3.0 swap!? would it fit in any year impreza?

[RS-ti_Andy]

http://cgi.ebay.com/ebaymotors/02-03-04-Subaru-Legacy-3-0-L-Motor-DOHC-Engine_W0QQcmdZViewItemQQcategoryZ33615QQihZ005QQi temZ150196742232QQrdZ1QQsspagenameZWDVW

its a beastly motor... would it fit in an Impreza?!

[04caliwrx]

Yes it will swap fine, your gonna need different mounts and some problems with the old 2.5rs trany problems but you can do it

[RS-ti_Andy]

woah!... so yeah.. new swap ideas are flying around! haha

[04caliwrx]

I would go with the 2.5 turbo over a na 3.0, turbo is much more fun and the mods cost less....unless you are going for a Perrin STI H3 lol that would be sick!

[RS-ti_Andy]

well duh i wouldnt keep it na lol, it would just be a big weight problem lol

[sebhockey]

The turbo 2.5 is the better route just cause of the cheaper and more available parts.

[RS-ti_Andy]

it would be unique...annnd i know many people who can make any part i need... many people who are very experienced in custom car applications

[sebhockey]

it would be unique...

but expensive

[RS-ti_Andy]

ill look into it

[donutking]

exspenisve from whati have heard but..... i als heard well worth it!

[noisycricket]

I would go with the 2.5 turbo over a na 3.0, turbo is much more fun and the mods cost less....unless you are going for a Perrin STI H3 lol that would be sick!

N/A doesn't have turbo lag. That is why turbos FAIL.

[RS-ti_Andy]

superchargers dont have turbo lag either lol!

[wolfman79]

The H6's do not, I repeat do not like boost of any form without a lot of work. By the time you get done building and tuning a Subaru H6 you could have saved yourself a lot of time and money by just buying a Porsche motor. The 4's are pretty good and fairly simple and cheap to play with in comparison. I'd start with an EJ257 and work from there. If you're sitting on a pile of cash and you prefer to have a more unique motor as to one with performance and reliability then go ahead an give that H6 a shot. I'd love to see it done for a DI car.

[RS-ti_Andy]

hmmm sound like it will be a lost cause lol...hmmm Porsche motor?! hahaha

new ideas! lol

[L and E Fab.com]

H6 = FTL

Turbo = Happiness

[UP2MTNS]

Yes it will swap fine, your gonna need different mounts and some problems with the old 2.5rs trany problems but you can do it

actually, they don't swap easily at all...'different mounts' = custom fabricating new mounting points, its very expensive.

[Anakin_jackson02STI]

H6 = FTL

Turbo = Happiness

++++1 :headbang:

[noisycricket]

actually, they don't swap easily at all...'different mounts' = custom fabricating new mounting points, its very expensive.

Sawzall. Angle grinder. Bandsaw. Drill press. Measuring tape. MIG welder.

Remember too that the engine was engineered to fit in the same space as an EJ, and Subaru is a small and poor company (they have essentially been using the same chassis, engines, and transmissions since FOREVER with detail changes every four or so years, and very rarely a complete overhaul) so they would have made it simple to deal with on the assembly line. I wouldn't bet too hard that if you were too lazy to make new mounts, you couldn't just grab the crossmember from an Outback 3.0 and stuff it under an Impreza and have everything else bolt up well enough.

[UP2MTNS]

I wouldn't bet too hard that if you were too lazy to make new mounts, you couldn't just grab the crossmember from an Outback 3.0 and stuff it under an Impreza and have everything else bolt up well enough.

cool, go for it.

[RS-ti_Andy]

haha totally!

[noisycricket]

Oh no. If I get an Impreza it will be a 1.8 FWD model. :cool:

[rollo]

And there I was thinking that you'd be sure to get an AWD model.. and then pull the half shafts in the front cos AWD is too boring :D

[UP2MTNS]

actually, I mispoke, the mounts line up fine, its a few other things.

from a quick search on Nasioc....PDX and perrin guys did this last year.

The H6 will bolt up to the STi 6 Speed transmission fine, and the engine mounts work as well. You will have to fabricate a number of things for the coolent, the lower cross brace, fueling, and of course wireing. We built a new wireharness using a combination of the H6 harness and the 2006 STI harness.and

As for getting one in your car, we are talking to customers now who want to get this setup. At least for the time being, we are only doing this if the car is delivered to our shop, as there is a lot of custom work involved. Anyone interested should give us a ring!


the project is pretty cool:
http://forums.nasioc.com/forums/showthread.php?t=959768

but for just under 450whp, I think there are easier ways. jmho

[RS-ti_Andy]

wow..amazing! haha ill just take my car to them for the swap! hahah

[noisycricket]

actually, I mispoke, the mounts line up fine, its a few other things.

Wiring, plumbing, no big deal at all. It's all that and more for me to put a 13B from a 1984 RX-7 into a different 1984 RX-7... since I'm not using the OEM computer or wiring harness, and I'm upgrading the radiator, and the crossmembers are different so I had to make a new motor mount bracket... and I'm doing something really low key.

You have to bear in mind, there is at least one six cylinder Impreza currently running in (CRS?) in the US. I forget if it's a 3.0 or the SVX engine, but the point is, six cylinder Imprezas have been done and proven in combat. (Having no turbo means you don't need a restrictor!)

Also bear in mind that Randy Zimmer does really well with a naturally aspirated (four cylinder) Impreza... rotating transmissions out with his tow vehicle (Legacy, he may have switched to another Impreza) as scheduled maintenance.

