Also, make sure the scaling on the boost adder and the desired boost tables is setup for your sensor, the 4 bar OMNI. I believe its setup for the JDM/EVO X 3 bar by default.

 

{Option 2 94170715 (v7 + Mods Omni 4 Bar MAP) - Download | Mirror

• Set Immob. HEX to 0x0040 (check to make sure your old ROM was the same)
• mrfred psi based boost implemented for Omni 4 bar as default (just edit Tephra's gear dependant map)
• OBD II Inspection ready for EVAP and EGR
• Disabled EGR, EVAP, and Idle Tests
• Disabled P0300 code
• Disabled lean spool
• mrfred double fuel cut load limit implmeneted and set to 300 load (change to whatever you need this to be, read more)}

that's what version i used... i will double check it again.. this is what i found...


<table name="Boost Error Correction (PSI)" category="Global Boost Control Settings" address="4488" type="2D" level="2" scaling="OffsetWGDC">
<table name="Boost Error" address="69ac" type="Y Axis" elements="17" scaling="BoostErrorPsi OMNI4barMAP"/>
</table>


<scaling name="BoostErrorPsi OMNI4barMAP" units="psi" toexpr="(x-128)/(8*4.23)" frexpr="x*8*4.23+128" format="%.2f" min="-3.8" max="3.8" inc="0.1" storagetype="uint16" endian="big"/>


<table name="Boost Desired Engine 'PSI'" category="Main Map Boost Control Settings" address="3a9cd" type="3D" level="2" swapxy="true" scaling="PSIa8 Kavlico3.5barMAP">
<table name="Gear" address="3f1c2" type="X Axis" elements="7" scaling="uint16"/>
<table name="RPM" address="6982" type="Y Axis" elements="16" scaling="RPM"/>
</table>
<table name="Boost Adder (PSI)" category="Main Map Boost Control Settings" address="1a70" type="1D" level="2" scaling="PSIa16 Kavlico3.5barMAP"/>


both 'boost-adder' and 'BDE psi' refer to scaling for "Kavlico3.5barMAP" do i need to change that to "OMNI4barMAP"?

 

Yes, you should change it.

 

'OMNI4barMAP' refers to a scaling location already defined within the ROM it's self...



no other changes need to be made other than 'Kavlico3.5barMAP' to 'OMNI4barMAP'...

 

Just change the table definitions for boost adder and BDE so that it uses the `OMNI4barMAP` scaling instead of the `Kavlico3.5barMAP` scaling.

 

i made the changes and logged again...

with the BDE map set to '20' across the board.. still logging a boost error of -3.087 through the entire run even tho my OMNI MAP logged boost values of 20+ psi at multiple intervals..... it wasnt until i hit boost values of ~21 psi that it changed from -3.087... (first attachment)


i lowered all the values in the BDE table to 17.5.. utilizing the same WGDC map as my previous pulls... and was able to see a Change in "Boost Error" actually withing the ranges of -1~1... (second attachment)

it's taking more boost than the BDE is set at to reach an error of ~'0'... if i engage the BEC table will i still be able to make this kind of boost [21 psi peak] even though my BDE tables are set to 17.5...

 

The ECU will aim to get to 0 boost error. It doesn't care that your BDE table is set to 17.5 and that you're actually boosting 20. So yes with BDE at 17.5 it would aim for ~21 psi from the looks of it.

That said, in order to make your BDE table easier to read and adjust, I would instead adjust boost adder so that the value in the BDE table is going to be the boost pressure the ECU ends up aiming for. So instead of lowering BDE by 3, lower boost adder instead, that way you keep 20 in your BDE, which is your real target and makes it easier to remember what your target boost curve is.

 

by lowering my boost adder to 11.5... with an atmospheric pressure of 14.5 based on my location.. how do i account for the extra "3"???

boost adder + BDE-psi = atmospheric pressure + boost

{11.5 +20} doesnt equal {14.5 + 20}?

what exceptions do i need to make when setting up the BDE table w/ correctional intervals

 

You don't account for it; as you can see using your real atmospheric pressure results in too high of a target boost curve. So removing 3 from your boost adder will bring you closer to having BDE-psi = PSIg

NORMALLY you should be able to use boost adder = PSI(atmospheric) which means you can then simply use BDE = PSIg, but that doesn't seem to be the case with your car. That's why Jay wanted to make sure your scalings are set properly.

If you turn the ignition on but don't start the engine, and log your OMNIMAP, what reading do you get? If it's setup properly it should be 0.

 

it reads -0.0491

 

Ok, that's plenty close enough. What's your eval in evoscan?

 

0.2369*x-14.5

 

Ok, so 14.5 is your real atmospheric pressure. I'm at a loss now, can't figure out why setting your boost adder the same as your atmospheric pressure doesn't allow you to input desired PSIg directly into BDE and have it work.

 

man, the things you guys go through for ecu controlled boost lol.

 

tell me about it.... i think i figured a solution... theoretically... i can find out what PSIg is 'boost error' = "0".... and at what RPM..using that boost value and the difference in my BDE table since every value is the same... i can set a boost curve in BDE with BEC enabled that will follow my current Boost curve with no correction...