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 > Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo)

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 08-02-2006, 08:07 AM   #1
ChrisCJ99
Scooby Specialist
 
Member#: 120647
Join Date: Jul 2006
Chapter/Region: South East
Location: Tampa, FL
Vehicle:
2006 WRX
Charcoal Grey

Default 18G on 2006 WRX

So I've been researching on upgrading my turbo on my '06 WRX and it seems like the 18G is the way to go ( I was seriously considering, and still am, getting a new VF34). I'm pretty much trying to avoid having to upgrade my injectors. I've heard that I should be ok with the stock injectors with an 18G, but I've also heard that the stock injectors will be running 100% duty cycle if I do go with the 18G.

So my question is, will this damage or be unsafe for my car to be running 100% duty cycle if I go with the 18G? I also asked if it was ok to run my turbo below its efficiency range until I can upgrade the injectors so that I won't be maxing out the injectors, and they said that it possible. Does anyone have an 18G on their 06 WRX with stock injectors? Any help would be appreciated.
ChrisCJ99 is offline   Reply With Quote
Old 08-02-2006, 09:44 AM   #2
Uncle Scotty
*** Banned ***
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK buy Nates beans
westcoastroasting.com

Default

....there are lotsa deeeeeewwwwwwwds runnin 20G's with the stock injectors.....skip the vf34....get a Walbro 342
Uncle Scotty is offline   Reply With Quote
Old 08-02-2006, 10:00 AM   #3
ChrisCJ99
Scooby Specialist
 
Member#: 120647
Join Date: Jul 2006
Chapter/Region: South East
Location: Tampa, FL
Vehicle:
2006 WRX
Charcoal Grey

Default

I have been told thought that running stock injectors on a bigger turbo will cause problems... Anyone know what risks I would be taking if I did? And has anyone ran into problems by doing this?
ChrisCJ99 is offline   Reply With Quote
Old 08-02-2006, 11:51 AM   #4
Uncle Scotty
*** Banned ***
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK buy Nates beans
westcoastroasting.com

Default

Quote:
Originally Posted by ChrisCJ99
I have been told thought that running stock injectors on a bigger turbo will cause problems... Anyone know what risks I would be taking if I did? And has anyone ran into problems by doing this?

....are you going to run 20+psi???

no = fergetaboutit
Uncle Scotty is offline   Reply With Quote
Old 08-02-2006, 10:17 PM   #5
rpolloc9
Scooby Newbie
 
Member#: 121343
Join Date: Jul 2006
Vehicle:
06 WRX
Black

Default

you need new injectors with 18g or 20g or mod your current ones.
rpolloc9 is offline   Reply With Quote
Old 08-02-2006, 10:59 PM   #6
Chris_M
Scooby Specialist
 
Member#: 116665
Join Date: Jun 2006
Chapter/Region: BAIC
Location: Modesto, CA
Vehicle:
2016 STI
WRB

Default

You do not need new injectors for the 18g. The stockers will do just fine.

research owns you rpolloc9. Don't take this personally, but don't post miss leading info.
Chris_M is offline   Reply With Quote
Old 08-02-2006, 11:03 PM   #7
06BLUEREX
Scooby Newbie
 
Member#: 120000
Join Date: Jul 2006
Default

actually it would be best that you did get big injectors so that you wont leave anything on the table like i did.
06BLUEREX is offline   Reply With Quote
Old 08-02-2006, 11:08 PM   #8
Chris_M
Scooby Specialist
 
Member#: 116665
Join Date: Jun 2006
Chapter/Region: BAIC
Location: Modesto, CA
Vehicle:
2016 STI
WRB

Default

06bluerex,

You runnin the 18? I'm thinkin about going that route in a few months. What injectors did you go with? How much HP you putn down at the wheels? I know what the ran at Cobb on the stockers, I'm currious what the bigger injectors gave you.
Chris_M is offline   Reply With Quote
Old 08-02-2006, 11:08 PM   #9
rpolloc9
Scooby Newbie
 
Member#: 121343
Join Date: Jul 2006
Vehicle:
06 WRX
Black

Default

You dont own anything. This is directly from Cobb, Fine Line Imports, my local tuner, and FP themselves. I just did 2 weeks worth of research for myself. They all recommend at least 650cc injectors.

Stock injectors will not run the 18g optimally, period. I'm sure people have run stock, but at what risk?
rpolloc9 is offline   Reply With Quote
Old 08-02-2006, 11:11 PM   #10
06BLUEREX
Scooby Newbie
 
Member#: 120000
Join Date: Jul 2006
Default

i have a FP18G, ebay tmic, turboback exhaust,walbro fuel pump, perrin ebcs,colder plugs and k&n drop in panel filter. my injectors were nearly maxed out. this is what the tuner told me, he showed it to me while he was trying to get a baseline run. i was tuned at MZM in Austin,TX.
06BLUEREX is offline   Reply With Quote
Old 08-02-2006, 11:13 PM   #11
Chris_M
Scooby Specialist
 
Member#: 116665
Join Date: Jun 2006
Chapter/Region: BAIC
Location: Modesto, CA
Vehicle:
2016 STI
WRB

Default

Blue, What were the #'s?
Chris_M is offline   Reply With Quote
Old 08-02-2006, 11:13 PM   #12
rpolloc9
Scooby Newbie
 