Now if you want a *swap*, search out the Japanese STi-drivetrained Justy. That's not just different species, they different *phyla*. Or the guys who built a short wheelbase, twin turbo Audi V6 powered VW Fox. A few years back, they solved the weak Subaru transmission problem by using an entire Audi drivetrain in an Impreza. Right down to the Audi brakes and wheels. Still used a Subaru engine.

Wiring and plumbing, that's just an annoyance.

I agree, if you're going to run a turbo, stick with the four. The crank in the 3.0 looks really... scary. They fit six crank throws and seven main bearings in the space where a flat four lives. If you haven't seen one, it looks like a stack of thirteen hockey pucks separated by sheets of paper. Personally, I would have ditched the boxer arrangement and gone for a 180 degree V6 just for crank strength, but maybe they had reasons besides engineering inertia.

PS - You know what's funny rollo... you make fun of my 2wd preferences for fun vehicles, yet you have "Maximum Attack!" in your signature... MaxAttack is the unofficial (yet paying in real money) national 2WD rally championship :D

[rollo]

PS - You know what's funny rollo... you make fun of my 2wd preferences for fun vehicles, yet you have "Maximum Attack!" in your signature... MaxAttack is the unofficial (yet paying in real money) national 2WD rally championship :D

:lol:

That's been in my signatures for longer than MaxAttack has been around, they got it from the same place I did.. I just loved how Tommi would come in from a stage and say it, in typical deadpan Scandinavian style, and it typifies the way I try to drive - fully committed, all out, nothing held back, but not to the point of recklessness. Controlled aggression.

Anyway, I'm not making fun of your preference for 2WD, I'm making fun of your old-school disdain for 4WD :D

For the record I love 2WD cars - my beloved Corrado of course is FWD, and my first car was RWD.. taught me a lot about driving. I've been after a 2nd gen Supra for ages.

[UP2MTNS]

Wiring, plumbing, no big deal at all. It's all that and more for me to put a 13B from a 1984 RX-7 into a different 1984 RX-7... since I'm not using the OEM computer or wiring harness, and I'm upgrading the radiator, and the crossmembers are different so I had to make a new motor mount bracket... and I'm doing something really low key.

You have to bear in mind, there is at least one six cylinder Impreza currently running in (CRS?) in the US. I forget if it's a 3.0 or the SVX engine, but the point is, six cylinder Imprezas have been done and proven in combat. (Having no turbo means you don't need a restrictor!)

Also bear in mind that Randy Zimmer does really well with a naturally aspirated (four cylinder) Impreza... rotating transmissions out with his tow vehicle (Legacy, he may have switched to another Impreza) as scheduled maintenance.

Now if you want a *swap*, search out the Japanese STi-drivetrained Justy. That's not just different species, they different *phyla*. Or the guys who built a short wheelbase, twin turbo Audi V6 powered VW Fox. A few years back, they solved the weak Subaru transmission problem by using an entire Audi drivetrain in an Impreza. Right down to the Audi brakes and wheels. Still used a Subaru engine.

Wiring and plumbing, that's just an annoyance.

I agree, if you're going to run a turbo, stick with the four. The crank in the 3.0 looks really... scary. They fit six crank throws and seven main bearings in the space where a flat four lives. If you haven't seen one, it looks like a stack of thirteen hockey pucks separated by sheets of paper. Personally, I would have ditched the boxer arrangement and gone for a 180 degree V6 just for crank strength, but maybe they had reasons besides engineering inertia.

PS - You know what's funny rollo... you make fun of my 2wd preferences for fun vehicles, yet you have "Maximum Attack!" in your signature... MaxAttack is the unofficial (yet paying in real money) national 2WD rally championship :D

well hey, if all that custom work is nbd to you, then power to you. I'm definitely not anti-NA though, I think it sucks that turbo's cars have restrictors but anyone can build a 500whp V-8 and rally it.

anyway, I'm just making the point to the thread starter than the H-6 swap isn't something to undertake lightly.

[RS-ti_Andy]

dont worry the thread on nasioc can tell us all we need.. i just read all 554 posts! lol

4 people in portlan have H6 swaped wrx's!

[noisycricket]

There *are* displacement limits, mind you... I think the limit for G5 and Open is 5.1l adjusted. (Adjustments go up for pushrod engines and Diesels, down for multivalve heads and forced induction. Also for rotaries :) )

The problem becomes, for a 2wd vehicle, anything much over 250hp is useless on gravel/dirt, as Lancia and Toyota discovered during Group B (Mazda's Group B RX-7s weren't making much more than 250-280hp, so they were outclassed anyway) and Ford learned in Group A. So 2wd is self limiting, so they eliminated the restrictor rule for them several years ago. Giving rise to things like John Lane's 550+hp twin turbo Volvo, among others :) But he even admits that it's ultra mega overkill, he just likes to make spectators duck and cover with his gravel spray...

But for 4wd classes, simply put, you're not going to be able to get a large enough displacement engine into a 4wd chassis that is light enough to work well on stage. You could make a screamer smaller displacement engine (thinking something like a 3 liter V6) but the torque loss compared to 25+psi boost in a 2.3l four could still leave it at a disadvantage... and anyway, the people really interested in running Open are mainly the people interested in running turbo Subarus and Mitsubishis anyway, so any change is unlikely until someone with the desire, talent, and resources decides to shake things up.

I'd do it, but I'm unsure of my talent, and definitely don't have the resources ($50k+ per year, not including actually building/maintaining a car). So we have the status quo.