Welcome to the North American Subaru Impreza Owners Club Monday July 28, 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 > Pre-2002 Factory Turbo 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.
Reply
 
Thread Tools Display Modes
Old 09-17-2011, 08:36 PM   #1
darkcrave
Scooby Specialist
 
Member#: 204753
Join Date: Mar 2009
Location: Central Valley, CA
Vehicle:
2002 wrx

Default TD05H STI Turbo

I have the TD05 90* inlet
im trying to adjust the wastegate to run some more PSI, can someone explain to me on how to do this?
* Registered users of the site do not see these ads.
darkcrave is offline   Reply With Quote
Old 09-17-2011, 10:19 PM   #2
Subbiespeed
Scooby Specialist
 
Member#: 276493
Join Date: Mar 2011
Chapter/Region: MAIC
Location: VA
Vehicle:
2000 Impreza EJ20G
SRP

Default

y not just get a mbc? u can't really adjust the internal one unless u leave it open but then u'd have to get an external
Subbiespeed is offline   Reply With Quote
Old 10-10-2011, 07:58 AM   #3
subieguy87
Scooby Specialist
 
Member#: 153412
Join Date: Jul 2007
Chapter/Region: MWSOC
Location: Springfield,il
Vehicle:
1998 Impreza wrxRS
Black

Default

Quote:
Originally Posted by Subbiespeed
y not just get a mbc?
For real...
subieguy87 is offline   Reply With Quote
Old 10-10-2011, 12:45 PM   #4
gcMatt
Scooby Newbie
 
Member#: 278426
Join Date: Mar 2011
Chapter/Region: W. Canada
Location: Alberta, Canada
Vehicle:
1995 wrx
black

Default

Ive done this on my 1.8t vw if you adjust the wastegate actuator arm out more you run more boost. I DONT RECCOMEND THIS.
gcMatt is offline   Reply With Quote
Old 10-10-2011, 12:50 PM   #5
Built Industries
NASIOC Vendor
 
Member#: 33839
Join Date: Mar 2003
Chapter/Region: South East
Location: Sanford Fl
Vehicle:
2002 WRX
Black

Default

Quote:
Originally Posted by darkcrave View Post
I have the TD05 90* inlet
im trying to adjust the wastegate to run some more PSI, can someone explain to me on how to do this?
If you have threads on the actuator, righty tighty lefty loosey.

Make the arm shorter = more boost/ faster response.

Make arm longer = less boost/ slower response.
Built Industries is online now   Reply With Quote
Old 10-10-2011, 06:47 PM   #6
69subaru360
Scooby Guru
 
Member#: 159682
Join Date: Sep 2007
Chapter/Region: NESIC
Location: Maine
Vehicle:
1995 WRX
1998 2.5 RS

Default

Yup, I shortened it by 4 turns. Helped a lot with faster spool up.

You must have an MBC or EBC to lower the boost in the higher gears/rpms.
69subaru360 is offline   Reply With Quote
Old 10-17-2011, 11:53 AM   #7
da_coolest
Scooby Newbie
 
Member#: 236388
Join Date: Jan 2010
Default

once i found that the restrictor pill in the vacuum hose that gets connected from the turbo housing to the wastegate was missing. I took a removed one from a friend of mine and replaced it. Then the boost was increased to 20psi. But i think thats not the proper way to do it!
da_coolest is offline   Reply With Quote
Old 10-23-2011, 09:25 PM   #8
blkgm8
Scooby Newbie
 
Member#: 184543
Join Date: Jul 2008
Chapter/Region: NESIC
Vehicle:
JDM RHD GM8 Type R
02 6 Speed Bugeye

Default

Quote:
Originally Posted by 69subaru360 View Post
Yup, I shortened it by 4 turns. Helped a lot with faster spool up.

You must have an MBC or EBC to lower the boost in the higher gears/rpms.
LOL. It doesnt work like that...
A MBC or EBC will not be able to lower boost below the wastegate given pressure. Boost can only be increased over the wastegate setting. If you want less boost you will need to adjust the wastegate arm back down then use controller to turn it up.
blkgm8 is offline   Reply With Quote
Old 10-23-2011, 09:36 PM   #9
69subaru360
Scooby Guru
 
Member#: 159682
Join Date: Sep 2007
Chapter/Region: NESIC
Location: Maine
Vehicle:
1995 WRX
1998 2.5 RS

