MS2 with LC-2 and downstream O2 - 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 03-12-2015, 11:57 PM   #1
Newb
Thread Starter
 
Join Date: Aug 2013
Posts: 36
Total Cats: 5
Default MS2 with LC-2 and downstream O2

I am in the process of installing MS2 basic (Reverant) into my Exocet. Motor is from a California donor 99 miata. Car is currently non-turbo. I'm installing the LC-2, and trying to figure out where to put the wideband sensor. Would it be possible to remove the secondary (downstream) OEM O2 sensor and install the wideband sensor in its place? Or do I have to weld an additional bung instead?
SteadFast is offline   Reply With Quote
Old 03-13-2015, 12:16 AM   #2
Senior Member
iTrader: (2)
 
williams805's Avatar
 
Join Date: Oct 2013
Location: Goleta, Southern California
Posts: 510
Total Cats: 25
Default

Possible? Yes. Recomended, no.
I take it your on a stock ECU. So weld another bung in.
williams805 is offline   Reply With Quote
Old 03-13-2015, 12:21 AM   #3
Newb
Thread Starter
 
Join Date: Aug 2013
Posts: 36
Total Cats: 5
Default

Quote:
Originally Posted by williams805 View Post
Possible? Yes. Recomended, no.
I take it your on a stock ECU. So weld another bung in.
I just removed the stock ECU and am installing megasquirt along with wideband lc-2. I guess the basic question would be, does megasquirt use the downstream o2 sensor. As a side note, I never plan to revert back to the OEM ECU.
SteadFast is offline   Reply With Quote
Old 03-13-2015, 12:28 AM   #4
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,992
Total Cats: 1,459
Default

Why not install it in the main o2 sensor bung? Where the first OEM one was.
aidandj is offline   Reply With Quote
Old 03-13-2015, 12:39 AM   #5
Newb
Thread Starter
 
Join Date: Aug 2013
Posts: 36
Total Cats: 5
Default

So as long as the wideband is there, Megasquirt does not use the narrowband O2 sensors (both upstream and downstream)?
SteadFast is offline   Reply With Quote
Old 03-13-2015, 12:40 AM   #6
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,992
Total Cats: 1,459
Default

Nope, most of the time the wideband is wired into the narrowband pin on the ECU.
aidandj is offline   Reply With Quote
Old 03-13-2015, 01:09 AM   #7
Newb
Thread Starter
 
Join Date: Aug 2013
Posts: 36
Total Cats: 5
Default

Good to know. I will be putting the LC-2 wideband O2 sensor in the OEM secondary location. Thanks for the quick responses.
SteadFast is offline   Reply With Quote
Old 03-13-2015, 09:59 AM   #8
Senior Member
iTrader: (2)
 
williams805's Avatar
 
Join Date: Oct 2013
Location: Goleta, Southern California
Posts: 510
Total Cats: 25
Default

Quote:
Originally Posted by aidandj View Post
Why not install it in the main o2 sensor bung? Where the first OEM one was.
Again, why not this^?
williams805 is offline   Reply With Quote
Old 03-13-2015, 12:08 PM   #9
Newb
Thread Starter
 
Join Date: Aug 2013
Posts: 36
Total Cats: 5
Default

Quote:
Originally Posted by williams805 View Post
Again, why not this^?
Good point. Will do this instead.
SteadFast is offline   Reply With Quote
Old 03-13-2015, 12:12 PM   #10
Supporting Vendor
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,440
Total Cats: 198
Default

Behind the cat is totally wrong, if there is still a cat. The values shown will be wrong.
Reverant is offline   Reply With Quote
Old 03-13-2015, 01:20 PM   #11
Newb
Thread Starter
 
Join Date: Aug 2013
Posts: 36
Total Cats: 5
Default

Quote:
Originally Posted by Reverant View Post
Behind the cat is totally wrong, if there is still a cat. The values shown will be wrong.
Reverant, can you send me the base map for a stock 99 miata for the ECU you built for me. It is currently running 3.3.2 beta 6.

Last edited by SteadFast; 03-13-2015 at 03:05 PM.
SteadFast is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
mslabs MS2 - Idle control issue ndragun MEGAsquirt 0 09-20-2015 11:28 PM
Turbo Exhaust Theory, The Gospel According to Garrett sixshooter DIY Turbo Discussion 11 09-02-2009 09:18 PM
Again with the backpressure = torque JasonC SBB DIY Turbo Discussion 6 05-11-2008 10:23 PM
Fs: Ms2 Cpu. neogenesis2004 Miata parts for sale/trade 1 10-26-2007 11:43 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 08:45 PM.