Speed Density FAQ

Treefiddy · **Joined:** Wed Jan 14, 2009 10:53 pm **Posts:** 11

Ok I pasted the code in my Ecu def. Now I'm getting an error message from romraider that the values don't add up.

My rom is a A2ZJ500J

It gives me this error when I changed the 14.3 value to 14.69 since I'm mostly at sea lv.

Here is the error that I get :

"The real value and byte value conversion expressions for table Manifold Pressure are invalid

To real value: x/750*14.5-14.6
To byte: (x+14.3)*750/14.6"

And it displays it 2 times.

Treefiddy · **Joined:** Wed Jan 14, 2009 10:53 pm **Posts:** 11

Well I tried to use the first code that freon used with out changing the pressure calculations at sea lv but still the table comes up with 5.000 values only and no axis values.

Still it opens up the bare bones "A2ZS710J: map with out any problems what so ever.

Im using Open xml editor 1.6 to make the changes to the ecu def.

deucex6400 · **Posted:** Thu Jul 16, 2009 9:14 am

So what's the status on the USDM 06 STI? This is something I've been tracking for a long time. I want to begin working on it for my car but it would be great if somebody has already started working on it and would like to share some information :mrgreen:

Remnex · **Joined:** Mon Feb 26, 2007 3:13 am **Posts:** 19

I want this so bad for my STI.

deucex6400 · **Posted:** Fri Jul 17, 2009 4:24 pm

I've done a lot of research into it and looked at how SD works on the 04 STI. I've been glancing over the Renesas manuals and there seem to be a lot of similarities between the 04 STI (512KB ROM) and the 06 STI (1MB ROM). I myself would love to get a working version for the 06 STI done, and possibly other ROMS, but I think I'm in the same boat as just about everybody else who understands it: limited time to actually work on it. My current roadblock is mapping out the ROM, but I'm learning a bit more about using IDA every day and getting a little closer as time permits.

Treefiddy · **Joined:** Wed Jan 14, 2009 10:53 pm **Posts:** 11

Deuce could you help me to implement this to my 04sti. I don't know what is wrong since I pasted the code on the 32bit database and in my respective rom section. When I open up my rom the speed density table shows up etc but I don't really know if it is working on my car or not because I removed my maf from its housing and the car just died.

I would really appreciate some help

deucex6400 · **Posted:** Mon Jul 20, 2009 1:14 pm

I honestly haven't touched the 04sti rom, as I've been working on dissasembling and understanding my 06sti to implement SD on my car sometime in the future. If I get some free time I'll see if I can figure out the cause of your problem.

fujiillin · **Joined:** Tue Feb 12, 2008 11:00 pm **Posts:** 153

Deuce, I've got alot of work done on the 06 wrx rom, and I started poking around in the 05 Sti before I got too busy to keep working on this. I'll try to compile my notes and any useful info I can find sometime this week.

deucex6400 · **Posted:** Mon Jul 20, 2009 10:54 pm

I spent some time playing around with the 04sti rom that Freon offers on his site and finally got the result in RomRaider that I was looking for. I used a local value of 14.4 instead of 14.35 originally used, and didn't have any issues loading the table. From what you posted, the conversion isn't consistent. Double check everything, you will likely find something missing or added in your def file as well (welcome to the frustrating world of programming). I'll attach my ecu def file that I have modified for personal use with RomRaider, I added in the SD info and removed all but USDM 06STI and 04STI, and the 32BITBASE definitions. Hopefully it helps more than it confuses, feel free to use it as an example. On a side note, I use SharpDevelop (I tinker with C#) to do my XML editing, I find that being able to collapse entire sections of the definitions helps a lot in moving stuff around, and it's free.

DEFS REMOVED. - ADMIN

merchgod · **Joined:** Wed Mar 29, 2006 10:38 pm **Posts:** 5256

Don't post modified versions of the official RR defs. We do not want old defs floating around in a thread somewhere that someone might confuse for the official defs after they are updated. Instead, create separate defs with only the speed density relevant tables. You can then add this to the ECU definition manager and modify the cal id for the SD ROM (not sure if Freon does this already) and it will open without modifying the official defs.

deucex6400 · **Posted:** Tue Jul 21, 2009 8:57 am

Not a problem merchgod, besides I found this post last night when I was re-reading through the thread, so that was a moot point anyways :oops:

Just replace "14.3" with whatever your local barometric pressure is.

root wrote:

FWIW, I added these to the ecu defs and it loaded right up.

To the 32BITBASE <rom>...

Code:

    <table type="3D" name="Volumetric Efficiency" category="Speed Density" storagetype="uint16" endian="big" sizex="12" sizey="18" userlevel="1">
      <scaling units="Volumetric Efficiency (%)" expression="x*.00007629" to_byte="x/.00007629" format="#0.000" fineincrement=".001" coarseincrement=".005" />
      <table type="X Axis" name="Manifold Pressure" storagetype="float" endian="big">
        <scaling units="psiG" expression="x/750*14.5-14.3" to_byte="(x+14.3)*750/14.5" format="#0.00" fineincrement="1" coarseincrement="5" />
      </table>
      <table type="Y Axis" name="Engine Speed" storagetype="float" endian="big">
        <scaling units="RPM" expression="x" to_byte="x" format="#" fineincrement="50" coarseincrement="100" />
      </table>
      <description>This map contains the volumetric efficiency table utilized by Freon's speed density code.</description>
    </table>

To the A2ZJ710J <rom>...

Code:

    <table name="Volumetric Efficiency" storageaddress="0x7E7E0">
      <table type="X Axis" storageaddress="0x7E768" />
      <table type="Y Axis" storageaddress="0x7E798" />
    </table>

akeric · **Joined:** Mon Jul 02, 2007 6:48 pm **Posts:** 48

So whats the word on something like this coming to a 07 STI rom near me?

gabedude · **Posted:** Wed Jul 22, 2009 8:20 pm

I might be buying IDAPro so you may get this from me. I am interested in it.

deucex6400 · **Posted:** Thu Jul 23, 2009 5:27 pm

You can get the freeware version of IDA (v 4.9) from doing a search on google, however I know it has some limitations. I haven't installed that version so I do not know whether or not the needed processors are supported, but if so then you might be able to save some cash.

For the others just picking it up, I've been reading through "Introduction to Assembly Language Programming" by "Sivarama P. Dandamudi" Second Edition alongside the SH2E Renesas manual (link to it is avail here somewhere), makes understanding whats going on a little easier for those who don't have a background in assembly. I'm sure there is probably a better assembly book out there, but that's just one of the first ones I found floating around on the net.

OT: gabedude, I'm running a tweaked version of the 06sti rom you released, I'm just up in Waco so environmental differences are negligible, runs great! :mrgreen:

gabedude · **Posted:** Thu Jul 23, 2009 5:37 pm

Yeah Tessa loves the way her car runs. Check this video out. I'll just say we were in 6th gear the whole time.

http://www.youtube.com/watch?v=l9STjNw_nQo

This one is good too, a bit more technical and Kevin has more track experience. The cars flat out were about identical in pull power, but he was not running full boost in his very light GC8 converted STi hybrid (EV03 16G with Ver 7 heads, forged 2.5L bottom end).

http://www.youtube.com/watch?v=ipQiMeUEvCo

The freeware version of IDA does not support the architecture of our ECUs. :/

-Gabe

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