STi Engine Swap into early year Impreza

silex · 05-24-2005, 02:13 AM

I geard Garage Tuning can do this swap, but I guess the main reason I'm posting this is that I'm very new to Subi's and their engines. I am definetely aiming for an engine swapped car for my summer project and I am either highly considering a Nissan 240SX hatch with a 1JZ from a MK3 Supra or an early year Subi with STi engine. Guess I'm wondering about what my STi engine swap options are. I hear of this Type 1,2,3 and what not...jdm versus usdm...not really sure what to go with. I plan to make some high power and make the car a dedicated track car worthy of such.

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saar · 05-24-2005, 02:22 AM

If it's a STi Engine into a GC body your looking at ...it's not a totally uncommon swap... The differnt versions of engines most commonly swapped in are Ver.6, Ver.7 and the pin-ultimate swap the USDM 2.5L STi motor ... You may want to read around the 'Subaru Converison' Forum a bit ... To get a better idea of the steps involved in the swap.

silex · 05-24-2005, 03:10 AM

When you GC body I'm assuming the '95+ coupe? Can you explain the differences between the different engine types?

inchoate · 05-24-2005, 09:00 AM

there's very little exterior difference between subaru engines. they are for the most part interchangeable. if you do a search you should be able to find out about the different types. just to start you out, the ej-20 is the 2 liter, ej-25 is the 2.5, and ej-257 is the usdm 2.5 motor.

mbiker97 · 05-24-2005, 10:07 AM

Quote:

Originally Posted by silex

I hear of this Type 1,2,3 and what not...jdm versus usdm...not really sure what to go with. I plan to make some high power and make the car a dedicated track car worthy of such.

The types are different versions. v1 thru v9. I would buy a JDM v7 or v8 to swap into a GC. They make a lot of power and have the ability to hold more power too.

More impreza version info: http://www.northursalia.com/t...y/history.html

Homerisking · 05-24-2005, 01:11 PM

Not an sti but still drool worthy.....one of the nicest gc8 I've ever seen. Its a wrx motor with a v8 intake manifold. Check out the link.

http://forums.nasioc.com/forums/show...hlight=gc8+sti

silex · 05-24-2005, 03:20 PM

Thanks for the reply guys. The 'Conversion' forums and the associated FAQ's answered a majority of my questions

. I guess what I'm wondering is the potenntial of the EJ20 versus the STi's EJ25. I also hear the longblock on the JDM engines are built to withstand more torture than a comparible USDM so in the long run, it might be worth it more to sacrafice the 30HP with the JDM STi to save a bit of money. Any truth to any of this?

JDM_Scobaru · 05-24-2005, 03:27 PM

Quote:

Originally Posted by silex

I geard Garage Tuning can do this swap, but I guess the main reason I'm posting this is that I'm very new to Subi's and their engines. I am definetely aiming for an engine swapped car for my summer project and I am either highly considering a Nissan 240SX hatch with a 1JZ from a MK3 Supra or an early year Subi with STi engine. Guess I'm wondering about what my STi engine swap options are. I hear of this Type 1,2,3 and what not...jdm versus usdm...not really sure what to go with. I plan to make some high power and make the car a dedicated track car worthy of such.

Good luck trying to wire a 96+ motor into a pre95 car! You would have to convert from obd1-2. Stick to a swap that is closest to your year so wiring wont be as bad.

silex · 05-25-2005, 02:03 AM

That's true, but if you're going to go the JDM route, they don't use an EGR system so it makes it much easier to install. One less thing to put in. Just have to smog it under the table.

Uncle Scotty · 05-25-2005, 07:03 AM

Quote:

Originally Posted by silex

That's true, but if you're going to go the JDM route, they don't use an EGR system so it makes it much easier to install. One less thing to put in. Just have to smog it under the table.

