How the F do I turn off the closed loop boost control? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


MEGAsquirt A place to collectively sort out this megasquirt gizmo

Reply
 
 
 
LinkBack Thread Tools
Old 04-17-2008, 10:32 AM   #1
Ben
Supporting Vendor
Thread Starter
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default How the F do I turn off the closed loop boost control?

Man, I wish I had never entered any target numbers in the closed loop table. Now that they're in there, it won't let me delete them.

Here's the problem:
at 4400 rpm I hit target boost ~215kpa
at 5000 rpm ebc pulls duty cycle to ~180kpa
it will then continue to oscilate between 215 and 180 as I continue the pull. MAP looks like a freakin sine wave.

I have to go buy a USB dongle to upload a screen capture, dataloq, and msq. Will do that in a few hours.

Pahhleezzee heallp
Ben is offline   Reply With Quote
Old 04-17-2008, 10:57 AM   #2
Elite Member
iTrader: (5)
 
Atlanta93LE's Avatar
 
Join Date: Sep 2006
Location: Marietta, GA
Posts: 2,198
Total Cats: 1
Default

Set them all to 70kPa, with the closed-loop kPa limit at 20 or so. That'll effectively turn off closed-loop boost control. That's how the pnp base map turns it off, and has worked well for me. I ended up playing with it a bit, but went back to those base settings and it turned off nicely.
Atlanta93LE is offline   Reply With Quote
Old 04-17-2008, 10:59 AM   #3
Ben
Supporting Vendor
Thread Starter
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

I tried that.
Ben is offline   Reply With Quote
Old 04-17-2008, 11:02 AM   #4
Elite Member
iTrader: (5)
 
Atlanta93LE's Avatar
 
Join Date: Sep 2006
Location: Marietta, GA
Posts: 2,198
Total Cats: 1
Default

I had a bit of trouble changing the values a week or so ago. I had to change the table with the laptop disconnected from MS, save the msq, then load it up. Otherwise, the burning never seemed work. Just another idea...that you've probably already tried.
Atlanta93LE is offline   Reply With Quote
Old 04-17-2008, 11:03 AM   #5
Ben
Supporting Vendor
Thread Starter
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

tried that too

wouldn't mind just removing the feature completely.
Ben is offline   Reply With Quote
Old 04-17-2008, 11:04 AM   #6
Elite Member
iTrader: (5)
 
Atlanta93LE's Avatar
 
Join Date: Sep 2006
Location: Marietta, GA
Posts: 2,198
Total Cats: 1
Default

Good luck.
Atlanta93LE is offline   Reply With Quote
Old 04-17-2008, 11:08 AM   #7
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,872
Total Cats: 1,790
Default

under boost control, turn closed loop kPa limit to 0.
Braineack is offline   Reply With Quote
Old 04-17-2008, 11:18 AM   #8
Ben
Supporting Vendor
Thread Starter
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

tried that too. get some error message, that the minimum acceptable value is 20.
Ben is offline   Reply With Quote
Old 04-17-2008, 11:54 AM   #9
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,872
Total Cats: 1,790
Default

Fail.
Braineack is offline   Reply With Quote
Old 04-17-2008, 02:02 PM   #10
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Delicious and Moist.
Posts: 26,322
Total Cats: 1,918
Default

Edit the MSQ by hand?
Joe Perez is online now   Reply With Quote
Old 04-17-2008, 02:18 PM   #11
Ben
Supporting Vendor
Thread Starter
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

Zip contains msq and datalog
Screen cap shows what I'm talking about
Attached Thumbnails
How the F do I turn off the closed loop boost control?-screen_cap_boost.jpg  
Attached Files
File Type: zip veanalyze12_wuss_spark_take3.zip (337.4 KB, 30 views)
Ben is offline   Reply With Quote
Old 04-17-2008, 02:25 PM   #12
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,872
Total Cats: 1,790
Default

