MEGAsquirt A place to collectively sort out this megasquirt gizmo

IAT placement reason for richness?

Thread Tools
 
Search this Thread
 
Old 02-12-2013, 11:13 PM
  #1  
Junior Member
Thread Starter
iTrader: (3)
 
AdoboMiata's Avatar
 
Join Date: Dec 2011
Posts: 380
Total Cats: -17
Default IAT placement reason for richness?

I recently installed my hks bov that I bought from a member from here. It's the ssqv with the adjustment screw in the back. When I started my car, my wideband was reading rich... (9.0-9.6). I tried playing with the fuel tables and it didn't make a difference. There isn't any boost leaks (I used the soap and water test - no bubbles). At idle.. The bov isn't opening unless I rev the vehicle. Does the iat sensor placement make a difference? I have it placed on the hks flange - underneath the bov. Considering my ignitor is fried (RPM idle isn't working) could that play a role? Let me know. Thanks.
Attached Thumbnails IAT placement reason for richness?-image.jpg  
AdoboMiata is offline  
Old 02-12-2013, 11:23 PM
  #2  
Junior Member
Thread Starter
iTrader: (3)
 
AdoboMiata's Avatar
 
Join Date: Dec 2011
Posts: 380
Total Cats: -17
Default

Another picture
Attached Thumbnails IAT placement reason for richness?-image.jpg  
AdoboMiata is offline  
Old 02-13-2013, 08:33 AM
  #3  
Supporting Vendor
 
DIYAutoTune's Avatar
 
Join Date: Feb 2013
Posts: 63
Total Cats: 7
Default

Mount the IAT as close to the Cylinder as you can. Even on the intake manifold or on the TB is a good idea.

Having said this, wherever its at, make sure your tune adjusts correctly for it or your placement will be moot.
__________________
Peter - DIYAutoTune Tech Support
DIYAutoTune.com
We manufacture the most affordable high end engine management available anywhere, and we do it right here in the USA!

MegaSquirtPNP Gen2- 1 hour install Plug-N-Play for Miata's
-
MegaSquirt-3 Pro EMS - Top of the line ECU at an affordable price.
DIYAutoTune is offline  
Old 02-13-2013, 09:13 AM
  #4  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,493
Total Cats: 4,080
Default

You should talk to Ben about why we suggest otherwise. near the TB has proven to be the worst location.
Braineack is offline  
Old 02-13-2013, 09:14 AM
  #5  
Supporting Vendor
 
DIYAutoTune's Avatar
 
Join Date: Feb 2013
Posts: 63
Total Cats: 7
Default

Oh wow. thanks for the heads up. Ill go ask him.
__________________
Peter - DIYAutoTune Tech Support
DIYAutoTune.com
We manufacture the most affordable high end engine management available anywhere, and we do it right here in the USA!

MegaSquirtPNP Gen2- 1 hour install Plug-N-Play for Miata's
-
MegaSquirt-3 Pro EMS - Top of the line ECU at an affordable price.
DIYAutoTune is offline  
Old 02-13-2013, 09:22 AM
  #6  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,493
Total Cats: 4,080
Default

Basically, we were all dealing with awful heatsoak issues, and since the ideal gas law code is "broken" we were all struggling with lean hot-restarts. With MSI it wasn't as bad because you could tune the clt-related air density table to negate the idela gas law from pulling so much fuel when the AIT reports hot temps. But on MS2 we dont have the same decay so it would cause issues in boost when the AITs were actually getting that hot.

I like that they finally changed the ms3 code to give you full control over the MAT corrections.

But moving the AIT sensor to just after the IC signifcantly reduced the heaksoak we were seeing after parking the car and restarting after 5-10-15 minutes.
Braineack is offline  
Old 02-13-2013, 09:38 AM
  #7  
Supporting Vendor
 
DIYAutoTune's Avatar
 
Join Date: Feb 2013
Posts: 63
Total Cats: 7
Default

ah ok. Ben talked about that with me. hm... interesting. Ive seen some pretty big HP cars mount them in pretty much the same location despite the location of the TB. hm... interesting interesting interesting.
__________________
Peter - DIYAutoTune Tech Support
DIYAutoTune.com
We manufacture the most affordable high end engine management available anywhere, and we do it right here in the USA!

