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Old 04-06-2002, 05:39 PM   #1
Scooby Newbie
Member#: 5982
Join Date: Apr 2001
Location: Calgary, Alberta, Canada
01 impreza rs

Default Bigger fuel injectors?

Does anyone know if putting in a high flow fuel pump and bigger injectors will help with getting more hp from the ej25? Just looking at all possiblities for getting more out of the engine. Have the CAI and SPG mods but its not enough. Not looking to make a beast just want to keep up to my buddies GTI VR6. Say about 185 hp would be nice. If their is anyway to get that hp without getting the cams or modding other internals of the engine would be nice. I've heard the lightened pulley set also helps a little. Is it possible? Any suggestions that don't break the bank would be nice.
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Old 04-06-2002, 05:50 PM   #2
Jesse Lorenzen
Scooby Newbie
Member#: 14962
Join Date: Feb 2002
Location: WA
2008 Impreza 2.5i


If you get a Cold Air intake, high flow muffler and a lightened pulley set you should be around 185 HP without touching the motor and if you go the value route for only a little over $500.
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Old 04-07-2002, 10:13 AM   #3
Scooby Specialist
Member#: 1839
Join Date: Jul 2000
Chapter/Region: VIC
Location: at home

I don't think that a bigger fuel pump and injector will make any differences, unless you are turbocharging it.
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Old 04-07-2002, 12:24 PM   #4
Scooby Guru
Member#: 6551
Join Date: May 2001
Chapter/Region: MWSOC
Location: Carol Stream, IL
'01 GC8 Dinged STM
'09 Concours 14 ABS Black


upgrading the fuel system on a NA car(the RS) is pretty much assinine...the BSFC of the car is so low that it has a tendency to run super rich so all you are doing is taking small bits and pieces away. I don't think anyone here has maxed out their stock fuel system with street legal NA mods.

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