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

hood scoop swap w/wrx...how much performance sacrificed

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Old May 1, 2004 | 11:07 PM
  #2  
SlickmisterN's Avatar
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Joined: Apr 2003
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From: LIC Motorsports
Car Info: 2004 Black/Gold STi
I doubt you have any problems with overheating. But I think you would lose quit a bit of horses.
Old May 2, 2004 | 11:34 PM
  #4  
SlickmisterN's Avatar
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From: LIC Motorsports
Car Info: 2004 Black/Gold STi
Im pretty sure you can swap with just an RS hood. It has no scoop at all.
http://www.autobytel.com/content/res...s_id_int/30725
Old May 3, 2004 | 05:15 PM
  #6  
meilers's Avatar
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From: Phoenix, AZ
Car Info: Subaru Impreza WRX 2002
Originally posted by SlickmisterN
Im pretty sure you can swap with just an RS hood. It has no scoop at all.
http://www.autobytel.com/content/res...s_id_int/30725
No, you don't want an intercooler without any airflow -- you'd be HEATING the intercooler with air from the engine compartment, not cooling the turbo air like you are supposed to. Even with a FMIC I'd keep a slot in the hood to allow for air to circulate, the STI engine runs HOT HOT HOT.

My 02 non-STI WRX runs so hot under the hood that it keeps oil and engine temp for two full hours after I turn the car off. I can get in the car and turn the key and the temp gauge will be sitting right at the 48% mark, just like I was driving on the highway. With that much heat in the compartment, you have to have some type of venting.

Oh, and BTW, adding a FMIC will make your STI look MORE like a rally car, not less
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