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Old 06-17-2012, 01:36 PM   #1
recian
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Default 95 impreza 2.2 mods

I've got a 95 impreza with 2.2L awd 5-speed. I've been knocking around the idea of a 2.0 or 2.5 turbo but it seems there's alot of wiring and expense behind it. I can get my hands on a closed deck EJ22 turbo block and I've found a bore and stroker kit for the 2.2 at a decent price and it'll turn the engine into a 2.4L and with forged rods and pistons if balanced with head studs and race bearings i may be able to turn it into a fun engine to play with that you can rev all day with no issues but nothing full race based. It seems doing a turbo on this model requires crossmember mods and more. But with this built engine it's an option down the road. Any thoughts or suggestions?
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Old 06-17-2012, 03:31 PM   #2
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Decide before you build. A turbo build should have lower compression and a differant cam profile.
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Old 06-17-2012, 07:44 PM   #3
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Yeah it seems the more research i do the more confused i get. I'm kinda throwing out ideas as to what can be done. Seems alot of people have done quite a few different builds. Not to mention US EJ22 closed blocks are pretty rare hence expensive. When i think about it I'd like to stick with N/A to avoid extreme ECM remapping. It seems you can use the EJ257 (i assume 03-05 era WRX?) crank, rods and race bearings. My loss is which heads and pistons should i use. Gota know this before i look into forged pistons and aggressive cams. Also not sure if i can still use the EJ22 intake. I've also seen superchargers done modifying a GM eaton v6 supercharger.
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Old 06-19-2012, 08:36 AM   #4
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Quote:
Originally Posted by recian View Post
Yeah it seems the more research i do the more confused i get. I'm kinda throwing out ideas as to what can be done. Seems alot of people have done quite a few different builds. Not to mention US EJ22 closed blocks are pretty rare hence expensive. When i think about it I'd like to stick with N/A to avoid extreme ECM remapping. It seems you can use the EJ257 (i assume 03-05 era WRX?) crank, rods and race bearings. My loss is which heads and pistons should i use. Gota know this before i look into forged pistons and aggressive cams. Also not sure if i can still use the EJ22 intake. I've also seen superchargers done modifying a GM eaton v6 supercharger.
The EJ257 was only in the STi '04 to current. As for using the crank and bearings, I'm pretty sure that's a no-go unless you feel like doing some serious machine work. To the best of my knowledge, the thrust bearing for the EJ22T is in the #3 position, whereas the later engines like the EJ257 have the thrust bearing in the #5 position. I wouldn't worry too much about the stock EJ22T crank, I hear it's forged anyway, and I also hear about people pushing 25 psi on the stock internals all day long without issue.

