MS3 MAP setting FYI
 

In case this happened to anyone else. At some point while upgrading my firmware I did not realize the MAP sample settings had changed.

Mine was set on "use event min" instead of "Use event average". it appears to have been causing a stumble here and there at idle.

Props

good to know. I'm jumping from an older beta (pre1.1 b24 IIRC) firmware to the 1.2.0 release this weekend.

Make sure you convert your old mat correction table values to new table. Also need to change your boost control from inverted to normal, or whatever the setting is called.

well crap!

I need to go over change logs I suppose.

Can you quickly explain the differences cause im too lazy to search?


Another thing I'll be doing is joining the "incorporate AFR" club once I install the MS3pro, as I've been told the way we've been typically tuning the VE Table without it, while it works, is old, dated, and harder to tune.

OK, you explain to me the "incorporate AFR" and I'll explain the other changes.

Boost control: Higher duty now equals higher boost. Most of us ran our settings "inverted" so that this was the case anyway. The code has now changed that you need to switch from "inverted" to "normal" in the boost control settings.

MAT correction: The gas law, and correction factor are no longer behind the scenes. The default values in the table represent the gas law with a 100% correction. We corrected away from this by using 50% correction and adjusted the MAT correction table to make Gair 100. If the new default table is 110% at 60 degrees and you were using a correction factor of 0 on your old table at 60 degrees. then the new table value should be changed to 105% if you were using a 50% correction factor. If you had been using a plus 1% correction in the MAT table with a 50% correction factor then your new value would be 106%.

As stated earlier, use the "Use event average" as your MAP setting.

I also want to say that there has been a change to the accelerator enrichment resolution. I think the increments are finer.

I believe these were the major changes that would have a serious impact on your current tune if you updated the firmware and didn't know about the changes.

From digging around, the technical explanation by jsmcortina is:
http://www.msextra.com/forums/viewto...=44790#p318988

What it translates to in plain English (to the best of my understanding), is by including your AFR table in the calculation for the VE table, once you get your VE table tuned properly you can change your AFR and the ecu can automatically adjust without needing to re-tune the VE table.

In other words, if you tune your boost range for 11.0 AFR, and get it dialed in with Incorporate AFRTarget, you could later change it to 11.8 and the ecu would automagically know what values are necessary and would immediately change the AFR to 11.8 without having to run auto-tune again.

That's how I understood it to work, someone correct me if I'm wrong.

If I'm right, it's probably a good idea to turn it on. Only downside is it means re-tuning the entire VE table.

I'm going to quote myself here:

I'm going to have to start from scratch, but it should be easier to demand any targeted AFR once tuned.

simple enough, probably cause everyone complained about the way it was written, as it was the wastegate duty, not the solenoid duty.

Okay, that makes sense, it's more like a ASE or Warmup table now with the total correction number.

the accel-pump? I'm already using that.

Huh, I'd missed that part.

It's official. The MS3 is now the coolest ECU ever. :D

I've never used it, cause I always thought it was something that would be used best with narrowband target 14.7 most of the time, but apparently Ken and James both think I'm stupid for not using it.

but that's the idea, once the VE table is populated, any change in AFR demanded is as simple as changing the AFR targets becuase of the algorithm.

You want to hit 16 in cruise instead of 14.7, change the targets, the end no additional tuning required. Getting your initial VE table with VEAL works as normal.

I was under the impression the MS2 can use it also.
:Still has MS3 envy:

This is really cool and exactly how maf based subarus (basically all of them including yours) have it set up.

Once you set up your fuel table once, you're done.
The rest handled with mass airflow scale.
If OEM's do it, I'm sure its not dumb:party:

Doesn't matter. MS2 will never be as cool as MS3, because good is dumb.

I was acutally going to suggest you tune your ms3 in this method. But it's currently not setup that way. you'll have to completely retune the base fuel map.

good thing is, as more of us start moving over to it (I think a lot of Reverant's customers are) we can probably share VE tables to get similar motors "close" to start out with.


i believe this feature has been available in ms2 for a few years now.

https://www.miataturbo.net/attachmen...ine=1357849982



BIG QUESTION: if my car is sold (but still in my posession), do I bother updating this stuff?

The more I read about this incorporate AFR target the more I feel the dumb for not using it earlier.

I like the idea of tuning boost at a very safe AFR and then not having to run the gauntlet of slowly tuning leaner and leaner, just change to your desired AFR and bam, done.

Same for cruise/economy tuning.

I know teh feel.

Well I told you at least one time that I use it for like 3 years now and really like it...

https://www.miataturbo.net/megasquir...problem-66118/

Here I had a very dumb selfmade problem -

:loser:

I was confusing that with multiply map in that discussion :) but still, the way I read about it at first made me assume it was something that people using NB sensors were doing or something. I never really saw much discussion on it msextra, or ever saw fuel maps that were tuned with it, so I never learned about it.

it wasn't until, *cringe*, techsalvager kept bring it up recently where I started doing more reading on it, and talking to Ken and James and realizing it was probably something we all should be doing.