EJ25 Swap Impreza

[SubaruJawn]

hey guys.

i was wondering if you could swap an EJ25 into an Impreza that never had the 2.5L ?

now i have put an EJ22 into a 99 outback installed like as if it was an EJ25, 1 minor issue avoided was the y-pipe now 96+ EJ22's have single port heads, i installed an older EJ22 that has dual port like an EJ25.

so could this be done backwards ? eJ25 into an EJ22 or EJ18 Impreza?



Not this is the 1999 Legacy Outback that originally had an EJ25

[fuji_production]

if it bolts up to the tranny and motor mount locations then your good to go...

[SubaruJawn]

i dont see why not its EJ series

[John]

Its almost a direct swap. There are a few minor differences along the way, but you already know all of them since you have done a 2.2 swap into an Outback.

The Legacy 2.2 cars share the same engine/electronics as Impreza 2.2 cars......and same with the 2.5s.

The only thing I would recommend doing is swaping in the 2.5 ECU with the 2.5 engine. The 2.5 ECU has better fuel mapping, and it doesn't have the rev limiter like the 2.2 ECU....but its not nessicary to do.

[John]

Here is a FAQ I wrote for the second gen Legacy, but the info crosses over to your Impreza as well.

Here is a list of non-turbo engines that can be fitted to any BD, BG, or BK Legacy. If an older non-OBDII engine is used, some modifications must be made for OBDII sensors.


EJ15

Used in Impreza GC1 series

Specifications

• Displacement: 1493 cc
• Bore: 85.0 mm
• Stroke: 65.8 mm
• Compression Ratio: 9.4:1 - 10.0
• Valvetrain: SOHC
• Fuel Delivery multi point fuel injection

EJ151
Horsepower: 97 PS (71 kW; 96 bhp) @ 6000 rpm
Torque: 129.4 N·m (95 lb·ft) @ 3600 rpm
EJ152
Horsepower: 102 PS (75 kW; 101 bhp) @ 5600 rpm
Torque: 136.3 N·m (101 lb·ft) @ 4000 rpm
EJ153
Horsepower: 95 PS (70 kW; 94 bhp) @ 5200 rpm
Torque: 140.2 N·m (103 lb·ft) @ 3600 rpm
EJ154
Horsepower: 100 PS (74 kW; 99 bhp) @ 5200 rpm
Torque: 142.0 N·m (105 lb·ft) @ 4000 rpm

EJ16

Usage:
Impreza 93-94 (JDM only) GC4 series
Impreza 93-06 (Europe & Middle East)
Impreza 93-97 (Australia)

Specifications

• Displacement: 1597 cc
• Bore: 87.9 mm
• Stroke: 65.8 mm
• Compression Ratio: 9.4:1 - 10.0:1
• Valvetrain: SOHC
• Fuel Delivery mpfi (carburetor in some locations)

Horsepower: 100 PS (74 kW; 99 bhp) @ 6000 rpm
Torque: 138.3 N·m (102 lb·ft) @ 4500 rpm

EJ18

Usage:
Impreza 93-99 GC6 series
Legacy (except USA) 90-96 BC2, BC3, BD2, BD3, BG3 series
Isuzu Aska (1990–1993)

Specifications

• Displacement: 1820 cc
• Bore: 87.9 mm
• Stroke: 75.0 mm
• Compression Ratio: 9.5:1 - 9.7:1
• Valvetrain: SOHC
• Fuel Delivery: single point fuel injection

EJ181
Horsepower: 110 PS (81 kW; 108 bhp) @ 6000 rpm
Torque: 149.1 N·m (110 lb·ft) @ 3200 rpm
EJ182
Horsepower: 115 PS (85 kW; 113 bhp) @ 6000 rpm
Torque: 154.0 N·m (114 lb·ft) @ 4500 rpm
EJ183
Horsepower: 120 PS (88 kW; 118 bhp) @ 5600 rpm
Torque: 163.8 N·m (121 lb·ft) @ 3600 rpm

