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

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 10-31-2006, 10:06 AM   #1
All4bSpinnin
Scooby Guru
 
Member#: 99102
Join Date: Oct 2005
Chapter/Region: South East
Location: Jax, FL
Vehicle:
17 BMW M2
Long Beach Blue 6MT

Default intake, downpipe, header and no tune... what is the stock ecu going to do?

ok, ive got a header and a downpipe about to go on the sti. Im wondering how safe its gonna be on stock ecu with no tune since i woulnt be able to get a utec for a month or so.

should i get a CEL fix for the downpipe?
* Registered users of the site do not see these ads.
All4bSpinnin is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 10-31-2006, 06:21 PM   #2
bcblues
Scooby Specialist
 
Member#: 17256
Join Date: Apr 2002
Chapter/Region: South East
Location: America's Outback
Vehicle:
18 Outback
on the road....

Default

It will adjust. You will leave a lot on the table without a tune, though. CEL fix if you need it. I am running the defoulers and they seem to work fine.
bcblues is offline   Reply With Quote
Old 11-01-2006, 03:57 AM   #3
jaxscuby
Sammo Hung
Moderator
 
Member#: 10613
Join Date: Sep 2001
Chapter/Region: South East
Location: N Fla / S Ga
Vehicle:
2002 USDM WRX
WRB

Default

it will run rich, just like factory afr.
i did the same thing..black tail pipe
will be evident.
jaxscuby is offline   Reply With Quote
Old 11-01-2006, 10:16 AM   #4
All4bSpinnin
Scooby Guru
 
Member#: 99102
Join Date: Oct 2005
Chapter/Region: South East
Location: Jax, FL
Vehicle:
17 BMW M2
Long Beach Blue 6MT

Default

update: i put the downpipe on yesterday with no CEL fix. The car hasnt thrown a check engine light yet so i guess thats good. however, it does feel like its getting a very slight stumble taking off in first gear. I wonder what its doing??? Searching to correct afr?

also, what does the ecu do when you mess around with these cars? ive been reading into the subaru ecu stuff and from what i understand the ecu has a low detonation and a high detonation map as well as two timing maps. so does it switch over to high det whenever u put on a downpipe?
All4bSpinnin is offline   Reply With Quote
Old 11-01-2006, 12:32 PM   #5
hondaeater69
Scooby Guru
 
Member#: 60324
Join Date: Apr 2004
Location: soon to be somewhere else
Vehicle:
1998 RS

Default

putting on a DP wouldn't by itself cause the ecu to switch to high det. high det will cause it to switch to the high det map though

and you will throw a CEL eventually...

and the stumble is probably from the intake, i would suggest a tune for that.
hondaeater69 is offline   Reply With Quote
Old 11-01-2006, 01:05 PM   #6
Tgui
Scooby Specialist
 
Member#: 44771
Join Date: Oct 2003
Default

Why don't you play it safe and flash your ECU ala:
www.openecu.org
www.tactrix.com

and if you want to tweak your map some, lower boost etc.
www.enginuity.org

Cheap egt
http://www.jegs.com/webapp/wcs/store...chItemId=79699

Guage bezel, insert EGT and you can move your stock boost guage into the other side, I did it, doesn't look too hokey.
http://www.fastwrx.com/dugadabe.html

Wide band
http://www.zeitronix.com/Products/zt2/zt2.htm

$80 for cable, free tunes
$125 for cheap egt
$79 guage bezel
$279 wideband

total: $563

Utec what?

PS I own a Utec.
Tgui is offline   Reply With Quote
Old 11-02-2006, 03:21 AM   #7
All4bSpinnin
Scooby Guru
 
Member#: 99102
Join Date: Oct 2005
Chapter/Region: South East
Location: Jax, FL
Vehicle:
17 BMW M2
Long Beach Blue 6MT

Default

Quote:
Originally Posted by Tgui View Post
Why don't you play it safe and flash your ECU ala:
www.openecu.org
www.tactrix.com

and if you want to tweak your map some, lower boost etc.
www.enginuity.org

Cheap egt
http://www.jegs.com/webapp/wcs/store...chItemId=79699

Guage bezel, insert EGT and you can move your stock boost guage into the other side, I did it, doesn't look too hokey.
http://www.fastwrx.com/dugadabe.html

Wide band
http://www.zeitronix.com/Products/zt2/zt2.htm

$80 for cable, free tunes
$125 for cheap egt
$79 guage bezel
$279 wideband

total: $563

Utec what?

PS I own a Utec.
this is exactly what ive been reading about for the past 3 days. interesting stuff. i will most likely go this route.

also, the downpipe did throw a code earlier today so i picked up a fix. problem solved.
All4bSpinnin is offline   Reply With Quote
Old 11-02-2006, 03:46 AM   #8
cbean
Scooby Newbie
 
Member#: 57387
Join Date: Mar 2004
Chapter/Region: SCIC
Location: Orange county
Vehicle:
02 wrxwagon
PSM

Default

Umm, you purchased a $34000.00 car...You decided to dump a couple of hundred dollars in parts on it, I am assuming that you researched things on nasioc a little bit...I am wondering why you are stalling on some kind of engine managment? Everywhere I have researched about our cars, the first thing anyone mentions is EM. Not that I am a Cobb guy, but 600 bucks and you have a device that will flash stage0 - stage 2 maps, this may be the 600 dollars that saves you a $7000.00 rebuild. I think you should do your mods correctly...There are alot of incredibly smart people on here who have modded many a subaru, and have mucho info on what works and what does not...
I am not one of those incredibly smart ones, and I may sound like a Richard Nixion...Sorry...You have a great car, and it looks like your gonna go the half ass route, and I would hate to see you make a sheet sandwich and half to eat it.

