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Old 07-24-2013, 04:55 PM   #1
DrCataract
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Join Date: Oct 2012
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2002 WRX STi
WRB

Default ej22t into sti swapped wagon.. need help

So I bought an 02 wagon with full sti hybrid swap. Engine had spun bearing. Pulled it out and found that I could rebuild engine. But heads didn't have combustion chambers bored to match the 2.5 block. Long story short, I've decided to do the engine right wich is taking forever. So since I need a running car I've decided to pull my longblock out of my 93 legacy ss. From research I've done if I swap the sti manifold to the ej22t then there's not much wiring changes to worry about. Is this true? What else will I need to make this work? This is only a temporary solution until my hybrid engine is finished. Thanks for the input.
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Old 07-24-2013, 08:14 PM   #2
69subaru360
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1998 2.5 RS

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It won't work. The STI intake manifold will not bolt to EJ22T heads.
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Old 07-25-2013, 02:57 AM   #3
DrCataract
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So would I b better off running the legacy ecu? What am I going to need to make this work? Been doing searches, just not getting the answers I need. Thanks for the input. Every bit helps and you guys have been lifesavers so far.
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Old 07-25-2013, 09:13 AM   #4
69subaru360
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It's not going to work. They are totally different engines. All the wiring is completely different.
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Old 07-27-2013, 05:45 PM   #5
DrCataract
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I'm confused. What happen to "think lego's"? And any ej series will swap to other ej series? Isn't this just a matter of making the swap from obdII TO OBD1? I mean I'm no master mechanic or electrician, but there is talk of guys running 02+ wrx ecu on their ej22t. And isn't there guys on here running ej22t hybrid engines in their newer wrx and imprezas? I guess I could b wrong, just doesnt make sense to me based on the information I have been able to find.
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Old 07-27-2013, 05:54 PM   #6
69subaru360
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Use the search, this has been discussed over and over.

You can use the shortblock, be sure to switch the crank gear it's different.

You can't use the heads, they are phase 1, the cam gear trigger pattern for the sensors is different and the gears do not interchange.

All the sensors wiring and everything on the intake manifold is totally different.

Just put the idea out of your head it doesn't work.
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Old 07-28-2013, 01:30 PM   #7
Adema2626
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Quote:
Originally Posted by DrCataract View Post
I'm confused. What happen to "think lego's"? And any ej series will swap to other ej series? Isn't this just a matter of making the swap from obdII TO OBD1? I mean I'm no master mechanic or electrician, but there is talk of guys running 02+ wrx ecu on their ej22t. And isn't there guys on here running ej22t hybrid engines in their newer wrx and imprezas? I guess I could b wrong, just doesnt make sense to me based on the information I have been able to find.
You have a lot to learn. These cars are like Lego's sometimes but they aren't that simple. You don't want to go from ob2 to ob1.

Yes there are guys that do run ej22t in their cars, but you should read on that more.

What heads are you running? Because you possibly can swap heads and intake manifold on to the ej22t block, but your gonna need a retune after doing that.

Just my 2 cents, but if your coming in here think theses cars are plug and play and everything fits perfectly and will work you are very wrong and should do a lot more searching before attempting this swap.
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Old 08-10-2013, 11:44 AM   #8
WRX34
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I had tossed an ej22t block into my 02 WRX a long time ago. Shortblock that is. Plug and play isn't hard when you talk heads to blocks, keeping in mind compression ratios and doing your research. I also ran a link ecu though. (Changed over to stock ecu and flashed at some point, but that was also a lot of tuning/timing to play with) Plenty of people told me it couldn't be done blah blah but it worked. And worked well. Had a lower CR but it allowed room for more boost.

The problem is like a few people have said, manifolds aren't universal to swap. And the sensors to run one vs the other may also be incompatible as they've upgraded to better ones over the years. It takes a lot of time in research and patience when something won't work or doesn't want to. I researched for MONTHS and compiled data like a mad scientist wit no life it seems now lol. Stick to full swaps unless you have the urge and will to get crazy.
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