize you weren't actually looking at a scan. Good deal. I should think that many of your <unsupported...> errors disappeared after it was able to pull the valid sensors information.

When you open either the sensor or the PID config screens, the ones you have available to you are highlighted. PIDs based on sensors you do not have will not work. I've attached the list showing...

Construct LT+ST PID and add to histogram


Open VCM scanner. (or close scan from Scan>Close Log File if already open)
Click Display>Histograms to get Histogram table to open.
Click...

I'm thinking from your post that you may be going about it the wrong way. The user-defined PIDs are calculations based on available sensors. There should be a little question mark button to click so...

It helps to double-check the PIDs for histos that do show. I had trouble when I started because I assumed a histo was right. Once I checked the PID for it, I found it was wrong.

It would seem to me that even if your MAF cal table wasn't entirely calibrated, the correction table would still push your trims closer to zero. I'm concerned that we are doing it wrong. I start with...

I've had plenty of practice with the MAF tuning as I have changed the lid on my airbox a few times. (full, lifted, half) My trims are looking pretty good now. Sometimes I would skip a log if...

If you are very close on the MAF frequency table, you would proceed to paste by %-half from the MAF base scan to the MAF base table in the editor to make the correction for varying load areas. I've...

I'm going to have to agree. Roll-on throttle rocks on an LNF. Jabbing the throttle results in a lag feeling instead of a rollercoaster feeling. I don't care though. I like it for what it is. I want a...

Exactly. The 'closer to zero' thing refers to the STFT and LTFT logging as closer to zero in the scanner after each paste special % to the MAF calibration table (MAF Airflow vs Output Freqency Table)...

The numbers in MAF cal in the editor aren't fuel trims, they are a definition of how much air is passing the MAF. My numbers in the editor go up too when I multiply by a positive trim %.

In the scanner, did you make sure you have Average selected for the MAF calibration histo? (The "A" in the upper right) If you select "+" or "C" while looking at KR, for example, and then switch back...

Rob here. I'm an IT support specialist by trade and MS certified as Server Administrator. (MCITP) Obviously, I couldn't resist getting a program to do more programming. I've had a lot of fun with...

If you mean write entire, I think you just need to write calibration from the stock file back to the car rather than write entire. There is no shame in starting over. I have also suffered occasional...

I'm on the same beta as you. While you technically can just use the file I created by importing it, you should first figure out what is causing your technique to result in incorrect numbers before...

I have exported the MAF calibration table for stock after applying the special paste by percent. (and attached to this post) Open a copy of your stock tune and import the attached file into your...

I got some wacky fuel trims when I started out doing it wrong. There ended up being an incorrect PID setting in my config rather than any issue with the car.

If you can post the first log you did with it stock, I'll post up images of the numbers I get by applying the first adjustment and how I did it. Then you can work on it vs what I got so you'll know...

I think you're mostly all set with the starter config file. When you start adding in histograms for other stuff you want to track, you may need to add the PID which contains the calculation for data...