MegaSquirtPNP Gen2- 1 hour install Plug-N-Play for Miata's
-
MegaSquirt-3 Pro EMS - Top of the line ECU at an affordable price.
DIYAutoTune is offline  
Old 02-13-2013, 09:46 AM
  #8  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,493
Total Cats: 4,080
Default

when i finally went to ms3 and seq. fuel it didnt really matter cause i can idle at 16.0:1
Braineack is offline  
Old 02-13-2013, 12:36 PM
  #9  
Junior Member
Thread Starter
iTrader: (3)
 
AdoboMiata's Avatar
 
Join Date: Dec 2011
Posts: 380
Total Cats: -17
Default

I'll try moving it to see if it makes a difference. I'll place it on the hot side and take pictures. I did notice the bov was making my turbo surge. Adjustment screw was set to how hks wants it to be set. At WOT I wasn't getting my full boost.
AdoboMiata is offline  
Old 02-13-2013, 04:24 PM
  #10  
Junior Member
Thread Starter
iTrader: (3)
 
AdoboMiata's Avatar
 
Join Date: Dec 2011
Posts: 380
Total Cats: -17
Default

Mm acceptable?
Attached Thumbnails IAT placement reason for richness?-image.jpg  
AdoboMiata is offline  
Old 02-13-2013, 04:38 PM
  #11  
Elite Member
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 10,454
Total Cats: 1,799
Default

The location of your iat is not your problem. Its other tunning.

SSQV will surge. Its normal for them.

DO NOT mount it on the hotside.
triple88a is offline  
Old 02-13-2013, 04:55 PM
  #12  
Junior Member
Thread Starter
iTrader: (3)
 
AdoboMiata's Avatar
 
Join Date: Dec 2011
Posts: 380
Total Cats: -17
Default

I loaded the base map and changed a few settings (engine constant, etc) and it still was running rich.. I'll try putting on the RFL to see if it makes a difference..
AdoboMiata is offline  
Old 02-13-2013, 04:56 PM
  #13  
Junior Member
Thread Starter
iTrader: (3)
 
AdoboMiata's Avatar
 
Join Date: Dec 2011
Posts: 380
Total Cats: -17
Default

Originally Posted by triple88a
The location of your iat is not your problem. Its other tunning.

SSQV will surge. Its normal for them.

DO NOT mount it on the hotside.
What about mounting the Bov on the hotside?
AdoboMiata is offline  
Old 02-13-2013, 05:13 PM
  #14  
Elite Member
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 10,454
Total Cats: 1,799
Default

You can mount the bov on the hotside however my experience has been worse since that requires your bov to open even faster.
triple88a is offline  
Old 02-13-2013, 05:15 PM
  #15  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,493
Total Cats: 4,080
Default

it's your tune.
Braineack is offline  
Old 02-13-2013, 05:44 PM
  #16  
VladiTuned
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 35,821
Total Cats: 3,481
Default

yep tune.

stop messing with placement and bov and figure out the tune.

I had bov on both sides and doesn't matter. at all
18psi is offline  
Old 02-13-2013, 05:48 PM
  #17  
Junior Member
Thread Starter
iTrader: (3)
 
AdoboMiata's Avatar
 
Join Date: Dec 2011
Posts: 380
Total Cats: -17
Default

Originally Posted by triple88a
You can mount the bov on the hotside however my experience has been worse since that requires your bov to open even faster.

Originally Posted by Braineack
it's your tune.
The tune seemed fine until I installed that bov, now its backfiring like a B****. I installed the RFL, same problem. I only touched spark tables, engine constants, coolant density settings, exhaust gas settings, and ve tables. I'll post up the msq..
Attached Files
File Type: msq
feb2013.msq (35.0 KB, 82 views)
File Type: xls
new.xls (492.4 KB, 92 views)
AdoboMiata is offline  
Old 02-13-2013, 06:32 PM
  #18  
Elite Member
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 10,454
Total Cats: 1,799
Default

Hows ur map installed? I'm assuming ur maf is gone at this point?
triple88a is offline  
Old 02-13-2013, 07:00 PM
  #19  
Junior Member
Thread Starter
iTrader: (3)
 
AdoboMiata's Avatar
 
Join Date: Dec 2011
Posts: 380
Total Cats: -17
Default

Originally Posted by triple88a
Hows ur map installed? I'm assuming ur maf is gone at this point?
Yes, maf is gone. Does a fried ignitor play a role in this??
AdoboMiata is offline  
Old 02-13-2013, 08:20 PM
  #20  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,493
Total Cats: 4,080
Default

Originally Posted by AdoboMiata
Yes, maf is gone. Does a fried ignitor play a role in this??
if it's not sparking...then youll be rich as **** and make huge booms when it does finally ignite
Braineack is offline  


Quick Reply: IAT placement reason for richness?



All times are GMT -4. The time now is 06:42 PM.