I just got a 2006 impreza 2.5i and i wanted to get a turbo for it, but a friend of mine suggested I get a supercharger instead because it wouldn't have the turbo lag and the supercharger is easier to install. So basically what I'm asking is what I would need to upgrade along with the addition of the turbo/supercharger.

 

you wont be able to do either without ALOT of money, nobody makes a supercharger for it, and probably never will, nobody makes a turbo for this new of a 2.5 that being said, you should have gotten a WRX, a totally stripped TR goes for around 23K you payed probably around 19-20...

 

Excuse me, there are several '05 kits available for the RS and there is no difference to the '06 motor but the variable valve lift system... which will only help with the boosted machine. AVO comes to mind www.PDXTuning.com and there is a beautiful TWIN TURBO kit out (info is at work in my dealership desk drawer, don't have it at home?). Price $4500 installed. Rock on my NA brothers :-)

Myself. I would go the twin turbo/intercooled route, so when you lift the hood, even your WRX homies will drop jaw at the install!

 

explain to me how you are gonna be able to push that many psi of boost on an n/a 2.5, when they blow up when they are n/a? ive seen at least a dozen blown up/blown head gasket 04 + 2.5s in the last 2 months

 

it isnt a good idea to turn an N/A engine into a forced induction one, they arent set up for it. The parts are weaker and will not handle it very well. What you need to do is wait till one of those hot-shot kids with an 06 wrx crashes it and buy his engine

 

Supercharger with low boost might be ok, but you really should sell it and buy a wrx if your looking for that kind of performance. It wasn't meant to take a ton of boost.

 

but once again, nobody makes a supercharger for it

 

http://www.macfora.com/gallery/showphoto.php/photo/1158

 

What are the parts that wouldn't be able to handle that kind of pressure? And also hows that supercharger run on that impreza?

 

Don'tsell your car.... your car is sick.... You can boost any car... it just depends on how much your willing to pay... if you build your block to handle boost, then you can piece together your own turbo kit... or you can always swap your motor for a ej25T.

 

yeah, you can build the engine to handle boost, but that'll probably cost more than the difference between a 2.5 and a WRX

 

Thanks guys. I talked to my friend who is a mechanic last night and he said he could help me all the way with building the engine so it could handle the power. I love my car too much to sell it so now i just need to scrap up some extra cash...

 

just do a swap, engines that werent meant to handle boost dont do it very well, even when built...an n/a 2.5 is an open deck motor, so are wrx motors, your best bet would get the semi closed deck usdm sti block, a JDM ej20G which is closed deck, or an ej22T which is closed as well, and can be found in first generation turbo legacies.

 

Ah, is this my question?

Most after market turbo kits are 6 PSI kits. This is quite enough when you combine with a higher compression engine. They can do a good job delivering the goods with a strong intercooler and even with a meth/water injection combo. There are quite a few turbo'd RS out there.

A turbo car actually does a good job with a NA/camshaft (even just one). I used an EMS cam (N/A grind) in my Saab twin turbo (in the dark ages) got about 17 whp from that alone. Never popped the engine running 20 PSI for years... and almost 65,000 miles before I sold it. But that engine was shot peened, magnafluxed, balanced, blueprinted and meth/water injected, as well as twin intercooled. The last dyno was 328 whp at 6500 rpm.

Check out your the options with AVO and Rallitek. Also there is a twin turbo package out there, that is almost identical what I put together from scratch in the 80's for my Saab...

There is not a stronger transmission or drivetrain on the WRX vs. the RS. So, you can get the power... and the stock running gear should be in good shape.

 

if i remember correctly, thw twin turbo setup is from http://forcedairtech.com/turbokits_gc8.html... they also have a stage V twin-boost kit... ( turbo and supercharger kit )