I think you would be incredibly surprise at the performce of your car stock, to this downpipe, to downpipe with a tune...In the end I bet you would find the best performs would be...In numerical order....1. Downpipe with a tune 2. Stock 3. ( and very last ) downpipe
cbean is offline   Reply With Quote
Old 11-02-2006, 10:19 AM   #9
All4bSpinnin
Scooby Guru
 
Member#: 99102
Join Date: Oct 2005
Chapter/Region: South East
Location: Jax, FL
Vehicle:
17 BMW M2
Long Beach Blue 6MT

Default

Quote:
Originally Posted by cbean View Post
Umm, you purchased a $34000.00 car...You decided to dump a couple of hundred dollars in parts on it, I am assuming that you researched things on nasioc a little bit...I am wondering why you are stalling on some kind of engine managment? Everywhere I have researched about our cars, the first thing anyone mentions is EM. Not that I am a Cobb guy, but 600 bucks and you have a device that will flash stage0 - stage 2 maps, this may be the 600 dollars that saves you a $7000.00 rebuild. I think you should do your mods correctly...There are alot of incredibly smart people on here who have modded many a subaru, and have mucho info on what works and what does not...
I am not one of those incredibly smart ones, and I may sound like a Richard Nixion...Sorry...You have a great car, and it looks like your gonna go the half ass route, and I would hate to see you make a sheet sandwich and half to eat it.

I think you would be incredibly surprise at the performce of your car stock, to this downpipe, to downpipe with a tune...In the end I bet you would find the best performs would be...In numerical order....1. Downpipe with a tune 2. Stock 3. ( and very last ) downpipe
haha /rant

i think the only thing im doing that could be considered "half assed" would be looking into tuning this car with an aftermarket device that is not well known. however it is doing the same thing as ecutek without a couple small features.

personally i dont see why anyone would wanna pay 900$ to get a 2 hr ecutek tune...get real! imho thats highway robbery, and these people continue to pay for this stuff so prices go up. a suby tune should cost just labor, but shops are charging a flat fee on top of labor! its b/s.

this leads me to another point, just because i spent 32k on my sti doesnt mean that i have to spend tons of money getting name brand parts and payin assloads of money for 40 more hp.

i started out with a wrx that had a vf30, pinks, sti tmic, utec, up, dp hks hi power, and gt spec header. send a pm to blueandgold and ask him if i took any shortcuts on that car. ive been driving subarus for over a year, ive done everything from port work to transmission swaps and repairs. i know the cars i know how they make their power (tune). god knows i spend tons of time surfing these forums! my whole thing is that i hate goin slow and i dont have gobs of money to throw into the car so i do small mods at a time, this time it was the dp, next is catback then tune. im going to go stage 2 for 600$ ARE YOU???? i'll put the rest of the money into a fp green, injectors, etc

trust me, the sti will be just as fast and as nice as any other stage 2 car out there, with no shortcuts.
All4bSpinnin is offline   Reply With Quote
Old 11-02-2006, 10:55 AM   #10
Tgui
Scooby Specialist
 
Member#: 44771
Join Date: Oct 2003
Default

Be sure to post pics/timeslips/dyno charts when you get things going.

BTW, if you need help with some of that open source tuning stuff, I contribute to enginuity and know there are some really knowledgeable people that can help. (I can tune, but I just know the basics).
Tgui is offline   Reply With Quote
Old 11-02-2006, 11:32 AM   #11
cbean
Scooby Newbie
 
Member#: 57387
Join Date: Mar 2004
Chapter/Region: SCIC
Location: Orange county
Vehicle:
02 wrxwagon
PSM

Default

Ummm, sorry if I hurt your ego. With all of this modifaction expertise you seem to have, you OG post seems odd. I could care less what parts you have, and what major label tune you get...
Just becasue you spend 32000 for your STi, or 24000 for a WRX does mean you plan out your mods so you do not firetruck up your car...you do this becasue you do not have "gobs" of money.

you do not need to reply to this, my ego is not on the line, I will quietly walk away now.

Good luck. Cool car you bought.
cbean is offline   Reply With Quote
Old 11-02-2006, 06:23 PM   #12
All4bSpinnin
Scooby Guru
 
Member#: 99102
Join Date: Oct 2005
Chapter/Region: South East
Location: Jax, FL
Vehicle:
17 BMW M2
Long Beach Blue 6MT

Default

Quote:
Originally Posted by Tgui View Post
Be sure to post pics/timeslips/dyno charts when you get things going.

