ECU reset after silencer removal? - Subaru WRX Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 17 Old 05-31-2004, 02:02 PM Thread Starter
WRXtuners Member
 
Join Date: May 2004
Location: Massachusetts
Posts: 45
Nytmare is an unknown
Send a message via AIM to Nytmare
Question ECU reset after silencer removal?

Hey guys I know that the silencer removal doesn't add any power, I did it a few weeks back.

However, I'm talking to someone now who says he's heard that if you reset the ECU after taking the silencer out, that some wrx guys have told him that there's a noticable increase in performance. Does this make any sense? Thanks!

2004 Java Black Pearl WRX Sedan
-17" BBS rims
-Subaru short throw shifter
-Brushed aluminum interior pieces
-All the goodies, MUCH more to come!
Nytmare is offline  
Sponsored Links
Advertisement
 
post #2 of 17 Old 05-31-2004, 02:06 PM
WRXtuners Member
 
Tut4u2's Avatar
 
Join Date: Jun 2003
Location: Virginia
Posts: 1,995
Images: 11
Tut4u2 is an unknown
Send a message via AIM to Tut4u2
If you add a panel filter like K&N or Perrin then you will get more Horsepower.

Che
Tut4u2 is offline  
post #3 of 17 Old 05-31-2004, 05:35 PM
WRXtuners Member
 
lobsterhat's Avatar
 
Join Date: Dec 2002
Location: Washington
Posts: 207
Images: 15
lobsterhat is an unknown
Whenever you reset the ECU, it has to "re-learn" how you drive the car. So, if you've done something that may increase horsepower, it's a good idea, so it can learn how to run the car with the added flow, etc..

256 WHP on Mustang dyno that measures Stockers at 167.
lobsterhat is offline  
post #4 of 17 Old 05-31-2004, 09:01 PM
WRXtuners Member
 
Tut4u2's Avatar
 
Join Date: Jun 2003
Location: Virginia
Posts: 1,995
Images: 11
Tut4u2 is an unknown
Send a message via AIM to Tut4u2
If you just take out the silencer then the amount of air going in shouldn't that much, seeing how the same airfilter resides in the airbox.

Che
Tut4u2 is offline  
post #5 of 17 Old 06-01-2004, 08:22 AM
WRXtuners Member
 
Cosmo's Avatar
 
Join Date: Dec 2002
Location: Virginia
Posts: 4,591
Images: 15
Cosmo is known to be trustworthy and helpful Cosmo is known to be trustworthy and helpful
Send a message via AIM to Cosmo
There really isn't much difference between the stock intake system and one without a silencer. But, I recommend resetting your ECU every 5-10k miles anyways.
Cosmo is offline  
post #6 of 17 Old 06-01-2004, 08:51 AM
 
IBAUCLAPlaya's Avatar
 
Join Date: Oct 2003
Location: Ohio
Posts: 3,488
Images: 8
IBAUCLAPlaya is known to be trustworthy and helpful IBAUCLAPlaya is known to be trustworthy and helpful
Send a message via AIM to IBAUCLAPlaya
Which lead do you take off the battery, one w/ red cover? Also how long do you have to keep it off?
IBAUCLAPlaya is offline  
post #7 of 17 Old 06-01-2004, 08:54 AM
WRXtuners Member
 
Cosmo's Avatar
 
Join Date: Dec 2002
Location: Virginia
Posts: 4,591
Images: 15
Cosmo is known to be trustworthy and helpful Cosmo is known to be trustworthy and helpful
Send a message via AIM to Cosmo
Take off the negative lead. Leave it off for 30 seconds or so, and step on the brake pedal while it's off.
Cosmo is offline  
post #8 of 17 Old 06-02-2004, 02:51 AM
WRXtuners Member
 
Solice's Avatar
 
Join Date: May 2004
Location: Pennsylvania
Posts: 242
Solice is an unknown
Send a message via AIM to Solice Send a message via Yahoo to Solice
I have kind of a stupid question. I'm not real literate as far as working on cars by myself (I'm a network tech, not a car tech LOL). That's why I'm learning as much as possible about the Rex. I found this online:
http://www.geocities.com/forcedinduc...esilencer.html
It seems like a pretty good walk through but I'm still hesitant on trying it myself. In all honesty, for someone like me is this still an easy job? I just don't want to screw anything up. Thanks ahead of time!

