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Old 12-17-2005, 01:07 PM   #1
xeros
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Lightbulb Ej20 swap into a outback sedan

Alright my friend has a automatic 2.5l sedan outback limited. His engine is at a 100,000 miles. I've searched around this forum and it doesn't seem liek anyone has done this or at least I didnt search properly. Either way I just want to know whats needed, I want help compiling a check list of what I will need to make something like this happen.


Engine (long block everythig already on it)
Engine harness
Engine mounts
Tranny
Tranny harness
Tranny mounts
Stock ECU...(maybe a tuneable Apex'i?)
Clutch master cyliner and all the other gods for a manual swap

Would it be better to swap the rear with an STi LSD?
Should I just go with an entire drivetrain swap...actually would I have to fabricate a drive shaft long enough to reach back there?

Thanks for the help.
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Last edited by xeros; 12-17-2005 at 02:20 PM.
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Old 12-17-2005, 03:24 PM   #2
Jaxx
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you need the entire harness not just the engine harness
no a sti rear diff is a bad idea you need a wrx diff +axels (depending on year of outback)

a complete car reallly helps
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Old 12-17-2005, 04:43 PM   #3
xeros
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my bad its a 4 door 2001 sedan as it says up top.
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Old 12-17-2005, 04:44 PM   #4
xeros
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now when you say the entire harness.....you mean all the harnesses in the engine bay and under the dash?
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Old 12-17-2005, 07:03 PM   #5
Jaxx
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entie harness under the dash
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Old 12-17-2005, 10:31 PM   #6
xeros
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oye....the cluster as well I take it then?
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Old 12-18-2005, 11:34 AM   #7
kheff46
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why use an ej20 in a legacy? this chassis is capable of housing the H6 with little to no problems like an impreza might encounter(due to space alotted). turbo the H6 to 5 or 6psi and have fun with your torque(everyone else will be jealous)! -keith
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Old 12-19-2005, 10:10 PM   #8
silverstreakwrx
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yeah don't put the dumb ej20 in your outback...please
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Old 12-19-2005, 10:47 PM   #9
rsk135
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Why wouldn't you put an ej20 in an outback? The outback is just a legacy, In the rest of the world the legacy/liberty come with ej20, ej2tt, and ej20tt.

As for putting an H6 in, it'll fit just fine but it will most likely cost more as the parts are hard to sorce and its the same amount of work as the ej20 swap.
The dash in the H6 outback and ej25 outback have different clusters and hvac so you'll still have to either do the wiring or swap everything on both sides of the firewall.
There are others here who have done H6 swaps they can give you more insight but I bet they'd never do it again.

There is also very little H6 aftermarket support and adding forced induction would be even more expensive and reliability would be an issue. This is obviously not the case for the ej20.

Now someone will come back with the "there was a turbo h6 at sema" arguement. And while I applaud the company that did that build and the people who supported it I bet the final product is ridiculously expensive when it comes to market.
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Old 12-20-2005, 12:20 PM   #10
kheff46
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so there was this turbo H6 at sema... sorry! had to!
i just don't like the fact of a larger car with a small engine. there are 2.5 turbo's out there waiting for a good home too! torque from a 4 banger is hard to do why not take advantage of whats avail now? just thought i'd give other options that would help pull your car around better without havin to redline gear to gear to keep up with my imprezas. -keith
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Old 12-20-2005, 01:20 PM   #11
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Yeah, I know what you mean. When comparing numbers though:

EJ25 EJ20 H6-ez30
Horsepower 165 hp @ 5600 rpm 227 hp @ 6000 rpm 212 hp @ 6000 rpm

Torque 166 ft-lbs @ 4000 rpm 217 ft-lbs @ 4000 rpm 210 ft-lbs @ 4400 rpm

The ej20 is a signifiacnt improvment over the ej25. But the torque in the h6 is more linear.
In the end you can still buy an entire wrx drivetrain for what most yards want for just the H6 engine. I tried to source an H6 for my forester, thought it would be fun, turned out to be too expensive.
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Old 12-21-2005, 12:16 PM   #12
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the 2.5 turbo is a good choice, and requires less mods than H6. more like swapping an ej20 is. this would be my choice personally. -keith
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Old 12-21-2005, 02:03 PM   #13
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Quote:
Originally Posted by kheff46
the 2.5 turbo is a good choice, and requires less mods than H6. more like swapping an ej20 is. this would be my choice personally. -keith
its a bad choice due the the miserable reliability of a non-factory turbo 2.5 and the signifigant cost of a good turbo/em setup



need to slap some knoobs around here
ej20 into legacy (of any kind) = happy 100+ more hp than ej25 na
ez30 (not R), more work than ej20, less power than ej20
ez30R, lots and lots more work, less power than ej20
ez30R+ turbo, stupid expensive $20K+ lots of power read phatscoby's thread

no you don't need to use the cluster but the splicing is not trivial
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Old 12-21-2005, 02:16 PM   #14
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really thats exactly what i said although not as scattered brained
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Old 12-21-2005, 02:23 PM   #15
Jaxx
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yeah well yeah ..


cept make that figures
with the free ecu reading/editing/reflashing technology that is starting to show up there is no reason to call it 227 any more
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Old 12-21-2005, 02:30 PM   #16
kheff46
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Quote:
Originally Posted by Jaxx
its a bad choice due the the miserable reliability of a non-factory turbo 2.5 and the signifigant cost of a good turbo/em setup



need to slap some knoobs around here
ej20 into legacy (of any kind) = happy 100+ more hp than ej25 na
ez30 (not R), more work than ej20, less power than ej20
ez30R, lots and lots more work, less power than ej20
ez30R+ turbo, stupid expensive $20K+ lots of power read phatscoby's thread

no you don't need to use the cluster but the splicing is not trivial
jaxx- i was talking about the ej257, not that n/a crap! how dare you? kiddin! if you really want to slap someone around buy a hooker! -keith
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Old 05-09-2011, 11:07 PM   #17
mccueauto
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I am doing this swap as we speak. Here is what I have done. I built a harness from the engine bay harness to the engine harness so I can just plug it in to the factory harness. I then had to cut and solder all of the wires to the ecu from the factory harness. Here is the real bad points good luck finding a good ecu pin out for the jdm ecu. Everyone has one but none are right. Also you are going from a map car to a maf car so you have to wire that in once again good luck finding stock wiring schematics to show you the wire color plus the wires change color from the ecu to the engine harness. It is great fun! I have now spent about 20 hours on just wiring alone. The engine does fit but you have to cut the cross member on the passenger side to clear the exhaust. I have decided after all that wiring to use the link4 ecu so I can have some control over it. I would have used it sooner if i knew about it but it should be better than the stock ecu. Power steering lines will need to be moded as well plus a hood scoop for the intercooler. I had a welding shop mod a ebay one for me and custom made the mounts. I also had to fab a throttle cable mount as the jdm one was way short and the one that came off the 2.5 was at the wrong angle. I will post some pics when done but what a pain in the butt. Be ready to do some work. I am useing the factory trans which is an auto so I will see if I run any problems there. The stock ecu has four trans inputs and the jdm has one. I will know shortly..
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Old 05-12-2011, 06:00 PM   #18
kheff46
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Holy old thread bump!

--keith
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Old 05-12-2011, 08:01 PM   #19
ballitch
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There mccueauto goes, scaring all the potential H-6 swappers out of the interwebs. Seriously though, I would LOVE to have an H-6 under the hood. Don't worry little wrx, i'll wait for your turbo to spool, not.


~Josh~
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