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Old 07-02-2010, 01:52 PM   #1
lionsault
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I have a 2010 N/A Impreza, I kinda gave up looking for a good exhaust and am willing do dish out a couple of month to buy a borla exhaust for my hatch. But I was wondering, could I buy a intake manifold for my a car that would add power or what does it do? Sorry for the stupid question.

Edit: Also I wanted to know if I could ever slap a after market turbo onto my car. Nothing big, maybe something about 6-12 psi.
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Last edited by lionsault; 07-02-2010 at 02:01 PM.
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Old 07-02-2010, 02:32 PM   #2
yarrgh
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nope. you will notice nothing w/IM.

search on the turbo question, it's been asked/answered so many times already. It's not worth the cost.
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Old 07-02-2010, 04:35 PM   #3
feint05
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you own an n/a subaru, only do asthetic and suspension mods, if you want power sell your car and buy a wrx or sti, the money spent to make your n/a a fraction of the power will bridge the gap in price
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Old 07-02-2010, 06:30 PM   #4
jarencibia
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Yeah it would be more economical to sell your 2.5i and buy a wrx if you want to go faster. Plus if you swap your NA for a turbo engine your resale value on the car will be crap.
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Old 07-02-2010, 06:52 PM   #5
chazly413
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Get a TWE exhaust manifold. Good increase in area under the powerband curve.
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Old 07-08-2010, 05:29 PM   #6
ederd2003
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if you want a fast car buy a wrx or sti. if you want a fun car to drive keep the 2.5i add suspension and exhaust there you go.

you can get an aftermarket turbo but you'll probably only get 6 psi max, or you can supercharge it. either way you wont get the same numbers any wrx or sti get (over the 300hp)

2.5's are great cars but they arent anything like a wrx or sti with a bigger turbo. its up to you really.
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Old 07-08-2010, 05:47 PM   #7
mikebdubsuby
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Listen to what everyone here has said.

I bought my 04 RS and thought a swap would be simple/fast/cheap, your car will be down for a long time, you will end up spending probably double what you originally anticipated, and it still won't have the interior/suspension/exterior an sti or wrx has.

You're better off either keeping your 2.5i and doing the suspension and an exhaust or just trading it in.
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Old 07-09-2010, 12:57 AM   #8
jeonster
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"if you want a fast car get a blahblahblah"
It's seriously a broken record on this forum.

Anyways, go with suspension and just imagine that your car is the fastest thing out there.
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Old 07-09-2010, 01:09 AM   #9
chazly413
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You can do mods that can free up a little potential out of the stock 2.5, but to add serious power, you're looking at cams and stuff like that which is money and time. If straight line speed is not a big thing to you, like it isn't to me, I'd do those "freeing up potential" mods and suspension stuff.

I plan to keep my car until I run it into the ground so I may do cams at one point, but for now, suspension and "freeing up" mods.
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Old 07-10-2010, 11:57 AM   #10
wmdoucette
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Quote:
Originally Posted by chazly413 View Post
You can do mods that can free up a little potential out of the stock 2.5, but to add serious power, you're looking at cams and stuff like that which is money and time.
Cams are cheap and easy to change, will net notable gains and if you don't want a torque grind you can have no down time and buy from Rallitek, I think they are even on sale.

Making power out of an NA engine is way more fun because you have to actually try and use your brains and stuff. It's not just a simple matter of some 3" piping and poof the car is faster! It sure does cost more though.
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Old 07-10-2010, 12:25 PM   #11
feint05
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Quote:
Originally Posted by wmdoucette View Post
Making power out of an NA engine is way more fun because you have to actually try and use your brains and stuff. It's not just a simple matter of some 3" piping and poof the car is faster! It sure does cost more though.
LMAO if thats what you think your misinformed, it may be easier to get power but there is alot more to understand in a turbo car, and if you dont do alot of research you will make that thing explode. Take it from someone whos had 2 n/a subies and 1 turbo one. N/A is easy it just cannot yeild the gains that forced induction can.

on my rs it was all about suspension and wheels
check out rallitek cause they are awesome and afffordable
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Old 07-10-2010, 02:34 PM   #12
Patrick Olsen
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Quote:
Originally Posted by lionsault View Post
But I was wondering, could I buy a intake manifold for my a car that would add power or what does it do? Sorry for the stupid question.
You already have what is probably the best intake manifold available, turbo or N/A, so there's nothing more to gain. You could possibly get a cold air intake, but read the Sticky about CAI/SRAI at the top of this forum before you jump into that.

Quote:
Originally Posted by lionsault View Post
Edit: Also I wanted to know if I could ever slap a after market turbo onto my car. Nothing big, maybe something about 6-12 psi.
Could you? Yes. Would it be economical to do so? Almost certainly not.

Quote:
Originally Posted by ederd2003 View Post
you can get an aftermarket turbo but you'll probably only get 6 psi max, or you can supercharge it. either way you wont get the same numbers any wrx or sti get (over the 300hp).
Why is that? With proper tuning you can certainly make at least WRX numbers, if not more, due to the added compression of the N/A engine. Before any of you kids even knew this forum existed there were guys running turbo'd 2.5RSs that put down better power than the WRXs. It can be done, it's just not as easy as starting with a factory turbo powertrain.

Quote:
Originally Posted by feint05 View Post
LMAO if thats what you think your misinformed, it may be easier to get power but there is alot more to understand in a turbo car, and if you dont do alot of research you will make that thing explode.
Sure, if you're trying to make retarded power the potential is there to destroy an engine. But a simple downpipe, 3" exhaust, and readily available reflash will net you substantial power gains and a much fatter torque curve without touching anything on the engine. I think that's all wmdoucette was trying to say, and he's exactly right.
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Old 07-10-2010, 04:25 PM   #13
chazly413
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Quote:
Originally Posted by wmdoucette View Post
Cams are cheap and easy to change, will net notable gains and if you don't want a torque grind you can have no down time and buy from Rallitek, I think they are even on sale.

Making power out of an NA engine is way more fun because you have to actually try and use your brains and stuff. It's not just a simple matter of some 3" piping and poof the car is faster! It sure does cost more though.
Yeah, I mean I'm most certainly going to do cams at some point in my cars life time, it's just not ideal for some people to do them.
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Old 07-10-2010, 07:40 PM   #14
wmdoucette
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Quote:
Originally Posted by Patrick Olsen View Post
Sure, if you're trying to make retarded power the potential is there to destroy an engine. But a simple downpipe, 3" exhaust, and readily available reflash will net you substantial power gains and a much fatter torque curve without touching anything on the engine. I think that's all wmdoucette was trying to say, and he's exactly right.
Yup, sorry to generalize. I meant bolt on power is easily available for a turbo car, NA you have to dig a bit deeper (Eagerly awaiting building an 11.2:1 EJ257/3 )
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Old 07-10-2010, 07:45 PM   #15
kriswrx
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be happy with what you have. if you want power you need wrx or sti.
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