ej20g motor with USDM WRX transmission??

1hotsubaru · 11-22-2011, 11:43 PM

Hey guys, got a quick question. I know that I can fit the older EJ20G motor into my transmission, but what would I need to make it work properly?? Since I will be using my transmission, I wouldn't need a new clutch assembly, rear differential, master slave cylinder, etc. right? Glad if someone could give me some insight.

* Registered users of the site do not see these ads.

DHRDAN · 11-23-2011, 01:16 AM

....sigh... tranny always follows the rear.

If you're just changing the engine.... the rest will fit.

Subaru didn't change clutch types till the v8. ... so you're fine.

1hotsubaru · 11-23-2011, 08:34 AM

Really? That's probably the route I'll go then. I know some people say that the long block won't fit because the 02 wrx intake manifold doesnt work with the ej20g, but that's why I just want to get a motor with the wiring harness. Anyone else got some insight?

RallyColtTurbo · 11-23-2011, 12:12 PM

There will be a missing bolt hole on the motor for the second starter bolt.

Early tranmissions had stud on the trans and no hole on the motor.

Later transmissions used a long bolt through the bellhousing and a matching threaded hole on the block. So some fabrication will be involved....a search should turn up what others have done.

Not quite sure of your plan, but USDM WRX wiring and ECU will not control an early EJ20G. You should be able swap the cylinder heads and intake manifold and the crank sensor to the older motor. Basically just use the shortblock, but double check compression ratios and head gasket thickness to be sure.

Jaxx · 11-24-2011, 04:13 PM

you do know that a 02 ecu will NOT run an ej20G right?

1hotsubaru · 11-28-2011, 10:17 AM

Quote:

Originally Posted by RallyColtTurbo

There will be a missing bolt hole on the motor for the second starter bolt.

Early tranmissions had stud on the trans and no hole on the motor.

Later transmissions used a long bolt through the bellhousing and a matching threaded hole on the block. So some fabrication will be involved....a search should turn up what others have done.

Not quite sure of your plan, but USDM WRX wiring and ECU will not control an early EJ20G. You should be able swap the cylinder heads and intake manifold and the crank sensor to the older motor. Basically just use the shortblock, but double check compression ratios and head gasket thickness to be sure.

Ok, that blows... I won't be able to fabricate anything for now, so I won't be able to go that route. I do like the idea of just using the ej20g block, but we'll see. Thanks!

Quote:

Originally Posted by Jaxx

you do know that a 02 ecu will NOT run an ej20G right?

Yes I'm aware of this. The engine I was looking at did come with an ECU. I think I'm just going to stay USDM for now.

11-22-2011, 11:43 PM	#1
1hotsubaru Scooby Specialist Member#: 244748 Join Date: Apr 2010 Chapter/Region: MAIC Location: Harrisonburg, VA Vehicle: 2002 WRB Impreza WRX 2.1 Stroker w/ VF39	ej20g motor with USDM WRX transmission?? Hey guys, got a quick question. I know that I can fit the older EJ20G motor into my transmission, but what would I need to make it work properly?? Since I will be using my transmission, I wouldn't need a new clutch assembly, rear differential, master slave cylinder, etc. right? Glad if someone could give me some insight. * Registered users of the site do not see these ads.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
3500rpm cut out - EJ20G with USDM WRX Ignition Coils	BoostAddictPL	Pre-2002 Factory Turbo Powertrain	17	11-24-2010 03:18 PM
FS: USDM WRX Transmission	LegendaryHarry	Private 'For Sale' Classifieds	43	07-17-2006 09:41 PM
Feeler- EJ20G motor with complete harness	imprezdgc8	MAIC Private Classifieds	10	04-19-2006 11:42 PM
WRX with STi side splitter or STi with USDM WRX fogs	subUrbanAuthority	Member's Car Gallery	13	02-19-2005 02:53 AM
Can I run V7 motor with USDM WRX ecu?	PRODRIVEN	Subaru Conversions	30	11-14-2004 03:33 PM

11-23-2011, 01:16 AM	#2
DHRDAN Scooby Specialist Member#: 204358 Join Date: Feb 2009 Chapter/Region: SCIC Location: Santa Paula, CA. Vehicle: 01 2.5RS W/ EJ257 Black	....sigh... tranny always follows the rear. If you're just changing the engine.... the rest will fit. Subaru didn't change clutch types till the v8. ... so you're fine.

11-23-2011, 08:34 AM	#3
1hotsubaru Scooby Specialist Member#: 244748 Join Date: Apr 2010 Chapter/Region: MAIC Location: Harrisonburg, VA Vehicle: 2002 WRB Impreza WRX 2.1 Stroker w/ VF39	Really? That's probably the route I'll go then. I know some people say that the long block won't fit because the 02 wrx intake manifold doesnt work with the ej20g, but that's why I just want to get a motor with the wiring harness. Anyone else got some insight?

11-23-2011, 12:12 PM	#4
RallyColtTurbo Scooby Specialist Member#: 16819 Join Date: Mar 2002 Chapter/Region: SCIC Location: Lake Elsinore, CA Vehicle: 2002 MBP WRX, '98 OB Three Gen 1 Legacy Turbos	There will be a missing bolt hole on the motor for the second starter bolt. Early tranmissions had stud on the trans and no hole on the motor. Later transmissions used a long bolt through the bellhousing and a matching threaded hole on the block. So some fabrication will be involved....a search should turn up what others have done. Not quite sure of your plan, but USDM WRX wiring and ECU will not control an early EJ20G. You should be able swap the cylinder heads and intake manifold and the crank sensor to the older motor. Basically just use the shortblock, but double check compression ratios and head gasket thickness to be sure.

11-24-2011, 04:13 PM	#5
Jaxx NASIOC Supporter Member#: 177 Join Date: Aug 1999 Chapter/Region: NWIC Location: Boise,Idaho,USA Vehicle: The 93 Imp W/EJ20K flat black	you do know that a 02 ecu will NOT run an ej20G right?