FAQ: JDM EJ20 swap. the easiest way IMO. - Page 4

WelDun1 · 03-23-2011, 08:20 PM

What would you rather have..the ej20g or the ej20k?

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kheff46 · 03-25-2011, 04:17 PM

G/ end thread

wrx surfwagon · 03-31-2011, 01:29 AM

i was so stoked about finding the 20g's for so cheap, but after reading this looks like im back to square one... thanks for this thread tho, saved me a bunch of time figuring out that its not worth it to swap into an 02 wrx

kheff46 · 04-01-2011, 03:40 PM

nothing but a 205/207/255/257 should go into a WRX.

2slofouru · 04-01-2011, 09:19 PM

yep, you could use a horse to pull your car but why?

IM101 · 04-08-2011, 05:44 PM

wow great information, ive been toying with the idea of a jdm swap into a porsche 914, im smog exempt so i dont necessarily care about the obd2. I was also thinking about having Outfront Motorsports do the wiring for me but this thread has got me thinking i may try it myself.

chemguy · 06-06-2011, 11:07 PM

This is my first time around with a subaru so thanks in advance. I have a JDM ej20GV (it came out of an impreza). that I want to put in a 95 legacy. Problem is the engine was hooked to an auto transmission and the legacy is auto. I have a convertor plate from an 06 USDM WRX engine (which is probaly different), but don't know where to get one for the JDM engine or if I'll need any other mods. Any advice would be appreciated.

peanutswagon · 06-07-2011, 06:45 AM

I am doing a JDM ej20h swap with JDM sti trans into a usdm forester. The guy that's doing it for me will know exactly the answer to that question as he only deals in JDM

davisclan · 06-23-2012, 12:26 AM

Quote:

Originally Posted by 69subaru360

There's some mistakes in the beginning of this thread, but whatever it's old. People have figured out a lot in 5 years.

My 95 wrx ej20g swap, engine, trans, harness and ecu, rear diff and lots of extras was $700. 95 fwd coupe rust free from florida was $600. I bought a dp, header, fmic and exhaust for it from ebay. I had most of the awd stuff sitting around, I need a few junkyard parts. Add in shipping and all the stuff I bought and I think I will have about $3500 in the car. I got rid of a lot of unneeded stuff, I think the car will be 2500 lbs or less. Once it's running I think I am going to add sti 550 cc injectors and a Rob chip. 300 whp and 2500 lbs will be fun.

I finished the wiring merge yesterday, it really wasn't a big deal. Strip down both harnesses and merge about 20 wires or so. It took me a few hours.

Would you buy a 04 WRX and do the 95 clip treatment (wiring?)
Sean

69subaru360 · 06-23-2012, 03:06 AM

Quote:

Originally Posted by davisclan

Would you buy a 04 WRX and do the 95 clip treatment (wiring?)
Sean

No. That makes no sense at all. Why would you put an old jdm engine in a newer wrx?

davisclan · 10-14-2012, 04:19 PM

What about putting an older Japenese motor in my newer car (i.e. 94-96 EJ20g into my 99 RS). Sure, why not? JDM motors only have at most 60,000 miles - it plugs in and works just fine.

I didn't explain properly. I want to do the full front clip, but in the meantime the 04WRX is dead. Will the 96-98 JDM just plug in? No ECU problems??

Sean

Smoke · 10-15-2012, 01:34 PM

I have nothing to add here.

Just to say my V4 EJ20K is running great!

Zephyr · 10-15-2012, 01:58 PM

Quote:

Originally Posted by davisclan

What about putting an older Japenese motor in my newer car (i.e. 94-96 EJ20g into my 99 RS). Sure, why not? JDM motors only have at most 60,000 miles - it plugs in and works just fine.

I didn't explain properly. I want to do the full front clip, but in the meantime the 04WRX is dead. Will the 96-98 JDM just plug in? No ECU problems??

