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Old 01-10-2012, 06:13 PM   #1
ukranianization
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Default 05 legacy GT STI swap

My brother got a legacy gt with a bad engine,turbo and everything and was thinking about an STI swap. Is there a thread on this? Do you need a lot of wiring work and etc. Done?
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Old 01-11-2012, 03:19 PM   #2
typrice
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This is interesting, I would love to know the answer.
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Old 01-11-2012, 03:57 PM   #3
elromero3
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Check out PHAT subi's project. Its coming along looking sweet
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Old 01-11-2012, 08:25 PM   #4
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Is the Legacy GT auto or manual? I'm pretty sure PHATSuby went from an auto to a manual though, so that would eliminate a lot of the work and wiring harness splicing. Also, Ben is using a BE/BH Legacy, not the 4th gen Legacy (2005). I really don't think it would be that much depending on the donor car that you're harvesting from. But it's not as simple as dropping in a new motor.
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Old 01-11-2012, 09:40 PM   #5
Azlegacy
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After reading above it doesnt make sense. 2005 and up are turbo'd. There is no engine splicing. Swap to an STi block , fuel injectors , and turbo or rebuild current turbo. Get a tuner and good to go . As far as I know.
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Old 01-12-2012, 04:42 AM   #6
kirbykirb
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it's direct swap....
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Old 01-12-2012, 10:07 AM   #7
Frogsthatmoo
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Outback STI

For reference. Same body (just an Outback). Gregnauman can probably answer any questions you want.
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Old 01-12-2012, 12:44 PM   #8
netsfan549
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I have a 2.5 na engine. Can I put a gt engine in it?
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Old 01-12-2012, 08:35 PM   #9
Azlegacy
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^ If u want to spend thousands of dollars u can.
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Old 01-18-2012, 04:36 PM   #10
G3nX09
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Why would you wast your time doing that when the it basically a STI engine replaced the stock engine and buy a STI turbo and injectors with the STI intake manifold and tune it. Same stuff just some minor difference.
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Old 01-20-2012, 09:37 PM   #11
Azlegacy
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The sti 2.5 bottom end is what u want. It won't break like the legacy 2.5 turbo block.
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Old 01-28-2013, 06:39 PM   #12
deoexmacchina
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I would like to know also...

Cant find PHAT subi....

I dont want to pay STI insurance.
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Old 01-28-2013, 09:17 PM   #13
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My sister has done the swap 05 lgt 5eat with 04 sti motor. You have to extend a few wires but other wise it runs fine. Running on stock lgt ecu
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Old 01-29-2013, 03:20 PM   #14
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PHATsubi's crazy project -
HTML Code:
http://forums.nasioc.com/forums/showthread.php?t=2198454
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Old 01-31-2013, 05:22 PM   #15
rougeben83
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first off phatsuby has a 3rd gen car 00-04. You're talking about an 05 LGT, which is already turbocharged to begin with. Why do you want to do an STI motor and what are you goals?
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Old 01-31-2013, 05:26 PM   #16
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The 05 and 06 legacy gt short block is the same as an Sti SB. The heads are the big difference between the legacy and the Sti. The are a bunch of threads on legacygt.com about doing a Sti manifold and intercooler swap. Kind of a waste now that they make aftermarket turbos and TMICs for the legacy.
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Old 02-05-2013, 07:24 PM   #17
Reaper13
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What about 05 legacy 2.5 i. I'm interested in doing an sti swap what year would be best to swap with?
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Old 02-09-2013, 11:29 AM   #18
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Same here^^^
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Old 02-11-2013, 01:19 AM   #19
ArtClassShank
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Quote:
Originally Posted by Reaper13 View Post
What about 05 legacy 2.5 i. I'm interested in doing an sti swap what year would be best to swap with?
Sell your car and buy a Legacy GT.
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Old 02-12-2013, 05:58 PM   #20
benena
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Quote:
Originally Posted by verendia View Post
My sister has done the swap 05 lgt 5eat with 04 sti motor. You have to extend a few wires but other wise it runs fine. Running on stock lgt ecu
that is so dope.
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Old 02-16-2013, 10:36 AM   #21
MichaelBrown
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A friend of mine did something similar to this. He bought a 2002 Impreza RS really cheap, bought a wrecked 05+ STI for cheap. Combined them, and he had a 2002 STi for half the price of a 05+ STI.
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Old 02-16-2013, 12:53 PM   #22
kirbykirb
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Quote:
Originally Posted by MichaelBrown View Post
A friend of mine did something similar to this. He bought a 2002 Impreza RS really cheap, bought a wrecked 05+ STI for cheap. Combined them, and he had a 2002 STi for half the price of a 05+ STI.
Great idea, but make sure he does suspension upgrades, steeringn rack, etc
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Old 03-13-2013, 02:27 AM   #23
Sneeky Pete
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Quote:
Originally Posted by holyjoetart View Post
The 05 and 06 legacy gt short block is the same as an Sti SB. The heads are the big difference between the legacy and the Sti.
Heads,cams, valves, valve covers, plugs, wires, coils, oilpan,oil pump, waterpump, timingbelt, timing belt covers,exaust mainifolds, mid-pipe, up pipe, alternator, p/s pump,water neck, thermosatst and if I'm not mistaken the injectors are yellowtop side feed sti injectors... all these are the same as the Sti down to the tensioners.
(Same part numbers)

The diffrences that I have gathered are, diffrent up pipe, turbo, wastegate, intercooler,intake manifold, the airfilter intake, maybe the tgv's(but I don't think so) throttle body and some cooling and vacum line routeing under the intake, but the wiring harness on your lgt/obxt should be the same.

The fuel rail might be a little diffirent, I do recall reading something about that, but I'm not positive. I tore down my obxt engine today, its all pretty fresh in my head.

The intake on the lgt/obxt it plastic, logicly this means it will retain less heat, and since its moldedplastic my bet is it thinner and capable of flowing better than a sti intake. The Sti intercooler won't fit under the hood of a lgt/obxt with out modifing you scoop. All and all unless you just want to pop your hood and see Sti on your intercooler and a red intake, its really not worth all the work. With a d/p, turbo, intercooler and a tune you would be 300ish hp just as easyy as the "Sti engine"

Last edited by Sneeky Pete; 03-13-2013 at 02:40 AM.
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Old 03-17-2013, 01:05 PM   #24
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Actually the 255 and 257 are not that similar. The only thing that is the same is the block itself. ervything is pretty much different. Different heads and internals. Sti top mount does fit under a LGT hood. You need to swap everything over to make it work . Its more work than just swapping out the TMIC but it does fit with no modification to the actual hood
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Old 03-20-2013, 09:00 PM   #25
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Quote:
Originally Posted by PMDSOA View Post
Actually the 255 and 257 are not that similar. The only thing that is the same is the block itself. ervything is pretty much different. Different heads and internals. Sti top mount does fit under a LGT hood. You need to swap everything over to make it work . Its more work than just swapping out the TMIC but it does fit with no modification to the actual hood
While I could be wrong about a few things in the heads...like cams degree and maybe I'm wrong about the harness, but I promise with out a doubt that shortblock in this leg gt and outback xt are identical. I'm holding a new rotating assembly out of a sti short block and my rotating assembly out of my xt and every thing is identical...piston sizes, journal sizes, numbers on pistons rods and crank all match.
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