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Old 01-03-2013, 09:23 PM   #1
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Default Any new MAT correction trickery

Or is everyone just converting the new table to incorporate their old values?

As I read it:

To get your old values into the new value. Lets say at 45 degrees F

Your old value is 99% or -1%

The value in the new table is -110%

Your old MAT factor is 50%

old value in new tabled would be -104%

.5 % 10% = 5% minus the 1% that was being pulled via MAT correction table.
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Old 01-03-2013, 09:57 PM   #2
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did they make a change to it or something?
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Old 01-03-2013, 10:10 PM   #3
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in the latest stable release they put the MAT correction factor and table into a single table. When you install the firmware your MAT correction table goes away and you get a default table that represents the ideal gas law with a 100% factor. You then have to convert the new values to your old values.

Megasquirt MSEXTRA / MS3EFI • Air density - expose calculation (View topic)
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Old 02-19-2013, 05:34 AM   #4
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I just made myself comfortable with the new "exposed" MAT correction.

I made myself an Excel spreadsheet, with the standard values of the MAT correction, the 50% correction values and my old correction empirical values...

Look what I get as an resulting line...



The resulting line nearly equals out all the corrections... (and the -40C and -20C values are estimates...)
I think this is interesting... (and how often did I read here - "we need to zero out the corrections..." - I think Brain is telling this since ages...)
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Old 02-19-2013, 09:47 AM   #5
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I posted that a while ago:


default curve:




What a "50%" reduction would look like:




What I'm running:




looks like our end results are very similar.

Basically the table is total corrections table now, instead of before where the table was a corrections table for the built in corrections. It makes much more sense to have it the current way.
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Old 02-20-2013, 03:56 AM   #6
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Oh must have missed this - but nice to see, that you get nearly the exact results...

Someone else did this comparsion? Rev?
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Old 02-20-2013, 09:12 AM   #7
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I just plugged in numbers I thought would be a good starting point
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Old 05-21-2013, 06:09 PM   #8
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Can someone help me undumb myself. I cant for the life of me find the MAT correction table in tunerstudio. Where should this be? I tried turning off all enrichments when I started tuning, is there a way to turn this off? I bought the upgraded TS for my laptop and do not see it on here. I do see the menu on my nonupgraded TS on my desktop.
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Old 05-21-2013, 06:34 PM   #9
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Don't mention which MS you have or firmware version.
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Old 05-21-2013, 06:47 PM   #10
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MS3x
ms3-release-1.2.1
TS v2.0.8
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Old 05-21-2013, 07:54 PM   #11
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From ms3 1.2.2 beta:

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Old 05-21-2013, 08:16 PM   #12
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Yup just dumb. I swear I checked all of that submenu, o well. Thanks for the help!
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Old 10-09-2013, 05:32 PM   #13
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Forgive me for necro'ing this thread, but I am wondering if we have found a better MAT correction curve since then? I am kinda battling this right now and am about to plug in Brain's curve to hopefully stabilize my VE table.
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