Welcome to the North American Subaru Impreza Owners Club Saturday December 20, 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 > Built Motor Discussion

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 09-30-2007, 03:34 PM   #1
ejh25
Scooby Specialist
 
Member#: 65267
Join Date: Jun 2004
Chapter/Region: MAIC
Location: Arlington, VA
Vehicle:
2002 WRX
Silver

Default Aftermarket Intake Manifolds

I'm running a GT52 on a built 2.5 with V8 Spec C heads and some valvetrain upgrades. My question is this: would a long runner aftermarket intake manifold give me much of a gain? If yes, where in the powerband would it have the greatest effect?

Thanks,
Eric
ejh25 is offline   Reply With Quote
Old 10-01-2007, 12:06 AM   #2
STiBottom
Scooby Specialist
 
Member#: 127041
Join Date: Sep 2006
Location: Marietta, GA
Vehicle:
02 WRX
Midnight Blue Pearl

Default

Well if you elongate the runners on an intake manifold then you are more than likely going to see your torque numbers sooner and the power curve flattens out sooner.
STiBottom is offline   Reply With Quote
Old 10-29-2007, 01:06 AM   #3
dblrsf1nest
Scooby Newbie
 
Member#: 162882
Join Date: Oct 2007
Chapter/Region: NWIC
Location: LACEY
Vehicle:
04 wrx
WRb

Default

what type of manifold would be best for the torque end i am looking around right now and i have no knowledge on a good manifold
dblrsf1nest is offline   Reply With Quote
Old 10-29-2007, 01:08 AM   #4
bloopsta26
Scooby Specialist
 
Member#: 131371
Join Date: Nov 2006
Chapter/Region: TXIC
Location: Belvitucky
Vehicle:
05 buy my parts so
i can get my sti running

Default

i kno the magnus intake manifold is amazing. it comes with ither long runners or short runners.....thats what im going to be using on my build
bloopsta26 is offline   Reply With Quote
Old 10-29-2007, 01:27 AM   #5
Patrick Olsen
NASIOC Supporter
 
Member#: 120
Join Date: Jul 1999
Chapter/Region: AKIC
Location: Where the Navy sends me...
Vehicle:
1997 Legacy 2.5GT
QuickSilver Metallic

Default

Patrick Olsen is offline   Reply With Quote
Old 10-29-2007, 01:28 AM   #6
jigga
Scooby Guru
 
Member#: 9960
Join Date: Sep 2001
Location: in bed...
Vehicle:
2002 Impreza WRX
WRBlue Perl

Default

^^ reviews on that magnus intake manifold appear to be mixed. Some people like it, others tell you to stay away. Unfortunately more people have the latter to say, so it's hard to see how good or even reliable it is. I know one ex member here was stranded on the side of the road when his popped on him.

Then there is the availability factor also. Nobody seems to have them in stock..more so for the drive by cable version
jigga is offline   Reply With Quote
Old 10-29-2007, 01:33 AM   #7
Homemade WRX
Scooby Guru
 
Member#: 33782
Join Date: Mar 2003
Chapter/Region: MAIC
Location: 3MI Racing LLC
Vehicle:
96 bastard child
search FIRST, then PM!!!

Default

longer runners increase lower rpm volumetric efficiencies which translates into low end torque..the trade off is top end volumetric loss. This trade off can be reduced someif the manifold is properly designed to then catch another reflective wave at a higher rpm.
Homemade WRX 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
WTB: Polished or Aftermarket intake manifold midnightsti Private 'Wanted' Classifieds 4 06-13-2006 07:39 PM
Aftermarket intake manifold west005 Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 18 05-30-2006 10:03 PM
Aftermarket Intake Manifolds WRXRallyBlue Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 25 10-03-2005 09:11 PM
New/Aftermarket Intake manifold Twelvz Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 29 03-11-2005 01:32 PM
New Aftermarket Intake Manifold DonkeyPunch Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 14 01-15-2005 07:15 PM


All times are GMT -4. The time now is 05:17 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.