Member#: 121343
Join Date: Jul 2006
Vehicle:
06 WRX
Black

Default

Yes, they said you would run maxed out with the stock injectors. They highly recommend you not do that...but of course its your choice
rpolloc9 is offline   Reply With Quote
Old 08-02-2006, 11:23 PM   #13
ChrisCJ99
Scooby Specialist
 
Member#: 120647
Join Date: Jul 2006
Chapter/Region: South East
Location: Tampa, FL
Vehicle:
2006 WRX
Charcoal Grey

Default

Quote:
Originally Posted by rpolloc9
Yes, they said you would run maxed out with the stock injectors. They highly recommend you not do that...but of course its your choice
And this is my main concern.... People HAVE and CAN run the 18G WITH the stock injectors, but at what cost? Will this cause damage? People have said that it could lead to detonation, and I don't know about you but I don't want my brand new car blowing up anytime soon... I still have another 5 years to pay it off, so I need it to last until then... I mean, running your injectors at maximum efficiency sounds like you're gonna make them sweat a lot and eventually they will poop out on you... But I'm a newbie, so maybe my theory is just in my head and not realistic.... Any thoughts anyone?
ChrisCJ99 is offline   Reply With Quote
Old 08-02-2006, 11:26 PM   #14
ChrisCJ99
Scooby Specialist
 
Member#: 120647
Join Date: Jul 2006
Chapter/Region: South East
Location: Tampa, FL
Vehicle:
2006 WRX
Charcoal Grey

Default

And the way it seems to be going, I'm leaning more towards the VF34.... I know it won't get me as much power as an 18G or 20G, but atleast I won't have to upgrade my injectors and worry about daily drivability... I know you can pick up a used VF39, which is practically the same as the VF34, for pretty cheap but the way I see it why not just pay a little bit more and get a BRAND NEW turbo that ISN'T cracked (cause ALL the VF39s I've seen have been cracked) and get a pretty nice turbo that'll be relatively safe on your daily driver... Thoughts?
ChrisCJ99 is offline   Reply With Quote
Old 08-02-2006, 11:33 PM   #15
Chris_M
Scooby Specialist
 
Member#: 116665
Join Date: Jun 2006
Chapter/Region: BAIC
Location: Modesto, CA
Vehicle:
2016 STI
WRB

Default

Keep in mind though that the 18g the VF39 and the VF34 are all three practicly the same. Now if you step to the 20 then that's a different story.
Chris_M is offline   Reply With Quote
Old 08-03-2006, 12:01 AM   #16
import111
Scooby Specialist
 
Member#: 24447
Join Date: Sep 2002
Chapter/Region: SWIC
Location: Tucson, Arizona
Vehicle:
2016 Mustang GT w/PP
Red

Default

Quote:
Originally Posted by Chris_M
Keep in mind though that the 18g the VF39 and the VF34 are all three practicly the same. Now if you step to the 20 then that's a different story.
Umm, the 18g is noticably bigger than the VF39 and VF34.
import111 is offline   Reply With Quote
Old 08-02-2006, 11:28 PM   #17
rpolloc9
Scooby Newbie
 
Member#: 121343
Join Date: Jul 2006
Vehicle:
06 WRX
Black

Default

My tuner said he could mod (or do a core exchange) my current injectors pretty cheap and they will work great for the 18g.
rpolloc9 is offline   Reply With Quote
Old 08-02-2006, 11:38 PM   #18
rpolloc9
Scooby Newbie
 
Member#: 121343
Join Date: Jul 2006
Vehicle:
06 WRX
Black

Default

ChrisCJ99 I recommend you call your tuner, Cobb, and/or FP and ask them yourself.
rpolloc9 is offline   Reply With Quote
Old 08-03-2006, 12:11 AM   #19
kn0bby8
Scooby Specialist
 
Member#: 97644
Join Date: Oct 2005
Chapter/Region: Tri-State
Location: Back In NY
Vehicle:
2006 WRX
Black

Default

I drove an 06 with a 18g about half an hour ago. I htink the only mods done to the car I just drove were the turbo and fuel pump. There could definatly be more pushed out of the car but it was no slouch. Felt much faster than my stage 2 with header and tmic.

My opinion is that it depends on the tuner. There is someone running a 20g on the stock injectors and making good power. What it comes down to is that if your tuner can not tune the 18g on the stock injectors than you need to upgrade!
kn0bby8 is offline   Reply With Quote
Old 08-03-2006, 12:33 AM   #20
06BLUEREX
Scooby Newbie
 
Member#: 120000
Join Date: Jul 2006
Default

another reason as to why i am going to be running meth/water injection to lower my injectors idc
06BLUEREX 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
18g on 02 wrx with stock tranny Anup Transmission (AT/MT) & Driveline 2 03-27-2009 05:00 PM
18g on 06 wrx ? Slowbaru06 Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 15 03-02-2009 07:48 PM
18G On 08 wrx 08Pearlhatch Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 50 11-13-2008 08:10 PM
18G Turbo on 2006 wrx stock injectors subylove8 Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 18 03-13-2008 03:29 AM
simple question about 18g and 2006 wrx wrxcop06 Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 5 10-05-2006 10:07 AM

All times are GMT -4. The time now is 02:19 PM.


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.