Closed loop ebc for MS3 - Page 2 - 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 06-08-2014, 07:37 PM   #21
Senior Member
iTrader: (3)
 
Join Date: Dec 2007
Location: Brownsburg,IN
Posts: 800
Total Cats: 58
Default

What would make the boost initial duty table highlight the cells at 100% throttle when the engine is running





and at 30% throttle regardless of actual throttle position when the engine is not running, any ideas of what I should look for ?







Thanks
Attached Thumbnails
Closed loop ebc for MS3-boost3.jpg   Closed loop ebc for MS3-boost2.jpg   Closed loop ebc for MS3-boost4.jpg  
HHammerly is offline   Reply With Quote
Old 06-08-2014, 08:50 PM   #22
Boosting since 1984
iTrader: (1)
 
stefanst's Avatar
 
Join Date: Sep 2011
Location: Levittown
Posts: 1,198
Total Cats: 68
Default

Can't tell anything from your screenshots: One has the TP at 54%, the other at 60%, so the displays appear to make sense.
stefanst is offline   Reply With Quote
Old 06-08-2014, 10:32 PM   #23
Senior Member
iTrader: (3)
 
Join Date: Dec 2007
Location: Brownsburg,IN
Posts: 800
Total Cats: 58
Default

Take a look at the boost control initial duty table dot, that indicates where the throttle and rpm's are relative to it.
The first screen shot is with the engine running, throttle at 53% near 5k rpm, the table is showing 100% throttle at the correct rpm.
The second screen shot is with the engine not running 60% throttle and the boost control initial duty table sows throttle 30%with the correct rpm.
Hence (I think) that MS3 is only using full throttle rpm cells when running regardless actual throttle position to get EBC close to where it needs to be for PID to give the final adjustments.
It is not what I would expect, perhaps I have a wrong setting somewhere...
Thanks for the help !!!
HHammerly is offline   Reply With Quote
Old 06-08-2014, 10:49 PM   #24
Boosting since 1984
iTrader: (1)
 
stefanst's Avatar
 
Join Date: Sep 2011
Location: Levittown
Posts: 1,198
Total Cats: 68
Default

Quote:
Originally Posted by HHammerly View Post
Take a look at the boost control initial duty table dot, that indicates where the throttle and rpm's are relative to it.
The first screen shot is with the engine running, throttle at 53% near 5k rpm, the table is showing 100% throttle at the correct rpm.
The second screen shot is with the engine not running 60% throttle and the boost control initial duty table sows throttle 30%with the correct rpm.
Hence (I think) that MS3 is only using full throttle rpm cells when running regardless actual throttle position to get EBC close to where it needs to be for PID to give the final adjustments.
It is not what I would expect, perhaps I have a wrong setting somewhere...
Thanks for the help !!!
But the Y-Axis on that table specifies boost target, not throttle%. And since your boost target was at 100 at that time, everything seems to be in order....
stefanst is offline   Reply With Quote
Old 06-08-2014, 11:04 PM   #25
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

Quote:
Originally Posted by HHammerly View Post
What would make the boost initial duty table highlight the cells at 100% throttle when the engine is running
The Y axis on the table is boost target, not TPS -- so the big question is why are aren't you targeting any boost.
Ben is offline   Reply With Quote
Old 06-08-2014, 11:24 PM   #26
Senior Member
iTrader: (3)
 
Join Date: Dec 2007
Location: Brownsburg,IN
Posts: 800
Total Cats: 58
Default

As I understand from the help window,




the Y axis is a guess of what % of duty time the EBC valve will be open for any given throttle (on the left Colum) and rpm (on the bottom row), I started mostly closed EBC % to run on the canister boost and was going to gradually increase duty % to increase boost to find the correct settings without hitting over boost cut off all the time, but then noticed that the pointer is only on the top row when running and the bottom row when the engine is off and nothing in between...
Attached Thumbnails
Closed loop ebc for MS3-boost5.jpg  
HHammerly is offline   Reply With Quote
Old 06-09-2014, 11:33 PM   #27
Senior Member
iTrader: (3)
 
Join Date: Dec 2007
Location: Brownsburg,IN
Posts: 800
Total Cats: 58
Default

Any body knows why this would happen? am I wasting my time with this initial duty table? or just plain wrong? the car is running EBC OK with the "initial duty table un-selected" under boost control settings.

Attached Thumbnails
Closed loop ebc for MS3-boost8.jpg  
HHammerly is offline   Reply With Quote
Old 06-15-2014, 09:54 AM   #28
Senior Member
iTrader: (3)
 
Join Date: Dec 2007
Location: Brownsburg,IN
Posts: 800
Total Cats: 58
Default

Well, i downoaded firmware 1.3.2 and installed it, one if the changes was to the explanation of what the Y axis is and the initial boost table LOL


So i am starting with these settings



Thank you Setfanst and Ben for your help .
Attached Thumbnails
Closed loop ebc for MS3-boostinitblinst6142014.jpg   Closed loop ebc for MS3-boost6142014.jpg  
HHammerly is offline   Reply With Quote
Old 06-15-2014, 12:13 PM   #29
Boosting since 1984
iTrader: (1)
 
stefanst's Avatar
 
Join Date: Sep 2011
Location: Levittown
Posts: 1,198
Total Cats: 68
Default

I would first tune open loop and then just copy the tables over. That way you know that the PID is not interfering.

Disclaimer: I haven't done this myself yet, so I'm not speaking from experience!
stefanst is offline   Reply With Quote
Old 06-15-2014, 02:02 PM   #30
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,038
Total Cats: 407
Default

even better you can start in closed loop and just check your logs for the real value and plug it into the table.
y8s is offline   Reply With Quote
Old 06-15-2014, 02:17 PM   #31
Senior Member
iTrader: (3)
 
Join Date: Dec 2007
Location: Brownsburg,IN
Posts: 800
Total Cats: 58
Default

Good point, ill try that
HHammerly is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Buzzing from driver side of engine bay? (MS3 install) nick470 MEGAsquirt 7 06-16-2017 02:53 PM
My solution for Oiltemp and Oilpressure input into Megasuirt (MS3) Zaphod MEGAsquirt 41 01-24-2016 01:25 PM
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM
why is my car running like pewp? (tune/datalog) itsMikey MSPNP 3 09-28-2015 07:40 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 06:29 AM.