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Old 05-16-2009, 08:51 PM   #1
Aegean93L
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Impreza GC8 Jdm 2.5 Obd1 Sohc ???

I just swapped my 93 L with a 99 RS engine.
For now it's running great off the 1.8 ECU but I'm thinking I could get more out of it with a proper ECU.

Does anyone know if a SOHC N/A 2.5L OBD1 engine was ever offered in the JDM or any other markets?
I know it was offered in DOHC form but that is useless to me.

Cheers!
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Old 05-17-2009, 01:37 AM   #2
reddevil
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Quote:
Originally Posted by Aegean93L View Post
I
I know it was offered in DOHC form but that is useless to me.

Cheers!

Why is that useless?
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Old 05-17-2009, 01:44 AM   #3
decke48
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dohc, sohc its all the same to the ecu
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Old 05-17-2009, 09:38 AM   #4
Aegean93L
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Wirelessly posted (iPhone: Mozilla/5.0 (iPhone; U; CPU iPhone OS 2_1 like Mac OS X; en-us) AppleWebKit/525.18.1 (KHTML, like Gecko) Version/3.1.1 Mobile/5F136 Safari/525.20)

Quote:
Originally Posted by reddevil
Quote:
Originally Posted by Aegean93L View Post
I
I know it was offered in DOHC form but that is useless to me.

Cheers!

Why is that useless?
Because I have a SOHC 2.5 in my L.

A DOHC ECU couldn't run my SOHC engine, could it?
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Old 05-17-2009, 03:16 PM   #5
Zefy
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yes it can work.
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Old 05-27-2009, 03:10 PM   #6
ciper
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The important thing is the number of timing marks on the cams and crank NOT the overall number of cams. I am going to run a phase 2 ej25 shortblock with DOHC heads on a 93 sohc ej22 ECU!
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Old 05-27-2009, 10:40 PM   #7
bsikora
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yes it can work......
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Old 05-28-2009, 11:34 AM   #8
Qman
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Quote:
Originally Posted by Aegean93L View Post
I just swapped my 93 L with a 99 RS engine.
For now it's running great off the 1.8 ECU but I'm thinking I could get more out of it with a proper ECU.

Does anyone know if a SOHC N/A 2.5L OBD1 engine was ever offered in the JDM or any other markets?
I know it was offered in DOHC form but that is useless to me.

Cheers!
The '98 Impreza ECU is the only one the will plug and play. You will have to run a knock sensor and the wiring as it will not be present on you car.
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Old 05-28-2009, 12:04 PM   #9
Aegean93L
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Yeah, I guess I had a sort of brain fart when I started this thread. People run DOHC 2.5s on 1.8 ECUs all the time. Duh!

Qman - 98 is OBD2. It may physically be PnP but I think I would get a ton of CELs since my 93 L doesn't have half the sensors found on a 98 RS.
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