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Old 05-12-2003, 11:19 PM   #1
Eureka
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Member#: 36488
Join Date: May 2003
Location: Live in Brisbane, Australia
Default JDM EJ20 DOHC boxer

Hello,
I have brought a Eureka project kit car (similar to a Sterling or Nova) which is fitted with an EJ20 n/a motor. Here is a picture
http://groups.msn.com/PurvisEureka/j...to&PhotoID=318

The name plate says:
SUBARU
4CAM 16VALVE
BOXER multipoint fuel injection

I've been told it is a Japanese import (JDM) and was not sold in Australia or the US.
1.) Can anyone please give me any technical specifications / wiring diagrams for this motor, or point me to where I might find them?
2.) As you can see, I have no wiring loom or ECU! Any suggestions in this area would also be appreciated.
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Old 05-13-2003, 07:04 PM   #2
Eureka
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Join Date: May 2003
Location: Live in Brisbane, Australia
Unhappy

Come on there must be at least ONE guru on this forum that can help me?
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Old 05-13-2003, 07:35 PM   #3
kidatari
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I'm not sure how much help we're going to be here, as I'm not sure if any cars came with the EJ20 N/A in the US. I'll do some looking for a wiring diagram, but sourcing an ECU/full wiring harness will be definately difficult.
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Old 05-14-2003, 09:13 AM   #4
Legacy777
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Location: Houston, Tx
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1990 Legacy & 97 OBS
AWD 6MT EJ22T AWIC Swap

Default

Grab the SAE tech article from my site http://www.surrealmirage.com/subaru/tech.html

It has info on the EJ20 n/a motors. It may be slightly dated.....you'd have to find out how old your motor is.
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Old 05-18-2003, 07:37 PM   #5
Eureka
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Thanks legacy777, That SAE paper was very informative. At least now I have some specs. 7500 RPM redline! It appears that the previous owner purchased the motor second hand in early 1997

kidatari, I'm planning on installing an aftermarket ECU and doing the wiring myself (I'm an electronics and electrical engineering associate). A wiring diagram would help me out here.
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Old 05-19-2003, 04:18 AM   #6
Kostamojen
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I have seen very few wiring diagrams on these boards, especially for a motor I dont think anyone has here in the states... Try one of the british or australia subaru clubs and see if they have one.
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Old 05-19-2003, 05:19 AM   #7
US2JDM
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Old 05-19-2003, 01:30 PM   #8
Puckaveli
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Eureka send me an e-mail to recieve your free gift. Throw your screen name in your subject so I know who you are.

jallen@alside.com
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Old 05-20-2003, 03:25 AM   #9
danci1973
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Quote:
Originally posted by legacy777
Grab the SAE tech article from my site http://www.surrealmirage.com/subaru/tech.html

It has info on the EJ20 n/a motors. It may be slightly dated.....you'd have to find out how old your motor is.
Is the date of that article really 1989!? Wow...

How to convert JDM power units (ps) to kW (kilowatt)? My EJ20NA is speced at 85kW, which is roughly 115HP. Why does JDM 150ps sound like a lot more!? Could the dual mode induction system be the main reason (I'm pretty sure my has a normal mode induction system)?

D.
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Old 05-20-2003, 09:36 AM   #10
Legacy777
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AWD 6MT EJ22T AWIC Swap

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Yeah,

that is dated back in 89. Came out with the introduction of the Legacy platform

1 ps is almost 1 hp

The actual conversion is

1 ps = 0.9863 hp

So that JDM EJ20 n/a has about 147-148 hp or around that.
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Old 05-21-2003, 03:22 AM   #11
danci1973
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Quote:
Originally posted by legacy777
Yeah,

that is dated back in 89. Came out with the introduction of the Legacy platform

1 ps is almost 1 hp

The actual conversion is

1 ps = 0.9863 hp

So that JDM EJ20 n/a has about 147-148 hp or around that.
My EURO spec EJ20 n/a has only 85 kW (~115 hp). Could the dual mode induction system provide that extra power? Or are there more differencies?

D.
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Old 05-21-2003, 09:17 AM   #12
Legacy777
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1990 Legacy & 97 OBS
AWD 6MT EJ22T AWIC Swap

Default

possibly the induction system differences.

Plus it can be in the tuning of the engine, compression ratio, & type of fuel they have too.

I don't know enough of the differences on the EJ20 to know exactly why, but some of the things I listed and what you listed are a good possibility why.
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Old 06-04-2003, 01:42 AM   #13
Eureka
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Hi all,
my engine wiring seems to match up with that in the workshop manual for pre MY97 models that I found here:

http://www.saxonfields.freeserve.co....oby%20Page.htm
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