I have an EJ22T in my garage but I haven't split the block yet so I can't verify rod journal or bearing position, I just go by hearsay for now. Someone correct me if any of my info is wrong.
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Old 06-19-2012, 06:54 PM   #5
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I'm not sure if i should go for upgraded turbo and 22t block or get a stroker kit for the 22t. The stroker kit would have forged internals and larger bore pistons. I can get a 2.4L or 2.6L kit. I'd rather stick with less bore mods and more stroke / lightweight balanced bottom end mods to allow for faster and higher revs. I'd like to stick with n/a just have an engine strong enough i can rev it into the 6k zone without too many issues. I think attempting to turbo this car would pose alot of problems hence it needs a different crossmember, harness and ecu (do they make a flashable ecu for these like hondata?) Personally i want to build a bulletproof fast/high rev engine that wont require extensive wiring or body mods. A sleeper pretty much, not a race car but a fun, quick, nimble car to drive. It's already fun but i would like it a bit faster (ya know fast enough to pass on the highway and surprise some primered hondas) and lower it.
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Old 06-20-2012, 09:58 AM   #6
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Quote:
Originally Posted by recian View Post
I'm not sure if i should go for upgraded turbo and 22t block or get a stroker kit for the 22t. The stroker kit would have forged internals and larger bore pistons. I can get a 2.4L or 2.6L kit. I'd rather stick with less bore mods and more stroke / lightweight balanced bottom end mods to allow for faster and higher revs. I'd like to stick with n/a just have an engine strong enough i can rev it into the 6k zone without too many issues. I think attempting to turbo this car would pose alot of problems hence it needs a different crossmember, harness and ecu (do they make a flashable ecu for these like hondata?) Personally i want to build a bulletproof fast/high rev engine that wont require extensive wiring or body mods. A sleeper pretty much, not a race car but a fun, quick, nimble car to drive. It's already fun but i would like it a bit faster (ya know fast enough to pass on the highway and surprise some primered hondas) and lower it.
Sounds like you're aiming for a powerful NA build...I just don't know how you're going to achieve that without at least an ECU tune. If you're revving high, you're going to need some cams that won't choke off past 6k, and cams with an aggressive/different-than-stock profile like that will probably require a tune or at the very least, maybe a slightly-raised idle speed. Maybe I'm wrong, but it's worth looking into because from all the stuff I've read, it's very difficult to get high power out of an NA without a bunch of ridiculous mods. I'm doing an NA build myself, so I've done SOME research but I know I still have a lot to learn.
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Old 06-20-2012, 01:51 PM   #7
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Thats what im aiming for but ive still got a 4.111 5 speed cable clutch m/t so ive heard theyll handle 250-300 hp so im fairly limited. Im not looking for overkill superbuild because the more extreme it gets the more unreliable it gets ontop of lower mpg. Ive heard my 95 impreza 2.2 is desired and reliable. Plus its only got 130k so i wanted to just stick with a stronger 2.2 or stroker 2.4. Ive read alot of guys who build 22t blocks use delta cams. Can i still use my 2.2 heads? And in tuning the ecm does any company make a flashable / mappable ecu i can tune with say a laptop and software?
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Old 06-21-2012, 10:24 AM   #8
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Quote:
Originally Posted by recian View Post
Thats what im aiming for but ive still got a 4.111 5 speed cable clutch m/t so ive heard theyll handle 250-300 hp so im fairly limited. Im not looking for overkill superbuild because the more extreme it gets the more unreliable it gets ontop of lower mpg. Ive heard my 95 impreza 2.2 is desired and reliable. Plus its only got 130k so i wanted to just stick with a stronger 2.2 or stroker 2.4. Ive read alot of guys who build 22t blocks use delta cams. Can i still use my 2.2 heads? And in tuning the ecm does any company make a flashable / mappable ecu i can tune with say a laptop and software?
I still need to look into open-source tuning, myself; so I'm not sure what options are out there yet. I need to do more research.

As for 250-300hp, that's a LOT to ask from an NA 2.2, even an NA 2.4, just saying. Your 2.2 engine is desired and reliable because the most common build is to swap EJ205 heads on and boost it. I haven't heard of anyone else doing any other serious build with a 2.2 block. I've been meaning to get my hands on an EJ22E so that I can do a little build too, but I have three other projects in progress at the moment so my hands are full.

If you're deadset on an NA build, lower your expectations to about 200-230hp at the crank unless you feel like doing some really serious/expensive mods. I might be able to help you out though, I love swapping pieces from one engine to another, and I think I might have a set of pistons that would bring your compression ratio up from 9.7 to 10.7 or so. PM me if you're interested in talking about that.

Last edited by Jawnzard; 06-21-2012 at 10:30 AM.
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Old 06-21-2012, 10:57 AM   #9
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even 200 crank via NA is going to be a challenge with the 2.2L heads the small intake ports are set up for low end torque production and then there is the issue of lower air flow than other subaru heads.

It's possible but you will need head work and possibly a compression bump
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Old 06-21-2012, 12:49 PM   #10
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I was thinking something along those lines. The na 2.2 produces its power from 2000 to 4000. Nobody mentions what heads they use in builds. Would 1st gen 2.5 or 2.0 dual cam turbo heads fit Or should i look for a complete 2.2 turbo engine and work on those heads. But na 2.2 heads are a dime a dozen around here so grabbing a few sets and working them may be more effective and unique. Also sohc delta cams are cheaper than quad cam sets.
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Old 06-22-2012, 06:44 AM   #11
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Quote:
Originally Posted by recian View Post
I was thinking something along those lines. The na 2.2 produces its power from 2000 to 4000. Nobody mentions what heads they use in builds. Would 1st gen 2.5 or 2.0 dual cam turbo heads fit Or should i look for a complete 2.2 turbo engine and work on those heads. But na 2.2 heads are a dime a dozen around here so grabbing a few sets and working them may be more effective and unique. Also sohc delta cams are cheaper than quad cam sets.
I've heard of people using 2.5 heads and 2.0 heads, so I think either will work. As for the turbo EJ22T heads, I wouldn't bother with those at all. They're almost identical to the NA EJ22 heads except that the intake valves (on the EJ22T heads) are 1/32" SMALLER than their naturally-aspirated counterparts. I think the EJ205 heads seem to be most popular because of availability of parts. Don't swap heads if you're planning on NA though because it'll drop your compression ratio down into the 8's. If you're going NA, stay with the NA EJ22 heads that you have, get a cam regrind, and go from there.
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even 200 crank NA is going to be a challenge with the 2.2L heads ...
He's right, 200chp isn't too expensive on an NA 2.5 block with the right mods, but out of a 2.2L, regardless of heads, I just don't know. My 200-230 estimate is probably still pretty high.