....EGR isn't an issue....it is all the wiring needed to the harnesses to make it all work properly....there are pics of spaghetti

around......and like posted above.....an 95+ with a 95+ motor is easiest.....

silex · 05-25-2005, 05:10 PM

Okay I get it. The previous guy made it seem that the problem was in the differences between OBD systems.

cRayZee · 05-25-2005, 05:38 PM

garage tuning did my swap. 2004 2.5 USDM STi in a 2001 2.5 RS

I'm very happy with it

05-24-2005, 02:13 AM	#1
silex Scooby Newbie Member#: 87706 Join Date: May 2005	STi Engine Swap into early year Impreza I geard Garage Tuning can do this swap, but I guess the main reason I'm posting this is that I'm very new to Subi's and their engines. I am definetely aiming for an engine swapped car for my summer project and I am either highly considering a Nissan 240SX hatch with a 1JZ from a MK3 Supra or an early year Subi with STi engine. Guess I'm wondering about what my STi engine swap options are. I hear of this Type 1,2,3 and what not...jdm versus usdm...not really sure what to go with. I plan to make some high power and make the car a dedicated track car worthy of such. * Registered users of the site do not see these ads.

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05-24-2005, 02:22 AM	#2
saar Scooby Specialist Member#: 43770 Join Date: Sep 2003 Location: Edmonton, AB Vehicle: 2013 Impreza WRX Lim 2001 Impreza WRX STi	If it's a STi Engine into a GC body your looking at ...it's not a totally uncommon swap... The differnt versions of engines most commonly swapped in are Ver.6, Ver.7 and the pin-ultimate swap the USDM 2.5L STi motor ... You may want to read around the 'Subaru Converison' Forum a bit ... To get a better idea of the steps involved in the swap.

05-24-2005, 03:10 AM	#3
silex Scooby Newbie Member#: 87706 Join Date: May 2005	When you GC body I'm assuming the '95+ coupe? Can you explain the differences between the different engine types?

05-24-2005, 09:00 AM	#4
inchoate Scooby Specialist Member#: 5470 Join Date: Apr 2001 Chapter/Region: Tri-State Location: Philadelphiaish Vehicle: 2014 Honda Odyssey Nondescript	there's very little exterior difference between subaru engines. they are for the most part interchangeable. if you do a search you should be able to find out about the different types. just to start you out, the ej-20 is the 2 liter, ej-25 is the 2.5, and ej-257 is the usdm 2.5 motor.

05-24-2005, 01:11 PM	#6
Homerisking Scooby Specialist Member#: 79164 Join Date: Jan 2005 Chapter/Region: NWIC Location: SCIC dropout Vehicle: 2005 WRX tHe Silver one	Not an sti but still drool worthy.....one of the nicest gc8 I've ever seen. Its a wrx motor with a v8 intake manifold. Check out the link. http://forums.nasioc.com/forums/show...hlight=gc8+sti

05-24-2005, 03:20 PM	#7
silex Scooby Newbie Member#: 87706 Join Date: May 2005	Thanks for the reply guys. The 'Conversion' forums and the associated FAQ's answered a majority of my questions . I guess what I'm wondering is the potenntial of the EJ20 versus the STi's EJ25. I also hear the longblock on the JDM engines are built to withstand more torture than a comparible USDM so in the long run, it might be worth it more to sacrafice the 30HP with the JDM STi to save a bit of money. Any truth to any of this?

05-25-2005, 02:03 AM	#9
silex Scooby Newbie Member#: 87706 Join Date: May 2005	That's true, but if you're going to go the JDM route, they don't use an EGR system so it makes it much easier to install. One less thing to put in. Just have to smog it under the table.

05-25-2005, 05:10 PM	#11
silex Scooby Newbie Member#: 87706 Join Date: May 2005	Okay I get it. The previous guy made it seem that the problem was in the differences between OBD systems.

05-25-2005, 05:38 PM	#12
cRayZee Scooby Specialist Member#: 6271 Join Date: May 2001 Location: San Jose Vehicle: 2001 2.5RSTi 2007 Legacy Spec B	garage tuning did my swap. 2004 2.5 USDM STi in a 2001 2.5 RS I'm very happy with it