Raplacing the stock MAF question. - SaabCentral Forums
*
Home Saab Pictures Saab Classifieds Saab Dealer Listings Saab Forum Saab Forum


Go Back   SaabCentral Forums > Saab NG900, 1994-1998 and OG9-3, 1999-2002 & '03 Convertible (NG=new gen/OG=old gen) > NG900 & OG9-3 Performance, Mods & Tuning

NG900 & OG9-3 Performance, Mods & Tuning Covers Tuning & Performance modifications for the NG900 (1994 to 1998) & OG9-3 (1999-2002) & '03 Convertible

SaabCentral.com is the premier Saab Forum on the internet. Registered Users do not see the above ads.
Reply
 
Thread Tools Display Modes
  #1  
Old 17th November 2004
stevehayes01's Avatar
stevehayes01 stevehayes01 is offline
Saab Lunatic
 
Join Date: Mar 2004                                                
Location: Jacksonville, Fl.
My Saabs: 2000 9-3 SE HOT Automagic
Posts: 1,687
Default Raplacing the stock MAF question.

Ok I was just thinking about MAF's on T-7 cars and it led me to another thought. On cars like Camaro's and Firebirds you can replace the stock MAF with a performance MAF. Has this idea ever been applied to the SAAB world? or is the T-7 programmed and tied to it's specific MAF device that is factory installed? Just a thought since other GM cars are able to use swappable MAF's maybe this can be something that can be explored for the SAAB motors.

Ok let's hear the thoughts on this one!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 17th November 2004
Adrian W Adrian W is offline
Saab Crazy
 
Join Date: Sep 2004                                                
Location: Southern California
Posts: 804
Default

The stock MAF of the Saab is essentially identical to the stock MAF's on Camaro's and Firebirds of the same year. (They changed the design between certain years)

Either way, the stock MAF has a flow-chart all the way up to 800 hp or so. And most turbocharger inlets are 3" or smaller, so there isn't much need for a bigger MAF.

Still though, if you find a drop-in replacement for a Camaro or Firebird the same year as your Saab, it's possible it would work in the Saab as well. No way to know for sure without trying.

Adrian~
Reply With Quote Quick reply to this message
  #3  
Old 18th November 2004
stevehayes01's Avatar
stevehayes01 stevehayes01 is offline
Saab Lunatic
 
Join Date: Mar 2004                                                
Location: Jacksonville, Fl.
My Saabs: 2000 9-3 SE HOT Automagic
Posts: 1,687
Default

Ok the MAF is not larger on the Camaro and Firebird's it is just recalibrated and programed to allow a higher unrestricted air flow reading. So if they can reprogram the MAF sensors to be computer friendly then why can't they do it with a SAAB MAF? I am not sure that I go along with the fuel map up to 800Hp on a stock MAF as then there would be no need to switch to a reprogramed MAF or after market one and in the v-8 world a performance MAF can mean 25 to 35HP in some cases with no other mods to go with it. So the jusry is still out on this one for me so far. :-?? :-?? :-??


Here is an example of a reprogramed MAF for a Camaro.
http://rksport.com/product/p_040935012/view_detail
Reply With Quote Quick reply to this message
  #4  
Old 18th November 2004
Adrian W Adrian W is offline
Saab Crazy
 
Join Date: Sep 2004                                                
Location: Southern California
Posts: 804
Default

Ok, it was more like 650 hp, but to be fair they don't state a limit for all of them. That's just how high the graph goes. Here ya go:



450 g/s = 59.5 lbs/min airflow.

Adrian~
Reply With Quote Quick reply to this message
  #5  
Old 18th November 2004
Adrian W Adrian W is offline
Saab Crazy
 
Join Date: Sep 2004                                                
Location: Southern California
Posts: 804
Default

Also, interestingly, I made a regression of the values our stock SAAB MAF uses (from the WIS), and it fits right along with the LS1 graphs.

I even plotted two different regressions so that you could calculate fueling up to any horsepower you wish.

The data goes as follows:

Hz = Flowrate in g/s

1045 = 1
1312 = 1.5
1527 = 2
2012 = 3.5
2355 = 5
2788 = 7.5
3134 = 10
3648 = 15
4075 = 20
4764 = 30
5289 = 40
5730 = 50
6114 = 60
6753 = 80
7286 = 100
7743 = 120
8158 = 140

Regression for flow 1-30 g/s: (2.092*10^-6)x^2 - .004537x + 3.838

Regression for flow 20-140 g/s: (4.757*10^-6)x^2 - .0291x + 60.267

The next two images show both regression curves plotted in two different frames. You can see that the curve which fits the data at low flow does not fit at high flow, and vice versa. 140 g/s is roughly 20 lbs/min airflow. These are just to show validation for the formulae.





Adrian~
Reply With Quote Quick reply to this message
  #6  
Old 19th November 2004
jperk jperk is offline
SaabNut!
 
Join Date: Mar 2004                                                
Location: San Jose, CA
Posts: 276
Default

Just curious....what is the diameter of the MAF for a T-7/Viggen. I know I'm lazy...just hoping someone had the info so I didn't have to check for my self
Reply With Quote Quick reply to this message
  #7  
Old 19th November 2004
stevehayes01's Avatar
stevehayes01 stevehayes01 is offline
Saab Lunatic
 
Join Date: Mar 2004                                                
Location: Jacksonville, Fl.
My Saabs: 2000 9-3 SE HOT Automagic
Posts: 1,687
Default

I am going to measure the MAF on my 9-3 SE HOT today so I will tell you then but I believe it is around 3 3/4 inches or so possibley even 4 inches round. But I will post the results up after I measure it.
Reply With Quote Quick reply to this message
  #8  
Old 19th November 2004
ricot83's Avatar
ricot83 ricot83 is offline
Saab Lunatic
 
Join Date: Apr 2004                                                
Location: ConnecticutUsa
Posts: 2,051
Default

it 3 1/8inches outer diameter
Reply With Quote Quick reply to this message
  #9  
Old 19th November 2004
stevehayes01's Avatar
stevehayes01 stevehayes01 is offline
Saab Lunatic
 
Join Date: Mar 2004                                                
Location: Jacksonville, Fl.
My Saabs: 2000 9-3 SE HOT Automagic
Posts: 1,687
Default

There we have it then! No need to inspect it myself. Thanks ricot83!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the SaabCentral Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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


All times are GMT -4. The time now is 03:24 AM.



Powered by vBulletin® Copyright ©2000 - 2014, vBulletin Solutions, Inc.

top of page | sitemap | email us



copyright © 2003 - 2011 saabcentral.com, All rights reserved http://www.whiter.co.uk - valid xhtml - valid css
SaabCentral is an independently run website and is not affiliated in any way to Saab Automobile AB.


Garage Plus vBulletin Plugins by Drive Thru Online, Inc.