Per Gear Max Requested Torque for 08+ WRX, 09+ FXT

eminehart · **Posted:** Thu Aug 04, 2011 10:19 pm

I just added pretty much every WRX ROM I know of and a few FXT roms.

MFB · **Posted:** Thu Aug 04, 2011 11:28 pm

Thanks Eric! :-)

Question now is how to utilize this for AT.

ggg0516 · **Joined:** Fri Feb 15, 2008 5:33 am **Posts:** 11

Does this logic exist for the 08+ STi? I would love to have this for my 2011.

dschultz · **Posted:** Fri Aug 05, 2011 2:32 am

ggg0516 wrote:

Does this logic exist for the 08+ STi? I would love to have this for my 2011.

It is there but the table is limited to 2 rows, 1st and 6th gear only. Maybe someone who tunes knows how to utilize it though.

eminehart · **Posted:** Fri Aug 05, 2011 2:53 am

In STI's its a bit Different. I'll define them here or maybe a new thread. I have seen them have 2 gears, stock it has 1st and 6th. Now you could set this up by sloping the requested torque between gears.
Well it depends on how this table is interpolated by the ecu. If it slopes the requested tq between 1st and 6th we are good
maybe set up your requested tq numbers in your wastegate tables so your last 6 rows correspond to the different gears. Say you setup 500 tq limit in 1st gear and 400 tq limit in 6th.
500 would be the column for 1st gear
480 for 2nd
460 for 3rd
440 for 4th
420 for 5th
400 for 6th
You could also use SI drive to switch boost maps but you would have to make new column's for a sports map at this point your boost map will be pretty filled.
There is also different requested TQ limit maps based on SI drive. The intelligent map only has 1 gear
Testing would have to done.

eminehart · **Posted:** Fri Aug 05, 2011 2:59 am

MFB wrote:

Thanks Eric! :-)

Question now is how to utilize this for AT.

Use it just like the MT's as I outlined earlier. I have noticed a 3 port is key to this tables effectiveness.
I just tuned a stage 2 WRX 2 days ago, 20 PSI in first gear!

td-d · **Posted:** Fri Aug 05, 2011 9:47 am

eminehart wrote:

td-d wrote:

Hi - any chance of finding this for the 08' EUDM / South Africa ROM - AZ1G201G / AZ1G202G ?

Nice find...

It's like most STI's 2 gears, 1st and 6th gear, I am not sure how useful this would be. and how difficult it would be to use it.

Hi - thanks - I actually started disassembling the Rom myself, and found the tables quite quickly - as with all the STI's, it is only 2 rows - 1 and 6. Have not yet started digging through the logic of the subroutines that call it.

throttlehappy · **Posted:** Fri Aug 05, 2011 10:29 am

dschultz wrote:

The only way to know is to log some yet undefined RAM locations. I'll see what I can dig up in that code area and if you wish we can test a few RAM locations for your ROM to see what appears.
I didn't see a 350 limit in that section but I didn't look at all of it either, it's a very long subroutine that processes four possible entry values.

Could it be possible to use a hex editor to find all references to the 'max' limited torque value as it would be likely that 350 is a very rare occurance value?

dschultz · **Posted:** Fri Aug 05, 2011 1:41 pm

eminehart wrote:

In STI's its a bit Different. I'll define them here or maybe a new thread. I have seen them have 2 gears, stock it has 1st and 6th. Now you could set this up by sloping the requested torque between gears.
Well it depends on how this table is interpolated by the ecu. If it slopes the requested tq between 1st and 6th we are good
maybe set up your requested tq numbers in your wastegate tables so your last 6 rows correspond to the different gears. Say you setup 500 tq limit in 1st gear and 400 tq limit in 6th.
500 would be the column for 1st gear
480 for 2nd
460 for 3rd
440 for 4th
420 for 5th
400 for 6th
You could also use SI drive to switch boost maps but you would have to make new column's for a sports map at this point your boost map will be pretty filled.
There is also different requested TQ limit maps based on SI drive. The intelligent map only has 1 gear
Testing would have to done.

What about changing the gear axis to 1 & 2 rather than 1 & 6?
Would this give you enough control over 1st gear and 2 and up would effectively be unchanged?

dschultz · **Posted:** Fri Aug 05, 2011 1:47 pm

throttlehappy wrote:

dschultz wrote:

The only way to know is to log some yet undefined RAM locations. I'll see what I can dig up in that code area and if you wish we can test a few RAM locations for your ROM to see what appears.
I didn't see a 350 limit in that section but I didn't look at all of it either, it's a very long subroutine that processes four possible entry values.