-Solice

Last edited by Solice; 06-02-2004 at 03:56 AM.
Solice is offline  
post #9 of 17 Old 06-02-2004, 08:12 AM
WRXtuners Member
 
Cosmo's Avatar
 
Join Date: Dec 2002
Location: Virginia
Posts: 4,591
Images: 15
Cosmo is known to be trustworthy and helpful Cosmo is known to be trustworthy and helpful
Send a message via AIM to Cosmo
That's pretty accurate.
Cosmo is offline  
post #10 of 17 Old 03-14-2005, 11:34 PM
WRXtuners Member
 
Join Date: Jan 2005
Location: New Jersey
Posts: 337
gingertooth is an unknown
well I just did the silencer removal and haven't noticed any sound difference. just a little more whistling from the turbo. I also put in a perrin foam filter as well. I also used the delete elbow from gp moto too. For $40 it's worth it. With only 600 miles on my 05' it's hard to say anything has changed even if it is a slight difference.I don't think I have broken it in yet either, but I did reset the ecu for the hell of it and I do noticed spooling is a little sluggish right now and my 1st gear feels like it takes longer to spool, which I kind of like, cause before that 1st just shot up too fast. Does any of this sound right to anyone. It's only what I have noticed considering i only have 600 miles on it..
gingertooth is offline  
post #11 of 17 Old 03-15-2005, 05:34 PM
Registered User
 
wrecker83's Avatar
 
Join Date: Jun 2004
Location: California
Posts: 155
wrecker83 is an unknown
That whistle is the "sound difference". its a lot louder on the outside of the car IMO, i can actually hear everything when im drivin down an alleyway or something of that sort. its not real loud, but if your music is off its hearable.
wrecker83 is offline  
post #12 of 17 Old 03-15-2005, 07:25 PM
Ian
Moderator
 
Ian's Avatar
 
Join Date: Dec 2003
Location: Connecticut
Posts: 2,722
Images: 9
Ian is more helpful than not
Send a message via AIM to Ian
Quote:
Originally Posted by Cosmo
Take off the negative lead. Leave it off for 30 seconds or so, and step on the brake pedal while it's off.
Hey Cosmo what does stepping on the brake pedal do? I noticed a difference when I do the ECU reset unless it's in my head?
Ian is offline  
post #13 of 17 Old 03-15-2005, 07:30 PM
WRXtuners Member
 
Jave's Avatar
 
Join Date: Nov 2004
Location: Oklahoma
Posts: 1,577
Images: 6
Jave is more helpful than not
stepping on the brake makes sure that all the power is drained. Or at least that is what I figured it would do.
Jave is offline  
post #14 of 17 Old 03-16-2005, 09:19 AM
WRXtuners Member
 
Rain_Racer's Avatar
 
Join Date: Jul 2004
Location: Texas
Posts: 453
Rain_Racer is an unknown
Definatly even if you do no mods reset the ECU after you break the car in... you wouldn't want that ECU thinking that you are a driver that lkes to keep it under 4k RPM

One thing I did that made a HUGE difference is reset my ECU at the 1/8th mile track, then did about 10 passes in one night. The car just feels a lot faster now... not to mention my 9.32 pass was that night.
Rain_Racer is offline  
post #15 of 17 Old 03-16-2005, 12:18 PM
WRXtuners Member
 
Join Date: Jan 2005
Location: New York
Posts: 350
Images: 5
absolutexk is an unknown
Send a message via AIM to absolutexk
So, to reset the ECU, i just take off the negative terminal clap, press the brake, leave it off for 30 seconds, and then connect the negative back on, and start the engine??
absolutexk is offline  
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 On
Trackbacks are On
Pingbacks are On
Refbacks are On