Welcome to the North American Subaru Impreza Owners Club Friday August 29, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Engine Management & Tuning > UTEC

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 12-11-2007, 09:35 AM   #1
hmanxx
Scooby Newbie
 
Member#: 104120
Join Date: Jan 2006
Chapter/Region: Tri-State
Location: NA
Default SD mode, running air > 5V of MAF sensor

If I were to use UTEC SD mode and knowing that the turbo will saturate the stock MAF sensor at 5V.

In this case, must I use bigger MAF housing to avoid the MAF sensor saturation ?

As in SD mode, it is MAP base, will it affect the SD mode operation once the MAF sensor saturated ?
* Registered users of the site do not see these ads.
hmanxx is offline   Reply With Quote
Old 12-11-2007, 04:20 PM   #2
Import Car Center
Vendor
 
Member#: 162594
Join Date: Oct 2007
Chapter/Region: TXIC
Location: Grapevine, Tx
Vehicle:
04 WRX STG 4+

Default

when in sd mode, it wont matter if the maf sensor is pegged at 5v as it runs off of the map sensor. when the utec crosses into the sd threshold, the maf is only used as a air temp sensor. thats one of the great things about sd.
Import Car Center is offline   Reply With Quote
Old 12-11-2007, 10:02 PM   #3
AaronWRX
Scooby Specialist
 
Member#: 7194
Join Date: Jun 2001
Chapter/Region: MAIC
Location: NoVa
Vehicle:
2011 997.2 Turbo
Black

Default

I find that even with SD it's nice to have MAF voltage to to compare one road pull agaisnt another. A bigMAF run at 4.9v feels a lot different then a bigMAF run at 4.5v
AaronWRX is offline   Reply With Quote
Old 12-12-2007, 01:10 AM   #4
Master2192
RIP 10/12/83 to 02/10/08
Scooby Specialist
 
Member#: 83254
Join Date: Mar 2005
Chapter/Region: NWIC
Location: Roy, Washington
Vehicle:
98 2.5 RS
04 WRX

Default

Quote:
Originally Posted by AaronWRX
I find that even with SD it's nice to have MAF voltage to to compare one road pull agaisnt another. A bigMAF run at 4.9v feels a lot different then a bigMAF run at 4.5v
You'd be able to tell between the two just by looking at the boost between those runs, no need to look at a MAF sensor voltage.


Here is a UTI log of a FP Green 05 WRX maxing out the MAF sensor in SD mode. As you can tell there is no leaning out caused by MAF saturation because it is running SD

Quote:
[TSMP][RPM][PSIG][MAF][TPS][LOD][KN][SNB][SIG][IDC%][IGN][VOEF][BMV][WBO2]
003.53 5623 +23.7 4.8 97 90 0 12.0 06.0 73.2 13.6 97 340 11.50
003.57 5732 +23.7 4.8 97 90 0 12.0 06.4 72.9 13.6 97 340 11.48
003.64 5787 +23.7 4.9 97 90 0 12.0 06.6 74.0 14.0 97 340 11.45
003.73 5829 +23.3 4.7 97 90 0 12.0 07.3 73.4 14.3 97 340 11.45
003.77 5944 +23.3 4.7 97 90 0 12.0 07.2 74.1 14.1 97 340 11.45
003.84 6017 +22.9 4.8 97 90 0 12.0 07.9 77.0 15.1 97 340 11.44
003.91 6115 +22.9 4.8 97 90 0 12.0 09.2 77.6 15.2 98 340 11.39
003.97 6179 +22.9 4.9 97 90 0 12.0 09.3 76.7 15.3 97 340 11.38
004.02 6238 +23.1 4.9 97 90 0 12.0 09.1 79.6 15.4 97 340 11.38
004.13 6304 +23.1 4.9 97 90 0 12.0 09.5 79.2 15.6 97 340 11.36
004.16 6383 +23.1 4.9 97 90 0 12.0 11.7 80.1 16.2 97 340 11.36
004.22 6359 +23.1 4.9 97 90 0 12.0 11.7 81.9 16.6 97 340 11.36
004.30 6497 +22.7 4.9 97 90 0 12.0 11.6 81.8 16.7 97 340 11.31
004.37 6542 +22.7 4.9 97 90 0 12.0 11.7 83.0 16.7 97 340 11.30
004.41 6643 +22.9 4.9 97 90 0 12.0 12.0 82.7 16.7 97 340 11.31
004.48 6690 +22.9 5.0 97 90 0 12.0 12.1 83.0 16.7 97 340 11.33
004.58 6794 +23.1 5.0 97 90 0 12.0 12.3 86.2 17.0 97 340 11.31
004.62 6848 +22.9 5.0 97 90 0 12.0 12.4 86.2 17.4 97 340 11.27
004.66 6827 +23.1 5.0 97 90 0 12.0 12.2 86.8 17.2 97 340 11.23
004.75 6936 +22.9 4.9 97 90 0 12.0 12.1 86.1 17.0 97 340 11.14
004.80 6995 +22.9 5.0 97 90 0 12.0 12.4 85.9 18.0 97 340 11.14
Master2192 is offline   Reply With Quote
Old 12-12-2007, 11:37 AM   #5
hmanxx
Scooby Newbie
 
Member#: 104120
Join Date: Jan 2006
Chapter/Region: Tri-State
Location: NA
Default

cool..thank you very much..this helps alot ..and I can concentrate on the tune.
hmanxx is offline   Reply With Quote
Old 01-23-2008, 06:55 AM   #6
Bilyk WRX
Scooby Newbie
 
Member#: 89058
Join Date: Jun 2005
Chapter/Region: International
Location: Kiev, Ukraine
Vehicle:
2003 WRX 9.63/150mph
EJ257+BW S374 735whp

Default

do I need bigMAF runing SD with FPGreen and 29PSI ?
Bilyk WRX is offline   Reply With Quote
Old 01-25-2008, 08:02 AM   #7
Bilyk WRX
Scooby Newbie
 
Member#: 89058
Join Date: Jun 2005
Chapter/Region: International
Location: Kiev, Ukraine
Vehicle:
2003 WRX 9.63/150mph
EJ257+BW S374 735whp

Default

someone?
Bilyk WRX is offline   Reply With Quote
Old 01-25-2008, 08:36 AM   #8
rewt
Scooby Specialist
 
Member#: 60794
Join Date: Apr 2004
Chapter/Region: MAIC
Location: Somewhere in Northern DE
Vehicle:
2007 Solstice GXP

Default

Quote:
Originally Posted by Bilyk WRX View Post
do I need bigMAF runing SD with FPGreen and 29PSI ?
No, a BigMAF is not necessary when running SD.
rewt is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Front 02 Sensor,Rear 02 Sensor,MAF Sensor,Blox Shift Knob,SPT Oil Cap, bunch of stuff TopEndPull Engine/Power/Exhaust 11 08-14-2009 05:48 PM
location of MAF sensor on 02 TS dlong27 Normally Aspirated Powertrain 3 05-29-2009 01:20 PM
SD question: MAF sensor placement.... AaronWRX UTEC 9 05-23-2007 07:04 PM
AEM cold air intake + MAF sensor for sale ZapZilla Private 'For Sale' Classifieds 6 02-12-2004 10:30 PM


All times are GMT -4. The time now is 09:34 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.