Welcome to the North American Subaru Impreza Owners Club Thursday March 28, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Engine Management & Tuning > AccessPort

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.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 01-29-2013, 11:14 AM   #1
zwalk
Scooby Specialist
 
Member#: 281705
Join Date: May 2011
Chapter/Region: SWIC
Location: Flagstaff, AZ
Vehicle:
2005 STi
CGM

Default CLosed

Closed
* Registered users of the site do not see these ads.

Last edited by zwalk; 02-12-2013 at 12:13 PM.
zwalk is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 01-29-2013, 11:18 AM   #2
zwalk
Scooby Specialist
 
Member#: 281705
Join Date: May 2011
Chapter/Region: SWIC
Location: Flagstaff, AZ
Vehicle:
2005 STi
CGM

Default

closed

Last edited by zwalk; 02-12-2013 at 12:13 PM.
zwalk is offline   Reply With Quote
Old 01-29-2013, 12:26 PM   #3
nhat
Scooby Guru
 
Member#: 140163
Join Date: Feb 2007
Chapter/Region: MAIC
Location: 3MI Racing
Vehicle:
03 STi
hellaflunctional

Default

No need for a new tune.

I wouldn't spend money on having the OEM manifold ceramic coated.

I can't think of any disadvantages.
nhat is offline   Reply With Quote
Old 01-29-2013, 12:41 PM   #4
zwalk
Scooby Specialist
 
Member#: 281705
Join Date: May 2011
Chapter/Region: SWIC
Location: Flagstaff, AZ
Vehicle:
2005 STi
CGM

Default

bumpy

Last edited by zwalk; 02-12-2013 at 12:14 PM.
zwalk is offline   Reply With Quote
Old 01-30-2013, 06:18 PM   #5
zwalk
Scooby Specialist
 
Member#: 281705
Join Date: May 2011
Chapter/Region: SWIC
Location: Flagstaff, AZ
Vehicle:
2005 STi
CGM

Default

closed

Last edited by zwalk; 02-12-2013 at 12:14 PM.
zwalk is offline   Reply With Quote
Old 02-01-2013, 04:05 PM   #6
staticchmbr
Scooby Newbie
 
Member#: 140108
Join Date: Feb 2007
Location: southeastern PA
Vehicle:
2000 impreza OBS
silver/titanium

Default

hmmm... so you can run a stock ported exhuast manifold without changing the tune? aftermrket ones will require one though, right?
staticchmbr is offline   Reply With Quote
Old 02-01-2013, 05:00 PM   #7
zwalk
Scooby Specialist
 
Member#: 281705
Join Date: May 2011
Chapter/Region: SWIC
Location: Flagstaff, AZ
Vehicle:
2005 STi
CGM

Default

Quote:
Originally Posted by staticchmbr
hmmm... so you can run a stock ported exhuast manifold without changing the tune? aftermrket ones will require one though, right?
Grimmspeed makes a lot of its stuff with stock parts, so it's the same but ceramic coated, bored out, and with a bigger crosspipe, but from the two sources I've consulted you don't need a tune
zwalk is offline   Reply With Quote
Old 02-01-2013, 05:31 PM   #8
BlazeRex
Scooby Specialist
 
Member#: 268354
Join Date: Dec 2010
Chapter/Region: NESIC
Location: Massachusetts
Vehicle:
02 WRX 05 LGT
Slow Automatics

Default

Quote:
Originally Posted by zwalk View Post
Also what kinds of disadvantages am I looking at with this part? And I'm assuming it won't make the car any louder.

Just quicker spool and potentially more top end
Disadvantages are ported manifolds usually develop leaks after some use.
BlazeRex is offline   Reply With Quote
Old 02-01-2013, 09:18 PM   #9
zwalk
Scooby Specialist
 
Member#: 281705
Join Date: May 2011
Chapter/Region: SWIC
Location: Flagstaff, AZ
Vehicle:
2005 STi
CGM

Default

Clsoed

Last edited by zwalk; 02-12-2013 at 12:14 PM.
zwalk is offline   Reply With Quote
Old 02-01-2013, 09:49 PM   #10
BlazeRex
Scooby Specialist
 
Member#: 268354
Join Date: Dec 2010
Chapter/Region: NESIC
Location: Massachusetts
Vehicle:
02 WRX 05 LGT
Slow Automatics

Default

Quote:
Originally Posted by zwalk View Post
Hmm alright, my buddy is a tech so hopefully that won't be too much of a hassle to fix
The walls are considerably thinner when ported. It can be hard to get them to seal, and you really don't gain any power.
BlazeRex is offline   Reply With Quote
Old 02-01-2013, 10:14 PM   #11
zwalk
Scooby Specialist
 
