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Old 06-01-2010, 11:21 PM   #1
Abill10
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Default More HP for a 2.5I

Hey guys, I have a 2010 hatchback Impreza (manual) and i am looking for a way to add some HP to it. does anyone know of some solid ways to do this? Im ok with spending a lot of time on it, but i would obviously like to spend as little money as possible.
thanks a lot!
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Old 06-01-2010, 11:30 PM   #2
SubieKid707
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If your looking for power, you've bought the wrong car
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Old 06-01-2010, 11:43 PM   #3
Abill10
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Im not looking for anything crazy, just a little extra.
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Old 06-01-2010, 11:44 PM   #4
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a little N/A power cost a lot of $. no way around it.
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Old 06-01-2010, 11:49 PM   #5
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Its still a good platform to have some fun with. I've been working with quite a few N/A cars lately.

Last week I did a 2.5rs, a 2.5i, and a Tribeca. Yes, I tuned a Subaru SUV, lol.

You can squeeze 10-15 whp and wtq ou of the car, if you run 93 octane. I think with a full exhaust, cai, and header, you may be able to achieve as much as 17-20whp with tuning.

Where are you from, Im on here under STi Mikey, if you have any questions or need anything.

-Mikey
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Old 06-01-2010, 11:54 PM   #6
Abill10
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hey thanks man! im from Illinois, and kind of a rookie when it comes to putting stuff on my car. would the parts be expensive for bumping it up 15 or so?
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Old 06-02-2010, 12:00 AM   #7
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Quote:
Originally Posted by PhatBotti Tuning TKR View Post
Its still a good platform to have some fun with. I've been working with quite a few N/A cars lately.

Last week I did a 2.5rs, a 2.5i, and a Tribeca. Yes, I tuned a Subaru SUV, lol.

You can squeeze 10-15 whp and wtq ou of the car, if you run 93 octane. I think with a full exhaust, cai, and header, you may be able to achieve as much as 17-20whp with tuning.

Where are you from, Im on here under STi Mikey, if you have any questions or need anything.

-Mikey
And have supporting mods. The base timing is already way too aggresive for 93octane when you drive it off the lot. The advance isn't even being completely used, even on 93 octane.

Discalimer: this is verified for 05-09's. If 2010's are different, I'll kiss your ass.
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Old 06-02-2010, 01:27 AM   #8
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I was going to say...Man, I need to start using me some 93 octane
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Old 06-02-2010, 04:02 AM   #9
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I love my 2.5i wagon. My best advice is to put some money into the suspension of your vehicle and not so much into the powertrain. I've found its a lot more fun to go fast through corners rather than a straight line. Good luck with your mods OP
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Old 06-02-2010, 02:01 PM   #10
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The 2.5i just isn't a modable engine
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Old 06-02-2010, 02:34 PM   #11
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hybrid intake, headers, exhaust, as much of a tune as you can pull out of it (you may have to buy one of the RalliTek accessports).
You'll still pick up only a tiny bit of power. Your money is better spent on suspension mods.
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Old 06-02-2010, 03:06 PM   #12
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Do they make a Raptor supercharger for the 2010s?
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Old 06-02-2010, 03:17 PM   #13
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You can spend 300 dollars on cams from Rallitek, 595 dollars for the Accessport, 50 dollars for the AVO panel filter, and 899 for the AVO catback and STILL only see a 37WHP gain. Put your focus into the suspension and tires, you'll at least have fun driving it instead of crying every time you put thousands of dollars into your car with minimal gain
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Old 06-02-2010, 03:47 PM   #14
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Quote:
Originally Posted by jewishcowboy View Post
The 2.5i just isn't a modable engine
the problem is NO one ever tries anything on a EJ253 and we dont have any standalone engine mngmt or a large market to push the Aftermarket to develop any thing for this platform. I
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Old 06-02-2010, 07:04 PM   #15
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Quote:
Originally Posted by GEE-OTTO View Post
the problem is NO one ever tries anything on a EJ253 and we dont have any standalone engine mngmt or a large market to push the Aftermarket to develop any thing for this platform. I
What do you mean "NO one ever tries anything?"
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Old 06-02-2010, 07:26 PM   #16
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Quote:
Originally Posted by SubieKid707 View Post
What do you mean "NO one ever tries anything?"

