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Old 11-04-2008, 05:32 PM   #1
VIsubi
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I've been hearing alot about swapping to an STI block or even an STI motor...EJ255 are hard to find for some reason and EJ257 are very easy to find..my question is will SOHC heads bolt up to an STI block. Or is it easier to just get the STI motor and use 2.5i/WRX tranny. Which got me thinking..anyone know of good places to buy a 06 WRX motor ECU and harness. or d oyou think its better to go with the AVO kit....either way I like the turbo it comes with and very intrested in swapping the turbo in to a wrx motor whe ndone. Anyone here got there 2.5i turbo'd
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Old 11-05-2008, 10:43 AM   #2
Boosted WRX STi
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Ohhhhhhhhhh boy.... here we go again. The heads will bolt up. The search button comes in handy, I asked the same question about two months ago. The amount of money and work your talking about, its really not worth the effort unless you know, or have some friends that know all the ins and outs of doing such a swap. If your set on it, then yes, get an STi motor and keep your tranny, as it will bolt up too. Go to y2kimports.com they specialize in selling complete motor kits.

My advice, do some suspension upgrades ( I put '06 STi springs in mine and it made a world of difference), and maybe an exhaust and intake.
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Old 11-05-2008, 11:24 AM   #3
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no intake because they are bad for 2.5i's, they **** with the MAF and etc go read williatys post in the NA section (sticky)
but like he said, suspension upgrades, springs, rsb, etc will make a huge difference, thats what i will work on. i got an sti catback fabricated to fit my car and it sounds nice and 1000x louder than stock
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Old 11-05-2008, 01:44 PM   #4
rdodger
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Unless you want to do hundreds of hours of research just buy a complete engine, ecu, and wiring then have a shop that specializes in swaps do it. Trust me I built my motor from the ground up and its an insane amount of work. I saved money but only because I have so much wrenching/fabbing experience and connections to cheap parts. If you were to include my labor as a cost its probably $4000 in labor alone.

edit: I see you're driving an 06 2.5i, you will most certainly save money by just selling it and buying a wrx and not have to deal with all the time money and issues.
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Old 11-05-2008, 01:56 PM   #5
VIsubi
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Quote:
Originally Posted by Boosted WRX STi View Post
Ohhhhhhhhhh boy.... here we go again. The heads will bolt up. The search button comes in handy, I asked the same question about two months ago. The amount of money and work your talking about, its really not worth the effort unless you know, or have some friends that know all the ins and outs of doing such a swap. If your set on it, then yes, get an STi motor and keep your tranny, as it will bolt up too. Go to y2kimports.com they specialize in selling complete motor kits.

My advice, do some suspension upgrades ( I put '06 STi springs in mine and it made a world of difference), and maybe an exhaust and intake.
yeah we are going you guys cussed at me posting in N/A now you gotta be a punk ass about it in this thread..dude get a life please for real....I know they will bolt up don't need your advice...second yes I can wrench and fabricate..just don't know much about the engines..and thats with about 2 years of research...so before I go a route I need to find out who else has done this..personally I'm not trading in my car cause its cheaper on insurance and I'll have a wrx or sti engine. perferably a wrx..I feel that the sti will damage the tranny in the future....especially second gear as has so many of my wrx friends have done. Thanks for the site will order my engine ecu and harness instead.....I'm use to SR20 swaps which I may say is alot easier with wiring than a subaru where everything is..electric...intake I have a cone filter removed my air box flows alot better and sounds better and I get no CEL so I'm sticking with it this way till swap...ohh yeah and a greddy exhaust. 3 inch outlet stock piping...sound really good actually to tell you the truth.
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Old 11-05-2008, 06:06 PM   #6
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Quote:
Originally Posted by VIsubi View Post
yeah we are going you guys cussed at me posting in N/A now you gotta be a punk ass about it in this thread..dude get a life please for real....


I know they will bolt up don't need your advice...
^^^ isn't this what you asked for in your original post??

I wasn't harping on you, I was saying that you are asking questions that have been asked before, and that your prolly going to take flack for it since its posted every other day on the forums by people who don't use the search method.
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Old 11-15-2008, 02:21 PM   #7
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Quote:
Originally Posted by VIsubi View Post
yeah we are going you guys cussed at me posting in N/A now you gotta be a punk ass about it in this thread..dude get a life please for real....I know they will bolt up don't need your advice...second yes I can wrench and fabricate..just don't know much about the engines..and thats with about 2 years of research...so before I go a route I need to find out who else has done this..personally I'm not trading in my car cause its cheaper on insurance and I'll have a wrx or sti engine. perferably a wrx..I feel that the sti will damage the tranny in the future....especially second gear as has so many of my wrx friends have done. Thanks for the site will order my engine ecu and harness instead.....I'm use to SR20 swaps which I may say is alot easier with wiring than a subaru where everything is..electric...intake I have a cone filter removed my air box flows alot better and sounds better and I get no CEL so I'm sticking with it this way till swap...ohh yeah and a greddy exhaust. 3 inch outlet stock piping...sound really good actually to tell you the truth.
woah ! you off your meds dude?
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Old 11-16-2008, 02:54 AM   #8
VIsubi
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I use the search method but when I do look it brings up some crap about women like it bigger to cleaning your car..so I'm assuming the search engine on here is pretty crappy ...hence having to get a direct answer....trust me I'd rather search it than ask. Cause that just means I have to wait a day or two to get a reply..rather than having the answer right thee at the same time. But i was looking into maybe 2.5iGt swap seeing as the new impreza not wrx do come with a turbo charged engine(damn you subby) finally but still an impreza just GT model...new for 09 mind you...or do an EJ255 swap which will probably be a pain in the arse than just bolting in a kit and running 6 pounds of boost...everything below the pistons is the same as the wrx its the pistons that tend to go on you after a while so forged pistons would be the problem solver instead of a new engine...the SOHC engine with forged internals is a beast of an engine...just needs some work done to it...and fuel manage but other than that the engine can take it.
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Old 11-16-2008, 01:20 PM   #9
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Quote:
Originally Posted by VIsubi View Post
I use the search method but when I do look it brings up some crap about women like it bigger to cleaning your car..so I'm assuming the search engine on here is pretty crappy ...
Try specifying the forums that you are searching in. You can search for posts/topics in this forum and find exactly what you need.

Quote:
But i was looking into maybe 2.5iGt swap seeing as the new impreza not wrx do come with a turbo charged engine(damn you subby) finally but still an impreza just GT model
The impreza GT replaces the old automatic WRX. It's pretty much the same car. There is still the non-turbo impreza 2.5i or whatever they call it now.

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or do an EJ255 swap which will probably be a pain in the arse than just bolting in a kit and running 6 pounds of boost.
More work but much more reliable. More work leads to a better reward.

Quote:
..everything below the pistons is the same as the wrx its the pistons that tend to go on you after a while so forged pistons would be the problem solver instead of a new engine...the SOHC engine with forged internals is a beast of an engine...just needs some work done to it...and fuel manage but other than that the engine can take it.
Uhh, the EJ255 has a semi-closed deck, better pistons, stronger rods, turbo cams in the heads, and proper routing for supplying the turbo with fluids, etc. The EJ255 is nearly identical to the EJ257 and replacing the pistons in your EJ253(or 251) will NOT yield you an ej257. As far as adding "fuel manage" you would either need to find someone willing to give you an open source tune or need a standalone. Don't mess around with piggybacks, they are a waste of time and can really end up costing you much more than it cost to buy them.
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