Member#: 281705
Join Date: May 2011
Chapter/Region: SWIC
Location: Flagstaff, AZ
Vehicle:
2005 STi
CGM

Default

Closed

Last edited by zwalk; 02-12-2013 at 12:14 PM.
zwalk is offline   Reply With Quote
Old 02-05-2013, 03:33 PM   #12
projectQWKSLVR
Scooby Specialist
 
Member#: 285270
Join Date: Jun 2011
Chapter/Region: NESIC
Vehicle:
03 WRX
PSM

Default

Quote:
Originally Posted by BlazeRex View Post
The walls are considerably thinner when ported. It can be hard to get them to seal, and you really don't gain any power.
Huh? GS matches the bore to the gaskets. There is plenty of meat left. I've had mine on/off the car multiple times with no issues what so ever. Have you seen their work in person? It's beautiful!

Enjoy your manifold OP!
projectQWKSLVR is offline   Reply With Quote
Old 02-06-2013, 12:03 PM   #13
staticchmbr
Scooby Newbie
 
Member#: 140108
Join Date: Feb 2007
Location: southeastern PA
Vehicle:
2000 impreza OBS
silver/titanium

Default

Great info... I just kind of hope Cobb chimes in to verify it doesn't need a tune.. last thing I want is to screw my car up.. Subarus are pretty temperamental when changing parts
staticchmbr is offline   Reply With Quote
Old 02-06-2013, 12:07 PM   #14
07VTRex
Scooby Specialist
 
Member#: 179023
Join Date: May 2008
Chapter/Region: MAIC
Location: Virginia
Vehicle:
07 CGM WRX TR
Dom 1.5xtr + PPG's

Default

its not really worth the money. i have the same grimspeed pnp w/ crosspipe you are referring to and i coudlnt notice a difference after installing it. i would be very suprised if you could feel a difference. its better in theory but i think the gains are maybe 5hp if your lucky. dont get me wrong, its a nice part, but the gains for the $ are not there at all. so small its not worth $300 dollars thats for sure.

cobb doesnt need to verify you dont need a tune. you dont need a tune, and im not cobb, there i said it
07VTRex is offline   Reply With Quote
Old 02-07-2013, 09:27 AM   #15
Cobb Tuning
NASIOC Vendor
 
Member#: 4803
Join Date: Mar 2001
Location: Austin, TX
Subaru Banner

Quote:
Originally Posted by staticchmbr View Post
Great info... I just kind of hope Cobb chimes in to verify it doesn't need a tune.. last thing I want is to screw my car up.. Subarus are pretty temperamental when changing parts
Shouldn't be a problem for the OTS maps. Always a good idea to data log with any part changes regardless. Could impact VE, so those with Speed Density tunes would have to take a closer look.

Bill
Cobb Tuning is offline   Reply With Quote
Old 02-07-2013, 12:39 PM   #16
staticchmbr
Scooby Newbie
 
Member#: 140108
Join Date: Feb 2007
Location: southeastern PA
Vehicle:
2000 impreza OBS
silver/titanium

Default

Quote:
Originally Posted by 07VTRex View Post
its not really worth the money. i have the same grimspeed pnp w/ crosspipe you are referring to and i coudlnt notice a difference after installing it. i would be very suprised if you could feel a difference. its better in theory but i think the gains are maybe 5hp if your lucky. dont get me wrong, its a nice part, but the gains for the $ are not there at all. so small its not worth $300 dollars thats for sure.

cobb doesnt need to verify you dont need a tune. you dont need a tune, and im not cobb, there i said it

im trying to pick up another oem header/crosspipe, and gasket match porting it myself.. saving a bunch of money. if it helps with spool, lag, or even adds a little hp, then i think its worth the few hours of work.

i just wanted cobb to chime in, because im running a stage 2 map, and its not in the list of approved mods on their site. plus, the last thing i want to do is screw up my motor

thanks cobb for chiming in!
staticchmbr is offline   Reply With Quote
Old 02-11-2013, 04:18 PM   #17
BlazeRex
Scooby Specialist
 
Member#: 268354
Join Date: Dec 2010
Chapter/Region: NESIC
Location: Massachusetts
Vehicle:
02 WRX 05 LGT
Slow Automatics

Default

Quote:
Originally Posted by projectQWKSLVR View Post
Huh? GS matches the bore to the gaskets. There is plenty of meat left. I've had mine on/off the car multiple times with no issues what so ever. Have you seen their work in person? It's beautiful!

Enjoy your manifold OP!
Nothing wrong with the porting. Its great workmanship. I just wouldn't recomend ported manifolds in general because they do have a tendency to leak.
BlazeRex 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

All times are GMT -4. The time now is 11:11 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.