CustomCode - Ign Retard 2-Step / No Lift Shift

liubchy · **Joined:** Tue May 12, 2015 1:47 pm **Posts:** 43

KO is activated if pressure is in acceptable range.
http://drive.google.com/file/d/1FqFmSV3 ... p=drivesdk

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mrf582 · **Posted:** Fri Jan 03, 2020 10:48 pm

Nice work!

So per your testing and the factory manual, here's as I understand it.

S_KO = Input = 'A/C Pressure Sensor switch' (originating from HVAC module)
S_AC = Input = HVAC module's AC Request signal (probably not straight from the button)
S_REL = Output = A/C Relay (toggles to ground to enable)

I wonder if these 2 inputs are also normally at 0V so you have to provide 5V to them to get them to toggle. Much like the ASC module. Better electrical design this way, actually. But, then we have to find ways to get 5V power, lol. But it does look like we can add these to the list of switches we can hook custom s*** on to.

The output can have any use but the first one that came to mind was a nitrous switch tied to TPS as measured by the ECU. Then you can set certain RPM/Load ranges that if the TPS values exceeds a limit, then nitrous kicks in. I guess we could do that with the SAP relay or solenoid too.

sorek · **Posted:** Sat Jan 04, 2020 1:02 am

Is it possible to control from one of those pins to use different map for ignition?

Eg. when we LPG for higher octane levels.

mrf582 · **Posted:** Sat Jan 04, 2020 5:09 am

Yes... Here's the plan for the 3 that are already in the code (MS41.3).

Code:

<table type="2D" name="Ignition Cut RPM Limit" category="Ignition Cut Rev Limiter" storagetype="uint8" sizey="1" storageaddress="0x33C5" > 133C5 mem 33C5 cal
   <scaling units="RPM" expression="x*32" to_byte="x/32" format="0" fineincrement="1" coarseincrement="10" />
   <table type="Static Y Axis" name="Ignition Cut RPM Limit" sizey="1">
      <data>Maximum</data>
   </table>
   <description>If RPM > Ignition Cut RPM Limit, enable Ignition Retard</description>
</table> 
<table type="2D" name="Ignition Cut RPM Limit - Retard" category="Ignition Cut Rev Limiter" storagetype="uint8" sizey="1" storageaddress="0x33CC" > 133CC mem 33CC cal
   <scaling units="Retard %" expression="(x-255)*(.391)" to_byte="(x/(.391))+255" format="0" fineincrement="1" coarseincrement="10" />
   <table type="Static Y Axis" name="Ignition Cut RPM Limit - Retard" sizey="1">
      <data>Multiplier</data>
   </table>
   <description>If RPM > Ignition Cut RPM Limit, Ignition Timing ("Ignition Timing Base" + 24 degrees) will be multiplied by this value.</description>
</table>
<table type="Switch" name="Switched Ignition Retard - Switch Input" category="Ignition Cut Rev Limiter" sizey="1" storageaddress="0x33DA" > 133DA mem 33DA cal
   <state name="Enabled via ECU Pin 80" data="01" />
   <state name="Enabled via ECU Pin 81" data="02" />
   <state name="Enabled via ECU Pin 82" data="04" />
   <state name="[Disabled]"             data="FF" />
   <description>Select which Pin will get Switched 5V.</description>
</table>
<table type="2D" name="Switched Ignition - Retard" category="Ignition Cut Rev Limiter" storagetype="uint8" sizey="1" storageaddress="0x33FC" > 133FC mem 33FC cal
   <scaling units="Retard %" expression="(x-255)*(.391)" to_byte="(x/(.391))+255" format="0" fineincrement="1" coarseincrement="10" />
   <table type="Static Y Axis" name="Switched Ignition Retard" sizey="1">
      <data>Multiplier</data>
   </table>
   <description>After "Switched Ignition Retard - Switch Input" is selected for either Pin 80, 81, or 82, tune this table as needed. Ignition Timing ("Ignition Timing Base" + 24 degrees) will be multiplied by this value.</description>
</table> 

Fabio · **Posted:** Fri Jan 10, 2020 9:07 pm

Great work!
How is going project?, extremaly interested :twisted:

mrf582 · **Posted:** Fri Jan 10, 2020 10:46 pm

Here's an update on Ignition Cut. It works!
https://sites.google.com/site/openms41/ ... nition-cut

titiz · **Joined:** Sun Mar 11, 2018 2:15 pm **Posts:** 4

mrf582 wrote:

Here's an update on Ignition Cut. It works!
https://sites.google.com/site/openms41/ ... nition-cut

Thank you, :lol:

Mr. mrf582, bravo, for your work and passion. I will soon test and send you a return. I'm going to first unbrick an MS41.0 373 and switch it to 41.2, I just desoldered the eprom and I managed to read it. I will create a new post. :wink:

mrf582 · **Posted:** Sat Jan 11, 2020 4:33 pm

An awesome video has been attached to the page on Ignition Cut. And holy hell, it is aggressive! Credit for video goes to rossi.
https://sites.google.com/site/openms41/ ... nition-cut

dx4picco · **Posted:** Sat Jan 11, 2020 7:36 pm

Congrats!

I'm not going to hit my cats with that :lol:

mrf582 · **Posted:** Sat Jan 11, 2020 7:43 pm

Yeah, me neither

328i-sport-rossi · **Joined:** Tue Jan 24, 2017 11:58 am **Posts:** 478

mrf582 wrote:

An awesome video has been attached to the page on Ignition Cut. And holy hell, it is aggressive! Credit for video goes to rossi.
https://sites.google.com/site/openms41/ ... nition-cut

It helps having a full stainless decat system

so far so good, the work the guys have put into this coding has opened up a whole new level, Hats off to mrf82 and busterhax to name just a couple.

RK4000 · **Posted:** Sat Jan 11, 2020 11:53 pm

Holy cow, that's aggressive as hell... Nice work!

Lambda1 · **Joined:** Sat Jan 14, 2017 9:46 pm **Posts:** 534

with cat... and I say "bye bye" meme :lol:

.
Nice but nothing for my supercharger

, need to get my hand again at an another NA M52.

Johnny_B · **Joined:** Thu May 28, 2015 5:27 pm **Posts:** 87

Does your code working with AT cars?

mrf582 · **Posted:** Sun Jan 12, 2020 6:09 pm

Yeah, it should. None of my modifications have altered anything to do with the Auto Trans.

RomRaider

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CustomCode - Ign Retard 2-Step / No Lift Shift

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