EJ20

Specifications

• Displacement: 1994 cc
• Bore: 92.0 mm
• Stroke: 75.0 mm

EJ20D DOHC

1989 - 1999 Legacy JDM
150 hp (110 kW) BC - BF and BD - BG series

EJ20E SOHC

Legacy JDM

1989-1994 125 hp (93 kW) BC - BF series
1993-1999 135 hp (101 kW) BD - BG series
1998-2004 155 hp (116 kW) BE - BH series
2003-2009 140 hp (100 kW) BL - BP series

Impreza JDM

1993-1999 135 hp (101 kW) GC - GF series
2008-current 140 hp (100 kW) GH series

Isuzu Aska (1990–1993)

1989-1994 125 hp (93 kW)

EJ202 SOHC

2002 - 2008 Forester JDM SG series

EJ204 DOHC AVCS

Legacy JDM BL - BP series

2003-2009 190 hp (140 kW)

Impreza JDM GC - GF series

1993-1999 155 hp (116 kW)

EJ20N runs on compressed natural gas

EJ22

Usage

• 1995 - 2001 Impreza
• 1990 - 1999 Legacy
• 1995 - 1999 Outback

Specifications

Displacement: 2212 cc
Bore: 96.9 mm
Stroke: 75.0 mm
Compression Ratio: 9.5:1 - 9.7:1
Valvetrain: SOHC
Fuel Delivery: multi-point fuel injection

EJ221

Horsepower: 135 PS (99 kW; 133 bhp) @ 5800 rpm
Torque: 186.3 N·m (137 lb·ft) @ 4800 rpm

EJ222

Horsepower: 142 bhp (106 kW; 144 PS) @ 5600 rpm
Torque: 149 lb·ft (202 N·m) @ 3600 rpm

EJ22E

Horesepower: 135bhp (101kW) @ 5800 rpm
Torque: 140 ft·lbf (190 N·m) @ 4800 rpm

EJ25

Usage

• 1998 Impreza
• 1998 Forester
• 1996 - 2004 Legacy
• 1996 - 1999 Outback
• 2000 - 2004 Impreza 2.5RS & 2.5TS
• 2002 - 2004 Impreza Outback Sport
• 2000 - 2004 Forester
• 2003 - 2005 Baja

Specifications

• Displacement: 2457 cc
• Bore: 99.5 mm
• Stroke: 79.0 mm
• Compression Ratio: 9.5:1 - 10.0:1
• Fuel Delivery: multi point fuel injection

EJ25D

1996:

Horsepower: 155hp (116kW) @ 5600 rpm
Torque: 140 ft·lbf (190 N·m) at 2800 rpm

1996 - 1999

Horsepower: 165 hp (123 kW) @ 5600 rpm
Torque: 162 ft·lbf (220 N·m) at 4000 rpm

EJ251

Horsepower: 165hp (123kW) @ 5600RPM
Torque: 167 ft·lbf (226 N·m) @ 4000RPM

EJ252

Horsepower: 156hp (115kW)

EJ253

Horsepower: 173 hp (129 kW) @ 5600 rpm
Torque: 166 ft·lbf (225 N·m) @ 4000 rpm

EJ254

Horsepower: 165 (2006+ is 175hp)

information from http://en.wikipedia.org/wiki/Subaru_EJ_engine

[SubaruJawn]

nks john thats very helpful.

not i want the EJ253

[John]

The 253 has variable lift and drive by wire...so you would have to make nessicary accomidations.

[JDMmonstacpe86]

i just learned a whole lot off this thread. makes alot of sense an has what i need to know to do my swap. thanks alot for starting this. this forum has been more help then rs25 an ****** combined i think. easy readups an better subaru community. an the best part i like about this forum is that the scheme is black an green my fav colors together lol

[IGOTASUBARU]

We have a great team. We took the best of the best and gave them a home here. We have a no drama rule and we stand by it 100%.

[JDMmonstacpe86]

Ah i love it its my new home.