Sean

The issue you are going to run into with putting an older JDM engine into a 96+ USDM car is that if your state has emissions requirements that utilize the OBDII port YOU WILL NOT PASS! The next issue is the wiring harness, you will need to merge the JDM harness into your RS harness or pay someone to merge it for you. You will need to use the JDM ECU. In your case you are better off putting a 02+ USDM engine in the car.

Z

06-06-2011, 11:07 PM	#82
chemguy Scooby Newbie Member#: 284967 Join Date: Jun 2011	ej20g swap This is my first time around with a subaru so thanks in advance. I have a JDM ej20GV (it came out of an impreza). that I want to put in a 95 legacy. Problem is the engine was hooked to an auto transmission and the legacy is auto. I have a convertor plate from an 06 USDM WRX engine (which is probaly different), but don't know where to get one for the JDM engine or if I'll need any other mods. Any advice would be appreciated.

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03-23-2011, 08:20 PM	#76
WelDun1 Scooby Newbie Member#: 249130 Join Date: Jun 2010 Chapter/Region: NWIC Location: North East Portland Vehicle: 0095 Ver5 STi Type R Black	What would you rather have..the ej20g or the ej20k? * Registered users of the site do not see these ads.

03-25-2011, 04:17 PM	#77
kheff46 Scooby Specialist Member#: 66739 Join Date: Jul 2004 Chapter/Region: MWSOC Location: Medina, Ohio Vehicle: 2002 WRX wagon silver	G/ end thread

03-31-2011, 01:29 AM	#78
wrx surfwagon Scooby Specialist Member#: 262719 Join Date: Nov 2010 Chapter/Region: NESIC Location: Connecticut Vehicle: 02 WRX PSM with rust accents	i was so stoked about finding the 20g's for so cheap, but after reading this looks like im back to square one... thanks for this thread tho, saved me a bunch of time figuring out that its not worth it to swap into an 02 wrx

04-01-2011, 03:40 PM	#79
kheff46 Scooby Specialist Member#: 66739 Join Date: Jul 2004 Chapter/Region: MWSOC Location: Medina, Ohio Vehicle: 2002 WRX wagon silver	nothing but a 205/207/255/257 should go into a WRX.

04-01-2011, 09:19 PM	#80
2slofouru NASIOC Supporter Member#: 90539 Join Date: Jul 2005 Chapter/Region: South East Location: somewhere east of CA Vehicle: 95 L with ej20k powa, Raven R6	yep, you could use a horse to pull your car but why?

04-08-2011, 05:44 PM	#81
IM101 Scooby Newbie Member#: 278477 Join Date: Mar 2011 Chapter/Region: NWIC Location: pdx ish Vehicle: 1973 914/legacy wag primer grey/silver	wow great information, ive been toying with the idea of a jdm swap into a porsche 914, im smog exempt so i dont necessarily care about the obd2. I was also thinking about having Outfront Motorsports do the wiring for me but this thread has got me thinking i may try it myself.

06-07-2011, 06:45 AM	#83
peanutswagon Scooby Newbie Member#: 197057 Join Date: Dec 2008 Chapter/Region: MAIC Location: Collegeville, Pa Vehicle: 1997 98 Foz V3 swap Black	I am doing a JDM ej20h swap with JDM sti trans into a usdm forester. The guy that's doing it for me will know exactly the answer to that question as he only deals in JDM

10-14-2012, 04:19 PM	#86
davisclan Scooby Newbie Member#: 283881 Join Date: May 2011 Location: Charlotte, NC Vehicle: 2004 WRX wagon 2.0 Silver	What about putting an older Japenese motor in my newer car (i.e. 94-96 EJ20g into my 99 RS). Sure, why not? JDM motors only have at most 60,000 miles - it plugs in and works just fine. I didn't explain properly. I want to do the full front clip, but in the meantime the 04WRX is dead. Will the 96-98 JDM just plug in? No ECU problems?? Sean

10-15-2012, 01:34 PM	#87
Smoke Scooby Guru Member#: 172486 Join Date: Feb 2008 Chapter/Region: NWIC Location: Cheney, WA Vehicle: 95 V4 STi-RA swap Stage 49.8	I have nothing to add here. Just to say my V4 EJ20K is running great!