Default

Quote:
Originally Posted by blkgm8 View Post
LOL. It doesnt work like that...
A MBC or EBC will not be able to lower boost below the wastegate given pressure. Boost can only be increased over the wastegate setting. If you want less boost you will need to adjust the wastegate arm back down then use controller to turn it up.
Sure it does. The wastegate spring pressure isn't that high on these turbos. It would overboost badly with the factory boost control system and the wastegate actuator rod tightened up.
69subaru360 is offline   Reply With Quote
Old 10-25-2011, 02:36 AM   #10
blkgm8
Scooby Newbie
 
Member#: 184543
Join Date: Jul 2008
Chapter/Region: NESIC
Vehicle:
JDM RHD GM8 Type R
02 6 Speed Bugeye

Default

Quote:
Originally Posted by 69subaru360 View Post
Sure it does. The wastegate spring pressure isn't that high on these turbos. It would overboost badly with the factory boost control system and the wastegate actuator rod tightened up.
No... You may be going about it differently trying to say the same thing but anyone saying you can lower boost pressure... As in lower than the wastegate spring pressure with a boost controller is absolutely giving false information. Period!

The lowest a boost controller will go is down to the wastegate spring setting. Lets say you have an internal or external wastegate that has a 10 psi spring in it. It will open at nothing less than 10psi. You can use a boost controller to turn boost up, but not lower than the 10 psi set by the spring in the wastegate.
blkgm8 is offline   Reply With Quote
Old 10-25-2011, 07:53 AM   #11
69subaru360
Scooby Guru
 
Member#: 159682
Join Date: Sep 2007
Chapter/Region: NESIC
Location: Maine
Vehicle:
1995 WRX
1998 2.5 RS

Default

Quote:
Originally Posted by blkgm8 View Post
No... You may be going about it differently trying to say the same thing but anyone saying you can lower boost pressure... As in lower than the wastegate spring pressure with a boost controller is absolutely giving false information. Period!

The lowest a boost controller will go is down to the wastegate spring setting. Lets say you have an internal or external wastegate that has a 10 psi spring in it. It will open at nothing less than 10psi. You can use a boost controller to turn boost up, but not lower than the 10 psi set by the spring in the wastegate.
You didn't read the thread before you hit reply.

If you want to tighten up the wastegate actuator rod on one of these EJ20G TD0516G turbos to help it spool up a bit quicker, you need to replace the factory boost control system with either an mbc or an ebc so you have a method to lower the boost at the top end. If you don't it would overboost with the factory control.
69subaru360 is offline   Reply With Quote
Old 10-26-2011, 12:53 AM   #12
blkgm8
Scooby Newbie
 
Member#: 184543
Join Date: Jul 2008
Chapter/Region: NESIC
Vehicle:
JDM RHD GM8 Type R
02 6 Speed Bugeye

Default

Quote:
Originally Posted by 69subaru360 View Post
You didn't read the thread before you hit reply.

If you want to tighten up the wastegate actuator rod on one of these EJ20G TD0516G turbos to help it spool up a bit quicker, you need to replace the factory boost control system with either an mbc or an ebc so you have a method to lower the boost at the top end. If you don't it would overboost with the factory control.
Ok... I am not a fan of debating the way things work with people. I will only chime in to try and help people on here with usefull information based on my many years building and owning many high hp turbo vehicles. That is pretty much why you see newbie beside my name but I actually have been on here for years. I dont have much to say... Rather be driving or wrenching in my spare time.
360... You do sound like you get what I am saying and I think the misunderstanding is that I am talking general wastegate function and the fact that if you tighten the wastegate spring to lets say 12 psi of boost then no boost controller will turn that down because that is the new wastegate spring pressure. That is now your baseline boost setting. You are speaking specifically our boost control as a system. If you look at it as a whole system you have a valid point.
blkgm8 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
EJ20G TD05H 16G turbo set up slava from goshen Engine/Power/Exhaust 17 10-23-2008 10:58 PM
td05h 20g turbo RichWRX Engine/Power/Exhaust 3 06-08-2008 12:24 AM
WTB: Stock TD05h 16g Turbo Eatoniashoprat Private 'Wanted' Classifieds 6 01-04-2008 12:04 PM
TD05H 20G Turbo DTSTI Engine/Power/Exhaust 40 03-20-2007 03:12 PM
WTB: 20G TD06h or TD05h 7cm turbo ASAP!!!!! Cstmboxermotorsports Private 'Wanted' Classifieds 1 03-20-2007 12:20 AM


All times are GMT -4. The time now is 10:02 AM.


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.