Welcome to the North American Subaru Impreza Owners Club Sunday January 25, 2015
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 > 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.
Reply
 
Thread Tools Display Modes
Old 01-19-2006, 11:54 PM   #1
billyr2.5
Scooby Specialist
 
Member#: 53663
Join Date: Jan 2004
Chapter/Region: SWIC
Location: scottsdale, az
Vehicle:
2011 WRX WR Blue
2000 Coupe, Sedona Red

Default 2002 wrx fuel pump in gc8?

putting a 2002 wrx fuel pump in a 2000 2.5rs...good idea or just Stupid?
* Registered users of the site do not see these ads.
billyr2.5 is offline   Reply With Quote
Old 01-21-2006, 01:59 AM   #2
billyr2.5
Scooby Specialist
 
Member#: 53663
Join Date: Jan 2004
Chapter/Region: SWIC
Location: scottsdale, az
Vehicle:
2011 WRX WR Blue
2000 Coupe, Sedona Red

Default

bump for any info
billyr2.5 is offline   Reply With Quote
Old 01-21-2006, 02:04 AM   #3
t3hWIT
Scooby Guru
 
Member#: 58779
Join Date: Apr 2004
Chapter/Region: MAIC
Location: **** Town
Vehicle:
95 STi RA (rhd)
98 Tacoma (300k Club)

Default

Good question. Wiring will almost definately have to be done, but thats not my specialty, I do wrenching. What kind of modifications do you have? The wrx fuel pump is usually reserved for boosting and engine swaps.
t3hWIT is offline   Reply With Quote
Old 01-21-2006, 02:42 AM   #4
billyr2.5
Scooby Specialist
 
Member#: 53663
Join Date: Jan 2004
Chapter/Region: SWIC
Location: scottsdale, az
Vehicle:
2011 WRX WR Blue
2000 Coupe, Sedona Red

Default

just normal bolt ons, intake, exhaust, intake manifold spacer, underdrive pulley, clutch, and kaaz close ratio gear set...but i am soon going to get cams and then eventually port and polish the heads
billyr2.5 is offline   Reply With Quote
Old 01-21-2006, 02:43 AM   #5
Handsdown
Scooby Guru
 
Member#: 29355
Join Date: Nov 2002
Chapter/Region: NWIC
Location: seattle
Vehicle:
2003 GD6 Hate chall
but i'mma maintain

Default

even with cams the stock fuel system should be well within acceptable limits of handling the load. i've seen and heard of cars going many years without fuel problems even with more mods than you have listed.

not to say it's not worth it, but... it's not worth it.
Handsdown is offline   Reply With Quote
Old 01-21-2006, 02:47 AM   #6
2slofouru
Scooby Specialist
 
Member#: 90539
Join Date: Jul 2005
Chapter/Region: South East
Location: somewhere east of CA
Vehicle:
95 L with ej257k
powa, Raven R6

Default

I've got an 04 wrx pump running in my 95L with 98dohc engine and 2.25 exhaust with no problems. I soldered mine in. Didn't make the car run any better or worse than with the stock 1.8L pump, but I'm sure I saved some serious weight considering the stock L pump was about twice the size. That has to help my 0-60!
2slofouru is offline   Reply With Quote
Old 01-21-2006, 03:28 AM   #7
billyr2.5
Scooby Specialist
 
Member#: 53663
Join Date: Jan 2004
Chapter/Region: SWIC
Location: scottsdale, az
Vehicle:
2011 WRX WR Blue
2000 Coupe, Sedona Red

Default

did you have to tune the ecu to the rex fuel pump?
billyr2.5 is offline   Reply With Quote
Old 01-21-2006, 03:57 AM   #8
2slofouru
Scooby Specialist
 
Member#: 90539
Join Date: Jul 2005
Chapter/Region: South East
Location: somewhere east of CA
Vehicle:
95 L with ej257k
powa, Raven R6

Default

I have the stock 1.8 ecu. I don't think there is enough extra volume to justify tuning by changing to the wrx pump. The fuel pressure regulator will dump the excess fuel if there is any.
2slofouru is offline   Reply With Quote
Old 01-22-2006, 03:05 AM   #9
solbey11
Scooby Specialist
 
Member#: 89234
Join Date: Jun 2005
Default

Your ECM will recognize the added pressure in the fuel system. So in return it will reduce the dwell time of your fuel injectors to ensure you will still have the proper A/F mixture. And your fuel pressure regulator will bleed off most excess pressure.
solbey11 is offline   Reply With Quote
Old 01-22-2006, 11:40 AM   #10
2slofouru
Scooby Specialist
 
Member#: 90539
Join Date: Jul 2005
Chapter/Region: South East
Location: somewhere east of CA
Vehicle:
95 L with ej257k
powa, Raven R6

Default

I don't think the gc8 models have a fuel pressure sensor(at least mine and the others I've seen don't). The ecu only knows how much fuel is being spent by reading the o2 sensor, correct? I've never seen fuel pressure sensor wires in any of the ecu diagrams I've checked. Anyone else know?
2slofouru is offline   Reply With Quote
Old 01-22-2006, 12:40 PM   #11
solbey11
Scooby Specialist
 
Member#: 89234
Join Date: Jun 2005
Default

Quote:
Originally Posted by 2slofouru
I don't think the gc8 models have a fuel pressure sensor(at least mine and the others I've seen don't). The ecu only knows how much fuel is being spent by reading the o2 sensor, correct? I've never seen fuel pressure sensor wires in any of the ecu diagrams I've checked. Anyone else know?
Actually that's what I meant. I just read it again and it does sound like I meant it had a sensor. But you are right, from the A/F or O2 sensor, it determines if it's running the engine lean or rich.
solbey11 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
2002 WRX Fuel pump. 2000 miles old mattjk Engine/Power/Exhaust 3 08-05-2009 11:58 PM
wrx fuel pump in 99rs??? beaun-nus Subaru Conversions 7 06-12-2007 08:39 PM
wrx fuel pump in 98 impreza L? rufracer Normally Aspirated Powertrain 6 04-08-2007 01:59 PM
sti fuel pump in gc8 body?? sith Subaru Conversions 2 06-24-2006 04:49 PM
WRX fuel pump in 98 RS? IllNastyImpreza Normally Aspirated with bolt-on Forced Induction Powertrain 4 05-30-2004 11:56 AM


All times are GMT -4. The time now is 03:24 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.