SO.. I want a 3.0

[Tris_STi]

Since there are oh so many H6 3.0 Outbacks rolling around, and some of them sitting in JYs from wrecks, what are your thoughts on robbing the H6 and putting it in my '92 sedan? What's required?

I'm not sure of the engine code, though I know EJ engines and trannies are legos, but I've never heard of the H6 going into anything, either..

Bad idea? Good idea? Only in theory?

I've been craving torque, and I kinda wanted to create my own backyard 3.0R.. :twisted:

[ooberdoob]

well there is a guy over on nasioc dropping an EJ33 in his legacy (think SVX) and apparently its going alright.

there is hope, sure, but no more good info from me!

[shazapple]

the hardest part would be converting your car from OBDI to OBDII, along with the rest of the wiring nightmare

[Pwise2326]

Exactly, the H6 is an EZ30 something or other, which means your EJ tranny wont bolt up, which means you'll need a new tranny, driveshaft, and rear end, which means you may have to get a custom made driveshaft because I think the newer OB's are just a tad longer than your car (I may be wrong, but it seems like a fair guess). I saw one dropped into 93 or 95 Impreza, and boy-o-boy did it look tight...that engine is a beast in size compared to your EJ. My guess is it would fit, but your best bet would be to ask around and see if anyone has done it or knows of anyone who has (ask some of the vendors or subaru specialist shops, they may have done it or know of someone who has. It will definatly be a nightmare in terms of getting it to fit and bolts to match up and the wiring will be something of a good glimpse as to what hell is. If you have all the money needed to get all the parts to swap it over, get it in, get all the things to bolt it up, or get parts fabricated, I'd say you are a.) a goddess, and b.) awesome! Good luck with everything, I'll see if I can find that website with the writeup on the H6 swap into that 93 or 95 Impreza (at least both are the same chassis).

[Tokio]

http://linaracing.com/impreza-h6-conversion-faq.cfm

:-D

[Pwise2326]

Thats it! Read away, the pictures are at the link up top.

[Wiscon_Mark]

which gets better mileage? 2.5T or 3.0? They're the same HP rating as far as the 2005 legacies go.....

[Pwise2326]

From what I gathered from an '05 LGT owner at a gas pump one day the thing gets around 14mpg...depending how you drive. I haven't seen any numbers, check the subaru site, should have them listed there. I would assume the turbo would be more fuel efficient...but the H6 can't be less than 14mpg...that'd be nuts.

[Tris_STi]

Thanks, Pwise.
I've been dreaming of how much torque could actually be had with a 3.0 in my 92.. which would be nice to say the least! What would be the difference if I went with a an EJ33, instead? Aside from SVX tranny problems, they're overall good cars, right?

[Tris_STi]

Ugh, after reading all that, I don't wanna. *sigh* I really really didn't want to go FI, but it's looking like that's what it takes to go fast. Damn you turbo people, damn you!

[gator gt]

well depending on your goals for the car, you don't need to go FI. More displacement is what gets you the torque. Thus FHI brought over the 2.5L STi for us torquey Americans. There isn't much torque in the EJ20t as compared to the EJ25t.

PhatSuby (on NASIOC) is dropping in a quasi-new EZ30 (JDM) which also has AVCS, IIRC. That will really pull hard.

The early H6's were out of the SVX (or Alcyone in Japan, IIRC) and were coded EZ33; = 3.3 liters.

And you'd get the same amount of torque he would (if he'd leave well enough alone....but he isn't. He feels the need to turbo it :twisted: )....but you'd have a better power to weight ratio. It'd be through the roof.

GGT

[Tris_STi]

I didn't know they made an EJ30.. I'll have to research the EJ lineup and find which one I want, although I think a built 2.5 could fulfill what I want it to do.. I really just want more power, that's it. I'm not driving 1/10th.. ya know?
AVCS, what is that?

[Pwise2326]

I forget what the acronym means but I want to say thats subaru's variable valve timing found on the newer JDM engines..not sure if the new STI blocks have AVCS yet...then again, correct me if I'm wrong.

[Tris_STi]

I figured it was some kind of timing dealie.. sounds neat. Looks cooler than VTEC, anyway.. heheeh..

[Tris_STi]

Advance(d) Valve Control System?
Variable Cam something-or-other?

[legacy92ej22t]

I've heard that the new EZ30's leak oil like crazy. Just something to think about Tristan.