BTW, if you need help with some of that open source tuning stuff, I contribute to enginuity and know there are some really knowledgeable people that can help. (I can tune, but I just know the basics).
cool!!!!!! thanks, i'll be givin ya a shout here soon when i get my cable
All4bSpinnin is offline   Reply With Quote
Old 11-02-2006, 06:28 PM   #13
All4bSpinnin
Scooby Guru
 
Member#: 99102
Join Date: Oct 2005
Chapter/Region: South East
Location: Jax, FL
Vehicle:
17 BMW M2
Long Beach Blue 6MT

Default

Quote:
Originally Posted by cbean View Post
Ummm, sorry if I hurt your ego. With all of this modifaction expertise you seem to have, you OG post seems odd. I could care less what parts you have, and what major label tune you get...
Just becasue you spend 32000 for your STi, or 24000 for a WRX does mean you plan out your mods so you do not firetruck up your car...you do this becasue you do not have "gobs" of money.

you do not need to reply to this, my ego is not on the line, I will quietly walk away now.

Good luck. Cool car you bought.
anyways... if u have any advice on tactrix cables, enginuity, ecuflash or have tuning experience be sure to let me know. sry if i seemed arrogant im just trying to get helpful info on my situation
All4bSpinnin is offline   Reply With Quote
Old 11-02-2006, 07:13 PM   #14
Trigun001
Scooby Specialist
 
Member#: 107092
Join Date: Feb 2006
Chapter/Region: Tri-State
Location: Ossining, NY
Vehicle:
2005 WRX Evo3 16g
Platinum Silver Metallic

Default

I was worried when I had aftermarket intake and downpipe to run the car hard on my 05 wrx without a tune. Headers!! on an 06! id get that tune asap. At least dont put them on until like the day b4 the tune. the downpipe will make ur engine run hotter and without the O2 sensor youll run rich and hit limp mode eventually. The DAY of my tune (id put the downpipe on the day b4) (downpipe had a bung for the O2 sensor and a cat in it) i let my friend drive without me and when he backed out of my parking spot bottomed out on a storm drain. The O2 sensor bent in half and stoped working. So i limped to my tuner and he fixed it all. Im just a big worrier but u know whatever u do is not terrible just watch out on those headers.

Quote:
Originally Posted by All4bSpinnin View Post

personally i dont see why anyone would wanna pay 900$ to get a 2 hr ecutek tune...get real! imho thats highway robbery, and these people continue to pay for this stuff so prices go up. a suby tune should cost just labor, but shops are charging a flat fee on top of labor! its b/s.
P.S I went with EcuTek for 750$ on the tune 250 on labor (they put in my uppipe) and another 185 on a dyno (that I didnt ask them to do which is geigh). While expensive, my philosophy is if your going to do something do it right.

P.P.S it really is highway robbery.. life just sucks like that.
Trigun001 is offline   Reply With Quote
Old 11-02-2006, 09:54 PM   #15
All4bSpinnin
Scooby Guru
 
Member#: 99102
Join Date: Oct 2005
Chapter/Region: South East
Location: Jax, FL
Vehicle:
17 BMW M2
Long Beach Blue 6MT

Default

Quote:
Originally Posted by Trigun001 View Post
I was worried when I had aftermarket intake and downpipe to run the car hard on my 05 wrx without a tune. Headers!! on an 06! id get that tune asap. At least dont put them on until like the day b4 the tune. the downpipe will make ur engine run hotter and without the O2 sensor youll run rich and hit limp mode eventually. The DAY of my tune (id put the downpipe on the day b4) (downpipe had a bung for the O2 sensor and a cat in it) i let my friend drive without me and when he backed out of my parking spot bottomed out on a storm drain. The O2 sensor bent in half and stoped working. So i limped to my tuner and he fixed it all. Im just a big worrier but u know whatever u do is not terrible just watch out on those headers.



P.S I went with EcuTek for 750$ on the tune 250 on labor (they put in my uppipe) and another 185 on a dyno (that I didnt ask them to do which is geigh). While expensive, my philosophy is if your going to do something do it right.

P.P.S it really is highway robbery.. life just sucks like that.

why all the caution when it comes to the header? i figured the biggest issue would be with the dp and the 02 sensor gettin funny readings and goin to limp mode. so what does the header do that i need to be careful about?

im glad someone finally agrees with me on the outrageous price of an ecutek reflash... and i put a cel fix n my downpipe and it fixed the check engine until i can get a tune
All4bSpinnin 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
removing utec do i need to get the stock ecu reflashed to stock phobos sti UTEC 12 09-07-2007 12:02 AM
What is the stock engine rated to? 04MustangGT Newbies & FAQs 6 11-04-2006 02:08 AM
What is the stock intake diameter? TexRex2002 Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 13 09-16-2003 06:30 PM
2 questions: Are STI brakes worth it? And can the stock fronts go to the rear? Silky Brakes, Steering & Suspension 29 03-26-2002 09:36 PM
('93-'01) what is the best power mod to do first for a MY99 RS? aarneson Impreza Forum 2 05-21-2001 07:37 PM

All times are GMT -4. The time now is 01:47 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.