how-to: ECU-based direct boost control

Reply Subscribe

Thread Tools

Search this Thread

Mar 26, 2008 | 09:37 AM

#346

mrfred

Thread Starter

EvoM Guru

iTrader: (50)

Joined: Mar 2006

Posts: 9,675

Likes: 132

From: Tri-Cities, WA // Portland, OR

Quote:

Originally Posted by bnice01

alright mrfred should be my last question LOL.

for tephra v5 all you have to do for the alternate boost if using direct boost control, is to change the scaling from load8 to psia8?

I also changed the name to "Alternate Baseline Boost".

Haven't looked at tephra's mods yet, but I think you've got it right: The alternate table load values get converted to psia8, and the table can be renamed.

Apr 1, 2008 | 09:31 PM

#347

fostytou

EvoM Community Team

iTrader: (15)

Joined: Sep 2006

Posts: 3,143

Likes: 7

From: Aurora, IL

Quote:

Originally Posted by bnice01

https://www.evolutionm.net/forums/sh...&postcount=331

Apr 9, 2008 | 03:06 AM

#348

recompile

Evolved Member

iTrader: (38)

Joined: Nov 2006

Posts: 1,745

Likes: 10

From: New Hampshire, USA

After switching to Tephra v5, the error correction seems to be screwed up.

I double checked my Boost Error RAM Address as well as my Adder and Baseline Boost tables... everything look good.

The problem I'm getting is, when I log Boost Error, it shows error is always -3... even if I'm overboosting past my tuned boost points. So basically I have no error correction.

Apr 9, 2008 | 05:24 AM

#349

MR Turco

EvoM Staff Alumni

iTrader: (16)

Joined: May 2007

Posts: 3,233

Likes: 3

From: Massachusetts

Mine does not do that. I am also using the v5 patch.

Apr 9, 2008 | 05:27 AM

#350

tephra

EvoM Guru

iTrader: (6)

Joined: Feb 2007

Posts: 9,486

Likes: 67

From: Melbourne, Australia

what correction interval shameless?

Apr 9, 2008 | 06:09 AM

#351

recompile

Evolved Member

iTrader: (38)

Joined: Nov 2006

Posts: 1,745

Likes: 10

From: New Hampshire, USA

Correction Interval 1

Apr 9, 2008 | 06:13 AM

#352

recompile

Evolved Member

iTrader: (38)

Joined: Nov 2006

Posts: 1,745

Likes: 10

From: New Hampshire, USA

I think I found my problem.

SHLR->SHLL for EBC: Stock will read 4A01. Change it to 4A00

Apr 9, 2008 | 06:42 AM

#353

mrfred

Thread Starter

EvoM Guru

iTrader: (50)

Joined: Mar 2006

Posts: 9,675

Likes: 132

From: Tri-Cities, WA // Portland, OR

Quote:

Originally Posted by ShamelessCookie

I think I found my problem.

SHLR->SHLL for EBC: Stock will read 4A01. Change it to 4A00

That would do it.

Apr 16, 2008 | 01:49 PM

#354

fostytou

EvoM Community Team

iTrader: (15)

Joined: Sep 2006

Posts: 3,143

Likes: 7

From: Aurora, IL

Is WGDC correction % supposed to look like that? It flatlines 16% as soon as I'm spooled.

Code:

<DataListItem DataLog="Y" Color="" Display="WGDC Correction" LogReference="WGDCCorr" RequestID="8B" Eval="0.5*x-64" Unit="WGDC%" MetricEval="" MetricUnit="" ResponseBytes="1" GaugeMin="-50" GaugeMax="50" ChartMin="-50" ChartMax="50" ScalingFactor="1" Notes="" Priority="1" Visible="False" />

Everything else has been just peachy

Apr 16, 2008 | 01:52 PM

#355

MR Turco

EvoM Staff Alumni

iTrader: (16)

Joined: May 2007

Posts: 3,233

Likes: 3

From: Massachusetts

What is your MAX WGDC Correction table set to?

Apr 16, 2008 | 02:06 PM

#356

RazorLab

EvoM Guru

iTrader: (8)

Joined: Aug 2003

Posts: 14,092

Likes: 1,090

From: Mid-Hudson, NY

Have you done the mods in your rom to support the WGDC Correction logging?

<table name="Load Error RAM Address" category="Turbo" address="41E06" type="1D" level="1" scaling="Hex16"/>

<table name="Load Error RAM Address in Load Error Table" category="Turbo" address="7254" type="1D" level="1" scaling="Hex16"/>

<table name="MUT8A" category="MUT" address="3F0AE" type="1D" level="1" scaling="Hex16"/>

<table name="MUT8B" category="MUT" address="3F0B2" type="1D" level="1" scaling="Hex16"/>

In EcuFlash:

The "Load Error RAM Address" and "Load Error RAM Address in Load Error Table" will both read: 69CA. Change both to 6EE2 (again, you'll need to enter it as 0x....)

Change MUT8A will read 6ACD. Change it to 6EE3 (again enter it as 0x....)

Change MUT8B will read 6B41. Change it to 6EE9 (enter it as 0x....)

Apr 16, 2008 | 02:13 PM

#357

mrfred

Thread Starter

EvoM Guru

iTrader: (50)

Joined: Mar 2006

Posts: 9,675

Likes: 132

From: Tri-Cities, WA // Portland, OR

Quote:

Originally Posted by MR Turco

What is your MAX WGDC Correction table set to?

Yeah, something is not right. What razorlab said, and would be good to log and post the WGDC as well.

Apr 16, 2008 | 03:04 PM

#358

recompile

Evolved Member

iTrader: (38)

Joined: Nov 2006

Posts: 1,745

Likes: 10

From: New Hampshire, USA

Quote:

Originally Posted by ShamelessCookie

I think I found my problem.

SHLR->SHLL for EBC: Stock will read 4A01. Change it to 4A00

I found this is an easy way to toggle on/off error correction (assuming the -3psi correction value is 0)... certainly easier than emptying the correction table and then re-creating it.

What exactly does this do, mrfred?

Apr 16, 2008 | 03:27 PM

#359

mrfred

Thread Starter

EvoM Guru

iTrader: (50)

Joined: Mar 2006

Posts: 9,675

Likes: 132

From: Tri-Cities, WA // Portland, OR

SHLR = divide by 2
SHLL = multiply by 2

These are used to scale the values read from the boost control RAM variable. When switching from load control to psi control, I need to multiply the boost reading by a factor of 4 to bring the values into a range that is suitable for the range of values that can be entered in the BDEL tables. Using SHLR will make the ECU think the boost is very low.