Engine/Power - EJ25T (STI and 2006+ WRX) Discussions about the USDM 2006+ WRX and WRX STi 2.5 liter turbo flat-four.

mods to my STI - part suggestions?

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Old Oct 24, 2005 | 10:25 PM
  #1  
cpc993's Avatar
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Joined: Oct 2005
Posts: 29
From: CA
Car Info: WRS STI 2006
mods to my STI - part suggestions?

I guess I want to do this to my STI now:
1. ECU
2. turbo upgrade
3. down pipe
4. catback exhaust
5. intake
6. injectors
7. fuel rail
8. NOS??

well im looking for sugestions on parts now and how my daily drive will be. I am not sure on what order this needs to be done in either. I was thinking of doing it all at once. Please let me know your thoughts.
Old Oct 24, 2005 | 11:42 PM
  #2  
thunder_sti's Avatar
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From: ***10 SEC CLUB*** 10.8@128mph w/clutch issues
Car Info: 04 STI--- 435awhp@Pump Gas **520awhp @ C16 Vp
1-7 sounds good....

8-boom!!!!


9- fmic and gauges
Old Oct 25, 2005 | 02:03 PM
  #3  
Thrillho's Avatar
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Posts: 61
From: Laurel, MD
Car Info: 94 Honda Accord...not for long
Originally Posted by thunder_sti

9- fmic and gauges
Definitely a necessity since you will be using a bigger turbo.

10 - Reflash

I wouldn't recommend doing all these mods at the same time since you might run into CEL problems and they could take more time trying to resolve that. Also keep in mind that improving driving skills and getting to know the car's abilities before the mods is a plus so that you can have an idea of how the car will handle in situations.
Old Oct 25, 2005 | 09:25 PM
  #4  
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Posts: 239
From: Austin, Tx
Car Info: 2009 xB
I've been checking on part also. Looks like the Cobb AccessPort would be a good choice to start off with. But as of yet not yet ready for the '06 model.
Old Nov 6, 2005 | 08:23 AM
  #5  
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Car Info: 03' Subaru Impreza WRX - R.I.P.
with a turbo upgrade, you should consider getting an upgraded fuel pump.
Old Nov 6, 2005 | 12:24 PM
  #6  
depdivr's Avatar
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Joined: Nov 2004
Posts: 376
From: Moved to Portland, OR
Car Info: 2005 Black WRX STI
Originally Posted by cpc993
I guess I want to do this to my STI now:
1. ECU
2. turbo upgrade
3. down pipe
4. catback exhaust
5. intake
6. injectors
7. fuel rail
8. NOS??

well im looking for sugestions on parts now and how my daily drive will be. I am not sure on what order this needs to be done in either. I was thinking of doing it all at once. Please let me know your thoughts.
You basically have the parts that you need but they are in the wrong order.

1. ECU - Go with a Ecuteck reflash or Cobb Accessport
2. Intake, Downpipe, Catback
3. Remap
4. Fuelpump, fuel rails, injectors, braided fuel lines
5. Remap
--- Throw in gauges (EGT, Oil temp, boost)
6. Boost Control
7. Turbo, FMIC, BOV
8. Remap

Congrats, your running a stage 4 sti - probibly putting down 320 to 380 whp on pump gas depending on your agressivness of tune, quality of gas and size of turbo. At this point you may realize that your oil is running warm (above 220) - install an oil cooler, target oil temp around 200.

Is this a track car or daily driver? Reguardless, don't ignore your suspension and breaking.

1) Coil over dampening
2) Front and rear swaybars
3) Endlinks
4) Stainless breaklines
5) Upgrade pads

Thats just my opinion... if you want to get to a stage 4 with solid tuning look to spend some cash on high quality components.
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