Ok there are a few people with screws loose that have done some improvements to there n/a 2.5i but overall most of the subie world is focused on the turbo equiped motors.
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Old 06-02-2010, 07:42 PM   #17
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Quote:
Originally Posted by vrusso View Post
Ok there are a few people with screws loose that have done some improvements to there n/a 2.5i but overall most of the subie world is focused on the turbo equiped motors.
Do I have screws loose?
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Old 06-02-2010, 08:40 PM   #18
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Quote:
Originally Posted by SubieKid707 View Post
Do I have screws loose?
yes you do! but its alright all of us with the n/a 2.5is do that want more engine performance. its way easier to just get a turbo model and you'll get way better results.
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Old 06-02-2010, 08:43 PM   #19
Abill10
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thanks guys! this gives me a better idea of what to do. tires and suspension are a must i think. after that, maybe the hybrid intake. i am wondering why the hybrid one? whats the difference?
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Old 06-02-2010, 09:34 PM   #20
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PhatBotti Tuning TKR must be an undercover executive from BP... Buy 93, were dying here ha.

I had all the bolt-ons on my 05 RS. Intake, exhaust and headers and honestly it made the car louder and no more powerful or quicker. Looking back it made it seem slower because you hear these noises, it's loud, but you arent going anywhere too fast.

If I were doing it all over again, I would have just left it at a nicely upgraded suspension and enjoyed the car for what it was.
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Old 06-02-2010, 09:47 PM   #21
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Quote:
Originally Posted by Audi20Tdriver View Post
PhatBotti Tuning TKR must be an undercover executive from BP... Buy 93, were dying here ha.

HAHAHAH!
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Old 06-03-2010, 02:29 PM   #22
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I had all the bolt-ons on my 05 RS. Intake, exhaust and headers and honestly it made the car louder and no more powerful or quicker. Looking back it made it seem slower because you hear these noises, it's loud, but you arent going anywhere too fast.

If I were doing it all over again, I would have just left it at a nicely upgraded suspension and enjoyed the car for what it was.[/quote]


Agreed!
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Old 06-03-2010, 10:38 PM   #23
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Quote:
Originally Posted by mikEimpreza07 View Post
yes you do! but its alright all of us with the n/a 2.5is do that want more engine performance. its way easier to just get a turbo model and you'll get way better results.
Couldn't have said it any better myself. Set yourself up with some suspension mods and some sticky tires. IMO a drop in filter is an easy way to allow your engine to breathe easier. Good luck and have fun
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Old 06-03-2010, 11:10 PM   #24
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Originally Posted by SubieKid707 View Post
Couldn't have said it any better myself. Set yourself up with some suspension mods and some sticky tires. IMO a drop in filter is an easy way to allow your engine to breathe easier. Good luck and have fun
Your opinion is wrong. A drop in filter will do absolutely zero for a stock or even lightly modified 2.5RS/i. Well, it will allow more dirt to pass and can get oil all over the MAF sensor, but besides that it will do nothing to help.
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Old 06-03-2010, 11:33 PM   #25
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Originally Posted by SubieKid707 View Post
Couldn't have said it any better myself. Set yourself up with some suspension mods and some sticky tires. IMO a drop in filter is an easy way to allow your engine to breathe easier. Good luck and have fun
No, tests have shown that the regular OEM paper filters have either surpassed or equaled the airflow of an aftermarket drop in filter like K&N, but still doesn't get your MAF dirty like "high air flow" drop in filters do.
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