Mafscaling Utility - WOT Best VVT Help? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Joe-G · 09-03-2016, 04:14 PM

Wondering if I could get some tips from someone more versed with with utility? I've searched as much as I can, but some explicit yes/no/don't do that would be helpful.

Ive stumbled upon the mafscaling utility, and I'm trying to make the best out of my tune and utilize the WOT Best VVT functions.

After inputting my logs, and letting the utility to the calculations, I can see that my VVT tables are not too far off from the recommended values.

My questions are:

1. Do I input the recommended values in all cells for that rpm? Or, do I only input it for a specific load range? (ie. > 0.8?)

2. Do I need to gradually 'get there'? If that makes any sense? If the latter case if true for my first question, do I adjust the preceeding cells by values of 3-5?

3. Is it crucial to log and use 'Throttle angle (*)', NOT 'Throttle Positon #1(%)' for the 'Throttle Angle %' column? Looking at examples/screenshots here, Ive seen the use of 'Throttle Angle (*)'.

I'm trying to learn much as I can. Hoping I can nail this down for my current tune, and do it for my future header when I purchase it as well.

FWIW, not sure if mafscaling is crucial for vvt? but my logs show ~5% or less for LTFT.

Any help would be appreciated! Any do's, don'ts, and things to watch out for would be super helpful.

Kodename47 · 09-03-2016, 08:04 PM

Seeing as that was my idea I guess I'll answer your questions.

1. Don't change the whole table. You're obtaining results for WOT operation so only change that data. You'll see that the OEM tables are the same above a certain load, I would be inclined to just replicate that.

2. After you've done the above if, for example, you are always above load of 1 then you could adjust the previous column to interpolate the values. This is not required though, if there is not a jump of more than 10 degrees then you could just not bother.

3. Throttle angle/%/Accelerator angle will all do the same thing, it's just to filter the WOT data from the logs.

MAF scaling isn't crucial, AFRs will move around a little due to the cams. My only advice is to do one set of cams at a time. I would also try and produce the runs in the same gears.

makinen · 09-03-2016, 10:28 PM

Hi.

As I experienced with that tool, you need to monitor real cam angles after adjusting AVCS tables.

Even not a big jump in the table, the inter/extrapolation of cell values could make the angle differ from the one you wished. And also consider delta angle/delta time is not changed much in a short time.

This is what I experienced.
Thanks for a good tool, Kodename47 and vgi!

09-03-2016, 08:04 PM	#2
Kodename47 Senior Member Join Date: Oct 2012 Drives: UK GT86 Location: UK Posts: 3,040 Thanks: 185 Thanked 1,633 Times in 1,113 Posts Mentioned: 156 Post(s) Tagged: 1 Thread(s)	Seeing as that was my idea I guess I'll answer your questions. 1. Don't change the whole table. You're obtaining results for WOT operation so only change that data. You'll see that the OEM tables are the same above a certain load, I would be inclined to just replicate that. 2. After you've done the above if, for example, you are always above load of 1 then you could adjust the previous column to interpolate the values. This is not required though, if there is not a jump of more than 10 degrees then you could just not bother. 3. Throttle angle/%/Accelerator angle will all do the same thing, it's just to filter the WOT data from the logs. MAF scaling isn't crucial, AFRs will move around a little due to the cams. My only advice is to do one set of cams at a time. I would also try and produce the runs in the same gears. __________________ .: Stealth 86 :. Abbey Motorsport/K47 Tuned Sprintex 210 Supercharger Kodename 47 DJ: Soundcloud / Instagram / Facebook

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09-03-2016, 04:14 PM	#1
Joe-G Canada Eh! Join Date: Nov 2013 Drives: '13 FRS Location: Calgary, AB Posts: 447 Thanks: 156 Thanked 231 Times in 120 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Mafscaling Utility - WOT Best VVT Help? Wondering if I could get some tips from someone more versed with with utility? I've searched as much as I can, but some explicit yes/no/don't do that would be helpful. Ive stumbled upon the mafscaling utility, and I'm trying to make the best out of my tune and utilize the WOT Best VVT functions. After inputting my logs, and letting the utility to the calculations, I can see that my VVT tables are not too far off from the recommended values. My questions are: 1. Do I input the recommended values in all cells for that rpm? Or, do I only input it for a specific load range? (ie. > 0.8?) 2. Do I need to gradually 'get there'? If that makes any sense? If the latter case if true for my first question, do I adjust the preceeding cells by values of 3-5? 3. Is it crucial to log and use 'Throttle angle ()', NOT 'Throttle Positon #1(%)' for the 'Throttle Angle %' column? Looking at examples/screenshots here, Ive seen the use of 'Throttle Angle ()'. I'm trying to learn much as I can. Hoping I can nail this down for my current tune, and do it for my future header when I purchase it as well. FWIW, not sure if mafscaling is crucial for vvt? but my logs show ~5% or less for LTFT. Any help would be appreciated! Any do's, don'ts, and things to watch out for would be super helpful. __________________

09-03-2016, 10:28 PM	#3
makinen Senior Member Join Date: Jan 2013 Drives: Toyota 86 Location: South Korea Posts: 278 Thanks: 138 Thanked 221 Times in 126 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	Hi. As I experienced with that tool, you need to monitor real cam angles after adjusting AVCS tables. Even not a big jump in the table, the inter/extrapolation of cell values could make the angle differ from the one you wished. And also consider delta angle/delta time is not changed much in a short time. This is what I experienced. Thanks for a good tool, Kodename47 and vgi!

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