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Old 09-27-2008, 01:46 AM   #1
sleepysubie
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Default 08 sti motor in 05 sti need help!

i just bought a wrecked sti and want to pu the motor in my 05 sti, but i'm not sure what i need to do. Do i just swap blocks and keep all my 05 stuff or can i get a wiring harness adapter? Anyhelp would be appreciated. thanks
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Old 09-27-2008, 09:21 AM   #2
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being that this venture hasn't been done before (to my knowledge) you probably wont find any help.

But to answer your question the best I can, swap blocks. The 08 has an airpump :/
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Old 09-27-2008, 09:28 AM   #3
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It also has dual AVCS - which is very interesting. The blocks themselves are the same - so no benefit from that, but you could use the better heads if you had the ecu, engine harness, and all that. I'm not sure about the sensors and if they're the same between the years - so you might be better off taking everything out of the 08 and installing it. While you're there - you can get the longer gears from the 08. Now that I'm thinking about it - it may just be easier to sell the 08 parts and buy some Cosworth/RAW/whoever heads.
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Old 09-27-2008, 09:49 AM   #4
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you are going to have to pull a lot out of the 08 such as the wiring harness, ecu etc...

also like sidewayz said, the 08 has that EPA recirc bull****... get rid of that and make sure that once the 08 is in the car, you get a tune
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Old 09-27-2008, 10:34 AM   #5
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If you want tod o the complete motor you will need to swap out the engine, ECU wire harness and probably even the gauge cluster. The harness is completely different from that of your 05. You can swap just the block, but there isn't really any point. If anything the 08's are not as strong as the 05's (block wise) as proven by the number of people having issues with the 08 engines.

Tony
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Old 09-27-2008, 11:01 AM   #6
All4bSpinnin
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ya so that being said... put the 08 heads on your 05 block and convert everything else into your o5
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Old 09-27-2008, 11:45 AM   #7
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Quote:
Originally Posted by All4bSpinnin View Post
put the 08 heads on your 05 block and convert everything else into your o5
+1
the harness is WAY to complex to merge and the 08 ecu is interconnected to too many things
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Old 09-27-2008, 01:07 PM   #8
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Jaxx-

Funny you mention that.. I was reading the wiring manual the other day because a customer "found" an 08 to swap in his GC... jesus h christ that system is NUTS
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Old 09-27-2008, 02:21 PM   #9
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oh yea, injectors are top feed on the 08, not side feed
need the 08 ecu also
wiring harness
and probably the gauge cluster
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Old 09-27-2008, 07:03 PM   #10
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i dont see how you'll be able to make good use of this unless you're ready to swap your wiring harness from headlight to taillight from one car to the other.
is there anything wrong with your 05? if not its really not going to be very beneficial to swap, and definitely not worth the time or money.

it would be very similar to what was required for my swap, which had us strip the entire car down to a bare shell and rebuild with all of the new wiring and parts. you'll need complete engine, engine harness, full chassis harness headlight to taillight, ecu, immobilizer, keyring and key, door locks, and a lot of other little bits and pieces.
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Old 09-27-2008, 07:42 PM   #11
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actually the 08 is far worse than the 07
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Old 09-28-2008, 01:30 AM   #12
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Jaxx is right Brian,

I've been studying the 08 diagrams for a while now.. and that ish just confuses me lol. Not only that... NONE of that wiring will just plug in and play like for your swap
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Old 09-28-2008, 01:54 AM   #13
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He did say he bought the STI wrecked correct?

If so, if he has EVERYTHING why not, With some motivation he can do it and shure it was like this for the first EVER sti swap, let him do it and we will help and lets see what happens.
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Old 09-28-2008, 11:14 AM   #14
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because its not a direct bolt in to the old shell
possible .. but very very advanced and difficult
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Old 09-28-2008, 02:52 PM   #15
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ya.... that would be a task I wouldnt even want to do.
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Old 09-28-2008, 04:04 PM   #16
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Ive posted this else where, but the speed signal comes from the wheel speed sensors on the 08 impreza just like the 05 and up legacy (same car).

Speed signal is shared on the can network via ABS/VDCM. You cant fake it, the wheel speed sensors are 2 wire hall effect sensor that use a magnetic encoder embeded in the wheel bearing vs the magnetic pick up type/tone wheel used in your 05.

IMO even attempting this type of swap is useless if the ECM doesnt get the speed signal the vehicle will be in limp mode it also has a true BIU like the legacy.
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Old 09-28-2008, 04:19 PM   #17
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Heres an idea.... take everything out of the '08 (which you are going o have to do anyway.) Then build a frame and mount verything to it. Make sure you lights and everything meet the state safety inspection requirements for height. Get it street legal as an assembled vehicle and have fun. I have done it, it will be easier than putting it all into your '05.

Here are some videos of the car I made, as well as some pics;
http://www.cardomain.com/ride/3088011
http://video.cardomain.com/armigerlives
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Old 09-28-2008, 11:49 PM   #18
All4bSpinnin
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why not bolt on the 08 heads and run a HYDRA... that controls dual AVCS
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Old 09-29-2008, 01:00 AM   #19
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ALso Is there anything wrong with your 05?

If not leave it at that, Or if you really want to do something do what teh above poster said, run the heads with mangment if that helps!
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Old 09-29-2008, 10:49 AM   #20
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hydra or link g4 would be the correct answer if you were to try this
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