2.5L turbo into 2006 Impreza

commanderjarak · Post by **commanderjarak** » Mon Dec 07, 2009 10:15 pm

Hey everyone, this is my first post, sorry if it's in the wrong spot. I'm looking at getting myself a newish 2006 Impreza RX, and was wondering something. Will a 2.0L Impreza be able to fit the 2.5L turbo engine out of say a 2006 Liberty GT, or will the engine be too big, and I would need to get an RS to fit it?

Thanks in advance.

d_generate · Post by **d_generate** » Mon Dec 07, 2009 11:37 pm

Unless you are getting the RX for next to free, why bother, you'll need to change the whole driveline from front to back....box, diff, wiring harness etc and still end up with a converted RX...........just not worth the hassle, go look for a cheap WRX instead.
Yes the motors are physically the same and will drop in but a complete waste of time and effort.

commanderjarak · Post by **commanderjarak** » Tue Dec 08, 2009 12:08 am

The only problem is, I'm only 21 and can't really afford the insurance on a WRX. Also, how do the NA boxer engines go with regards to being turbocharged?

I guess I could always just get an RS for now, and then get a WRX when the insurance comes down in a few years.

niterida · Post by **niterida** » Tue Dec 08, 2009 1:13 am

commanderjarak wrote:Also, how do the NA boxer engines go with regards to being turbocharged

Don't bother doing that either - cheaper and easier to buy a turbo motor.

commanderjarak wrote:I guess I could always just get an RS for now, and then get a WRX when the insurance comes down in a few years

Definitely the better way to go unless you want to spend your weekends under the bonnet.

Gannon · Post by **Gannon** » Tue Dec 08, 2009 5:18 am

A RX with a turbo conversion is likely to cost you just as much in insurance as a WRX will

AlpineRaven · Post by **AlpineRaven** » Tue Dec 08, 2009 6:08 am

I agree with these guys above.
Cheers
AP

bobbyjimmy · Post by **bobbyjimmy** » Tue Dec 08, 2009 10:35 am

Or buy an RS now, wait till your forced induction legal and get a Raptor Supercharger kit.

d_generate · Post by **d_generate** » Wed Dec 09, 2009 1:54 am

No laws on turbo or engine capacity in WA so he can go out and buy a Veyron if he's got the money, I'd have a look around for a converted GX or a genuine RS, there is a guy selling a really nice GX - RS conversion on PWRX, the car has a couple of problems but I think he's getting desperate so it might be worth a look.

commanderjarak · Post by **commanderjarak** » Wed Dec 09, 2009 7:43 am

Another thing I just found, looking at the specs, a WRX and Liberty GT have identical power and torque output. What's up with that?

YouTube · Post by **El_Freddo** » Thu Dec 10, 2009 6:22 pm

Probabily using the same motors/setup/ECU. The difference would be in the body weight and this effects the power to weight ratio giving both vehicles a different feel.

As for your RX question: It will work with some effort. I can see why you'd be looking down this path and if you're up for the work I don't see why not. The end product could be a very good sleeper if you don't "rice" it up too much. Subtlety is the key to a good sleeper

My 5 cents...

Cheers

Bennie

commanderjarak · Post by **commanderjarak** » Fri Dec 11, 2009 2:49 pm

Yeah I can see that now. For some reason I thought that WRXs ran 2.0L engines, and the RSs ran 2.5L, but turns out it's the opposite.

And El_Freddo you're the first person to guess why I was thinking about doing it. I do hate being pulled over by cops because I drive a non-sleeper car.

YouTube · Post by **El_Freddo** » Fri Dec 11, 2009 10:09 pm

Non sleeper cars and cops pulling you over depends on what the non sleeper car is and how you drive it...

The early WRX's use the EJ20 turbo and the later models the 2.5 turbo... I think the RS's use an NA 2.5, or the RX's, I get confused about that one...

Cheers

Bennie

commanderjarak · Post by **commanderjarak** » Fri Dec 11, 2009 10:16 pm

According to Wikipedia, since 2005, the WRXs use 2.5 turbos, the RSs and RXs use 2.0L non-turbos. Also I lied before, the Liberty GTs have a few more newton-metres of torque

YouTube · Post by **El_Freddo** » Fri Dec 11, 2009 10:19 pm

Maybe not lied, just mis-informed...

As for the RS/RX thing - a mate of mine has a liberty with one of those prefixes with an NA 2.5 - it goes ok in his mind and he reckons it should have more poke, I'm trying to convince him to go for the raptor supercharger kit

Cheers

Bennie

commanderjarak · Post by **commanderjarak** » Tue Dec 15, 2009 8:21 am

Are the supercharger kits just bolt on, or would I need to do some work strengthening the engine up?

Also, I just realised that I could get a WRX, throw a FMI instead of the top mount, and then change the body and bonnet over to the RS bodykit, and get a BOV that's plumbed instead of venting to atmosphere.

Probably be cheaper to buy body panels than a new engine.

d_generate · Post by **d_generate** » Tue Dec 15, 2009 4:45 pm

You really should be on PWRX asking these questions, lots of useful info over there and a local WRX forum. Just make sure you use the search button or the internet police will be after you and be prepared to be flamed if you ask any really stupid questions.

wrxer · Post by **wrxer** » Fri Dec 18, 2009 2:00 pm

i dont like that the rx are sohc. that is so 1980s

Gannon · Post by **Gannon** » Fri Dec 18, 2009 5:10 pm

wrxer wrote:i dont like that the rx are sohc. that is so 1980s

They are SOHC but still have 4 valves per cylinder, so it is nothing like the SOHC engines like the 2 valve per cylinder EA82

YouTube · Post by **El_Freddo** » Fri Dec 18, 2009 5:12 pm

wrxer wrote:i dont like that the rx are sohc. that is so 1980s

Apparently everything music is 1980's these days...

Cheers

Bennie