[Tris_STi]

shhh! you'll give away my secret identity here!

[SC00BS]

One of the boys in Australia is doing the 3.0l conversion with a big turbo. His power output is expected to be around 700hp :shock:

[Tris_STi]

SUHWEET.

If I was tryna get 700hp, though, I think I'd put it in a drift-spec Altezza.

[badbasser98]

If you are looking to the 250hp range, about how much the 3.3's make. You could always talk to the boys over at COBB. Last time I checked with them they made a N/A 2.5l that is strong enough to handle everyday driving that put out 250hp. Think the price was some where around 5-6 thousand along with sending them your old engine core. Have to check their site again for the exact details. Might be a much smaller headache than trying to rewire your entire car... although you would probly have to make the same changes since your car is a 92...

Anyone else have an opinion on this route?

-BB98

[Tris_STi]

It's a good route to go, and it's probably what I'll end up doing. I don't want a turbo, and I'm pretty confident an NA 2.5 would be able to give me what I need. I'll go with some cams, and the usual bits, but nothing more. I don't need to be THAT hardcore. I'd rather be a better driver.
I'll be scoring a 2.5L from somewhere, but I'm not sure when or where.. Still searching.

[sheepdog]

I may have a 2.5RS motor somewhere in the next 6 months. Ill keep you posted.

[Wiscon_Mark]

tristan, you should really put a big turbo on a EZ30 :lol:

I'm a big fan of N/A

Its a lot more original, IMO.

[Tris_STi]

tristan, you should really put a big turbo on a EZ30 :lol:

I'm a big fan of N/A

Its a lot more original, IMO.

I think a monster NA would be really really cool. If I can get InSaNeAzNkId to reply, I'm gonna get his shortblock.

[Wiscon_Mark]

I think a monster NA would be really really cool.

Yes it would :shock:

[badbasser98]

I think a monster NA would be really really cool.

Well, that's what I hope to do someday, unless gas is $15/gallon... :?

[AFBeefcake]

I just read this whole thread and being a SVX owner I thought I would straiten out some miss information.

SVX has a EG33
Newer outback has a EZ30

Any EJ series trany will bolt up to a EG33, but I think there will be two unused holes in the EG33 block.

Many SVX owners have installed wrx and GC8 5 and 6 speed tranys in there SVX.

EG33 uses a timing belt
EZ30 uses a timing chain

EG33 has IRIS (Induction Resonance Intake System)

There is currently a company building a Super charger kit for the EG33 (ecutune). It runs at 6-7 PSI and will put out around 400 HP.

[Wiscon_Mark]

There is currently a company building a Super charger kit for the EG33 (ecutune). It runs at 6-7 PSI and will put out around 400 HP.

damn, I guess I need to get me an EG33, that supercharger, and a 6MT for my subie :lol: :twisted:

That would be a good route, IMO, if it weren't super expensive

[sheepdog]

You could get a supercharger AND a turbocharger ;)

I know thats silly. Although, I have seen it done on an RB25TT and and M3. Mucho expensive, but also mucho fast :twisted:

[Wiscon_Mark]

what would be ideal, is a supercharger/turbo setup where the supercharger turns off when the turbo is fully spooled. Talk about low and high end torque :twisted:

but back to NA!

I'd like to hear what you do with that shorblock Tristan :D

[filter27e]

Ok not trying to make any restatements or anything but you all caught the part in the FAQ where he said that the EZ30 bolts right up to stock EJ transmissions right? Means no need to change drivetrain (until you brake it) and leaves plenty of room for turbo in theory.

[gator gt]

Yes, thats what the statement means....he is saying that nothing needs to be modified for proper mating up between an EZ motor and an EJ-style tranny.

....and I think you mean 'break' it.....or was that engine brake?

You can go ahead and figure out whether you can safely strap on a turbo onto an EZ30....there is one such pioneer on NASIOC (and I think 1 before him) who is tackling the project of a late model EZ30, turbo'ing it and mating that to a STi 6MT.

BUT, he is re-working the internals. Have fun.

And if you plan on turbo'ing an EZ30; then plan on either not using it to its fullest potential, then go ahead and pick any ol' EJ tranny.....or you going to have to get a 6MT if you want to have fun. People talk about making the RS or WRX gearbox stronger by adding RA gears, which are stronger GEARS....but I think that's just a bandaid cause the CASE is still the weakness in that equation = flex under load.

