Welcome to the North American Subaru Impreza Owners Club Wednesday August 16, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Go Back   NASIOC > NASIOC Technical > Normally Aspirated Powertrain

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. 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 11-18-2001, 10:11 PM   #1
Kevin Thomas
Street Racing Instructor
Member#: 110
Join Date: Jul 1999
Location: 1997 OBS, 1996 SVX, 1988 RX
1989 1989 XT6

Default Intake diameter and airflow question

If your Maf sensor and throttle body's diameter is smaller than the diameter of your intake, what is the affect of this on your Maf sensor calculations, air/fuel ratio readings and hp/torque?

Ex: A Maf sensor and throttle body has a diameter of 2.75". The intake you have installed has a diameter of 3". I know that the airflow should slow down after the Maf sensor since the diameter of the intake is bigger.....slowing down the airflow velocity. The thing is, the throttle body diameter goes back to the same size as the Maf sensor opening. I'm wondering if this is detrimental to performance of your engine.

Will this cause you to run lean/rich? Can it throw off the Maf sensors calculations? Does the airflow get affected reducing or increasing hp/torque? Just trying to learn something here.

Last edited by Kevin Thomas; 11-19-2001 at 12:20 AM.
Kevin Thomas is offline   Reply With Quote

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
Intake Manifold and TB Question SubyStud555 Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 1 07-25-2008 12:36 PM
intake mani and injector question N/A_junkie Built Motor Discussion 0 09-26-2007 07:45 PM
Airflow question- advice needed- cobb downpipe Roscoe Baron Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 3 12-15-2006 11:35 PM
Large diameter swaybar and bias question. Cosworth Motorsports 4 03-26-2003 04:34 PM
Intake diameter vs throttle body diameter Kevin Thomas Normally Aspirated Powertrain 0 03-03-2002 07:46 PM

All times are GMT -4. The time now is 10:41 PM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.