Could it be possible to use a hex editor to find all references to the 'max' limited torque value as it would be likely that 350 is a very rare occurance value?

Most likely the value is stored in IEEE 754 floating point format so a value of 350 would be represented by the byte sequence 43 AF 00 00.
In the 2010 WRX MT ROM I can find 14 occurrences of this sequence. So without knowing how the value is read changing any of them would be an interesting exercise of trial and error.

eminehart · **Posted:** Fri Aug 05, 2011 4:07 pm

dschultz wrote:

eminehart wrote:

In STI's its a bit Different. I'll define them here or maybe a new thread. I have seen them have 2 gears, stock it has 1st and 6th. Now you could set this up by sloping the requested torque between gears.
Well it depends on how this table is interpolated by the ecu. If it slopes the requested tq between 1st and 6th we are good
maybe set up your requested tq numbers in your wastegate tables so your last 6 rows correspond to the different gears. Say you setup 500 tq limit in 1st gear and 400 tq limit in 6th.
500 would be the column for 1st gear
480 for 2nd
460 for 3rd
440 for 4th
420 for 5th
400 for 6th
You could also use SI drive to switch boost maps but you would have to make new column's for a sports map at this point your boost map will be pretty filled.
There is also different requested TQ limit maps based on SI drive. The intelligent map only has 1 gear
Testing would have to done.

What about changing the gear axis to 1 & 2 rather than 1 & 6?
Would this give you enough control over 1st gear and 2 and up would effectively be unchanged?

It would work but the benefits are minimal if tuned this way. Sure, you get fast spool in 1st but you also don't spend much time there, getting optimal spool in every gear really will have an effect on acceleration.

dschultz · **Posted:** Fri Aug 05, 2011 8:00 pm

Or maybe set the gear axis to 2 & 3 then. Gear 2 and under read from the first row and 3 & up from the second row.
Experimentation will probably find the best compromise.

eminehart · **Posted:** Sat Aug 06, 2011 6:53 am

Here is the code for the 11 STI If someone can confirm that A is Sport and B is Sport Sharp that would helpful. Also that Requested TQ slopes between 1st and 6th, I can probably get my hands on one in the next few weeks.

Code:

   <table name="Requested Torque Limit A (Per Gear/Engine Speed)" storageaddress="DD724" sizey="2">
      <table type="X Axis" storageaddress="DD6DC" />
      <table type="Y Axis" storageaddress="DD71C" />
   </table>
   <table name="Requested Torque Limit B (Per Gear/Engine Speed)" storageaddress="DD7AC" sizey="2">
      <table type="X Axis" storageaddress="DD764" />
      <table type="Y Axis" storageaddress="DD7A4" />
   </table>

MFB · **Posted:** Sat Aug 06, 2011 9:56 am

For the sti 08 to 10, I just find a happy medium. I target 4th to be spot on and expect some overboost for 3rd. For 1st gear, you can add compensation. Usually helpful if you have LC enabled for the car.

dschultz · **Posted:** Sat Aug 06, 2011 2:47 pm

eminehart wrote:

Here is the code for the 11 STI If someone can confirm that A is Sport and B is Sport Sharp that would helpful. Also that Requested TQ slopes between 1st and 6th, I can probably get my hands on one in the next few weeks.

Code:

   <table name="Requested Torque Limit A (Per Gear/Engine Speed)" storageaddress="DD724" sizey="2">
      <table type="X Axis" storageaddress="DD6DC" />
      <table type="Y Axis" storageaddress="DD71C" />
   </table>
   <table name="Requested Torque Limit B (Per Gear/Engine Speed)" storageaddress="DD7AC" sizey="2">
      <table type="X Axis" storageaddress="DD764" />
      <table type="Y Axis" storageaddress="DD7A4" />
   </table>

I hope you didn't miss this post.
viewtopic.php?f=34&t=7487

These tables are read using the same routine as any other 3D table so linear interpolation should apply between cells. The result of each table (A & B) is compared to a couple of different RAM values to get the lower value. I'm not sure what these RAM values are or where they are set at the moment.

RomRaider

Per Gear Max Requested Torque for 08+ WRX, 09+ FXT

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