Last edited by Jawnzard; 06-22-2012 at 06:49 AM.
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Old 06-22-2012, 07:08 AM   #12
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Im pretty sure with the turbo block, 2.4 stroker with lightweight crank and H beam rods and 99mm pistons, arp head studs and name brand race bearings, ported 22 heads with delta cams ans of corse less restrictive intake and headers and a good ecm tune you can push it into the 200-250 range. Thats all i really want. And i can push that engine all day with no issues The gc8 2.0 turbo puts out that much. I contemplated that swap originally but to get a good one youre talking $5k
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Old 06-22-2012, 08:59 AM   #13
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Quote:
Originally Posted by recian View Post
Im pretty sure with the turbo block, 2.4 stroker with lightweight crank and H beam rods and 99mm pistons, arp head studs and name brand race bearings, ported 22 heads with delta cams ans of corse less restrictive intake and headers and a good ecm tune you can push it into the 200-250 range. Thats all i really want. And i can push that engine all day with no issues The gc8 2.0 turbo puts out that much. I contemplated that swap originally but to get a good one youre talking $5k
You're going to get the 2.2 bored out to 99mm and get custom pistons for it? This list sounds like it's going to cost you just as much as the $5k swap you're hoping to avoid. I don't think you'd be able to break 230chp even with all those mods...unless your custom pistons are going to be domed like crazy for a high compression ratio; maybe 12 would get you close. I dunno, seems like an expensive long shot.

Why not just buy a cheap 2.5L engine and save yourself $2k in not having to buy a stroker kit?
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Old 06-22-2012, 01:54 PM   #14
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Theres 3 forester 2.5 sohc in a local junkyard but are the sohc phase 1s any good? Plus i want an engine i can push without worrying about internal failure. I know the 2.5s are prone to hg failure and i dnt really wana get into that of corse i can fix it on the bench before install. All i need is a harness engine and ecm? If i can go to the yard and yank $200 worth of parts id rather do that and put stronger internals into that. Im sure 2.5 parts are easier to come by.

Last edited by recian; 06-22-2012 at 02:02 PM.
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Old 06-25-2012, 07:57 AM   #15
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Theres 3 forester 2.5 sohc in a local junkyard but are the sohc phase 1s any good? Plus i want an engine i can push without worrying about internal failure. I know the 2.5s are prone to hg failure and i dnt really wana get into that of corse i can fix it on the bench before install. All i need is a harness engine and ecm? If i can go to the yard and yank $200 worth of parts id rather do that and put stronger internals into that. Im sure 2.5 parts are easier to come by.
Not sure about the Phase I vs Phase II question. I have a Phase II myself in my Legacy and I beat the piss out of that engine without issue. It's bounced off the rev limiter more than a few times, it's been through multiple rallycross events (and I really don't hold back, I'm not afraid to break something). As for the headgasket issue, I've heard that once you replace the head gaskets, you won't have to do it again.

I'm doing the frankenstein build and it sounds like everyone who does it loves it. The only skeptics are the ones who haven't done it, although it is true that the power falls off at the top end around 6k so your plans for a high-revving engine would be out.

You also might want to consider maybe getting an NA 2.5 block, an STi crank and rods, dish out $500 for custom high-compression pistons, cam profile regrind, and have a nice strong high-compression NA. And if you wanted high revs, re-do the valvetrain, pop in some race bearings, and have everything balanced. This is my plan B if the frankenstein engine craps out on me, I don't know if it's really feasible but it looks good on paper
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Old 06-25-2012, 01:41 PM   #16
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Due to money im going with the frankenmotor. Been doing alot of research. stock 2.5 bottom end and rebuild it. Add cometic head gaskets, rebuild some 2.2 phase 1 heads, delta 1000 cams and ARP head studs with upgraded wrx oil pump. I considered ACL race bearings but heard theyre junk. 6k limit wont bother me seeing as my 2.2 drops at 5200 and itll be a daily
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