6MT = IF any flex, FARRR less than a 5MT factory box.

GGT

[filter27e]

umm yeah I was tired when I wrote that anyways and that's a word I'm bad for switching spelling of lol... I did mean "break" it. And all of that stuff is EXACTLY what I'd do. Right after I win the lottery. *runs to convenience store real quick*

Chances of any of us doing above said mods are pretty slim so it's just fun thought.

[Wiscon_Mark]

who are you, filter27? anyone we know, or acquainted with a member? Just out of curiosity...

[Tris_STi]

RS-RA gearsets are marginally better than stock. They are not the be-all end-all uber-ultimate gears. You can still break them, if you halfway tried.

[gator gt]

Chances of any of us doing above said mods are pretty slim so it's just fun thought.


Hi, I'm slim, have we met? :lol:

I'm working on a JDM Ver8 and 6MT swap....actually collecting pieces....yes to go into a 2nd gen Legacy.

You guys will know when its done.....

Tris, the only reason I stated it like that, is due to the huge number of people going for RA gears vs. the 6MT....but part of that is the sheer capital needed for the 6MT.....but if you're serious about the power, you can spend the extra coin for the 6MT and not risk a whole lot.


GGT

[filter27e]

I started posting before I made my introduction post, how rude of me :oops: :lol: So I'm mostly aquainted now, and think I live near a couple of guys on ere but otherwise just stumbled across here by a link on NASIOC.com.

[Wiscon_Mark]

couple of guys on here? who?

[Pwise2326]

Mark -- this is not the place to pry you whore! Back to topic: Wouldn't modifying the ej tranny to fit an EZ mess something up as well? I would guess you'd have to drill new mating holes...and drilling holes in places that aren't reinforced for the stress that's going to be exerted against the bolts that are attached through them can possibly = cracked case? I just don't like the sound of it.

[gator gt]

Ryan, I don't think there needs to be any mods to the tranny to mate up to the EZ. Thats what the 1st couple posts on this page is trying to get straight.

PhatSuby on NASIOC is mating a 6MT to a EZ30....he hadn't mentioned that he needed to modify the surfaces or bolt holes to complete that portion of the project.

I think where it becomes an issue is where people try to mate a current style tranny to an EG33 (aka SVX).

GGT

[Wiscon_Mark]

I think where it becomes an issue is where people try to mate a current style tranny to an EG33 (aka SVX).

I thought AFBeefcake said that there was no problem when he did it (he owns an SVX).... :shrug:

[scottzg]

eg33 = ej22 with 2 extra cyls and dohc. Pretty much anything for an ej22 works for the eg33, including the wrx trans, and iirc the timing belt.

[Wiscon_Mark]

eg33 = ej22 with 2 extra cyls and dohc. Pretty much anything for an ej22 works for the eg33, including the wrx trans, and iirc the timing belt.

Yeah, exactly. 2.2....3.3, same engine, block is a little longer with 2 extra cylinders.

[Huffer]

If the H6 engine fits into LinaRacing's Impreza, then there's no reason it won't fit into the Legacy.

Probably a little more room to manuever too.

Also, the reason the STi was created in the US with a 2.5L is because Subaru didn't want to compromise the performance of the car because of the stricter EPA regulations. Generating sufficient power was only possible by using a larger displacement coupled with a mid-sized turbo.

There are a tonne of STi's in Japan, NZ, Australia and the UK that put out the same power as a stock USDM STi. the "206kw" ceiling was a "gentlemans" agreement between major Japanese car manufacturers.

Also, WRC rules prohibit the use of engines bigger than 2.0L.

Anyway. An H6 conversion isn't impossible. The biggest headache would be the wiring loom.

[legacymax]

Personally, i would stay away from the EZ30, i don't like the fact it uses a timing chain. It will fit better in a legacy than the EG33 but the cylinders are closer together, meaning thinner cylinder walls, meaning not as strong as a block. I have seen a EG33 in a legacy but i am pretty sure they had to do something with the radiator. The EG33 would be better for boost because you can put ej22t low compression forged pistons(same bore and stroke).
-max

[Wiscon_Mark]

Tristan ended up getting a WRX swap anyways ;)

but I agree, the EG33 Engine is basically an EJ22 with two more cylinders, its a very good engine, leaks a lot less oil than the EZ30, and there's no replacement for displacement. The EG33 is a torque monster.

However, it doesn't have AVCS, like the EZ30.