Code:
 <page number="7" size="189">
      <constant cols="6" name="bcBins1" rows="6" units="kpa">
         0 0 0 0 0 0
         0 0 0 0 0 0
         0 0 0 0 0 0
         0 0 0 0 0 0
         0 0 0 0 0 0
         0 0 0 0 0 0
      </constant>
Code:
<constant name="bc_max_diff" units="kPa">0</constant>
Braineack is offline   Reply With Quote
Old 04-17-2008, 02:35 PM   #13
Ben
Supporting Vendor
Thread Starter
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

seems to me it would need a f/w change, not a s/w change, as I want to disable the PID

scott, you want me to simply change the bins all to 0 and add to the bottom
Quote:
<constant name="bc_max_diff" units="kPa">0</constant>
Ben is offline   Reply With Quote
Old 04-17-2008, 02:37 PM   #14
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,872
Total Cats: 1,790
Default

no search the string constant name="bc_max_diff" and change that to a zero.

that would force using table2 which is the duty cycle table. dunno why it wont let you use 0 that's what i've always done.

both snippets above are straight out of my MSQ.
Braineack is offline   Reply With Quote
Old 04-17-2008, 02:48 PM   #15
Ben
Supporting Vendor
Thread Starter
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

I get it now. I was a little confused, but with the code tags that you edited in, it was no sweat. Thank you, I hope that changing the limit value to 0 will causes EBC to straight ignore what's happening. I edited the table too.
Ben is offline   Reply With Quote
Old 04-17-2008, 10:05 PM   #16
Ben
Supporting Vendor
Thread Starter
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default 2 steps fprward

1 step back

Good news: No more oscillations
Bad news: Here's what all the 0's turned into:


Now what happens is boost shoots up uncontrollably, almost as if there were no wastegate, until it hits overboost protection.

Here's a 70% throttle stab


Here's me modulating boost with throttle position (note: 5th gear to 6k )




More ideas?
Ben is offline   Reply With Quote
Old 04-17-2008, 10:08 PM   #17
Ben
Supporting Vendor
Thread Starter
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

Also, when I manually edit a .msq with notepad, MT and MLV no longer recognize the file as a .msq. I can still right click and open with, but because MLV won't recognize the file, I can't load the msq for VE Analyze. Which is not good.

Please help. I'm cranky as **** because the water's shut off, I'm tired and stinky, and can't shower.
******* water main broke up the road.
Ben is offline   Reply With Quote
Old 04-18-2008, 09:53 AM   #18
Ben
Supporting Vendor
Thread Starter
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default success

These values worked for me. The table remained locked at 10 and the delta remained at 3.

Code:
 <page number="7" size="189">
      <constant cols="6" name="bcBins1" rows="6" units="kpa">
         10 10 10 10 10 10
         10 10 10 10 10 10
         10 10 10 10 10 10
         10 10 10 10 10 10
         10 10 10 10 10 10
         10 10 10 10 10 10
      </constant>
Code:
<constant name="bc_max_diff" units="kPa">3</constant>
Ben is offline   Reply With Quote
Old 04-18-2008, 10:47 AM   #19
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,872
Total Cats: 1,790
Default

cool. dunno why i can load zeros throughout mine. i copied that **** straight form my file, however it's still a 029v, maybe why

at least it's working now....
Braineack is offline   Reply With Quote
Old 04-18-2008, 11:56 AM   #20
Elite Member
iTrader: (13)
 
cjernigan's Avatar
 
Join Date: Oct 2006
Location: Atlanta, GA
Posts: 8,147
Total Cats: 6
Default

I've found that some MSQs will let you load zeros while other's won't. I could never figure out why some would be ok with it and some weren't, this includes when i ran 029v and other non-hires code.
cjernigan is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 58 Yesterday 10:04 PM
Another Cast Manifold Corky Bell Prefabbed Turbo Kits 18 11-22-2016 10:01 PM
Going back to stock. Need some 1.6 parts. Trent WTB 2 10-01-2015 01:15 PM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM
Walbro 255lph Fuel Pump $50 lsc224 Miata parts for sale/trade 2 10-01-2015 10:17 AM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 11:10 PM.