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Old 06-27-2010, 11:41 AM   #1
Scooby Newbie
Member#: 129895
Join Date: Oct 2006
Default DOHC 2.5 injector upgrade???

I'm looking for a small upgrade for my DOHC 2.5 red top injectors. I have searched but have not found anything clear about if there is anything that will fit into my fuel rails and is in the 400 to low 500 cc range. Sorry if this has been covered before, just trying to get some solid info.
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Old 06-27-2010, 08:59 PM   #2
Scooby Specialist
Member#: 80465
Join Date: Jan 2005
Chapter/Region: RMIC
Location: Bailey, CO
2001 2.5RS
Black Diamond Pearl


Are you getting more air than usual? What are the current mods? Unless you have quite a wild build, you won't need bigger injectors. Fill out your profile.
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Old 06-28-2010, 04:34 PM   #3
Scooby Newbie
Member#: 129895
Join Date: Oct 2006

Running this in a circle track stock car. Started off as 95 Impreza, but it is mixed and matched parts from different models and years. Running 97 Dohc 2.5 in it with a 5 speed. Trying to tune my car using a AFR gauge, i'm finding that the car is running about 15.1. I have after market electric fuel pump coming from a fuel cell, so that is not limiting me. I figured going with next size up injectors will bring me back into the lower 14s on the AFR gauge.
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Old 06-28-2010, 07:38 PM   #4
Patrick Olsen
NASIOC Supporter
Member#: 120
Join Date: Jul 1999
Chapter/Region: AKIC
Location: Where the Navy sends me...
1997 Legacy 2.5GT
1996 Impreza coupe


Sumthin' ain't right with your combo of parts. Even with ported heads, reground cams, etc etc, my '97 DOHC EJ25 still ran rich. As I recall I had to pull 15% or so with the S-AFC at the top end. The engine made 50% more power than stock at redline, yet was still rich using a completely stock fuel system.

Pat Olsen
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