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Old 01-29-2009, 09:41 PM   #1
jbd0419
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Default 08 performance parts?

Hi I've got a 08 2.5i and I was wondering what assortment of parts I can get at the moment for my car I'd like to get at least another 20+ up but I fear this might be unrealistic please point me in the right direction and how much you think the cost will be. Thanks for takin your time. Sorry If this is the wrong section btw.
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Last edited by jbd0419; 01-29-2009 at 10:06 PM. Reason: Invade it's wrong
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Old 01-30-2009, 03:38 AM   #2
howweirdo
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by 20+ up, do you mean hp? and if you do, whp? or at the crank?
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Old 01-30-2009, 04:35 AM   #3
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Quote:
Originally Posted by howweirdo View Post
by 20+ up, do you mean hp? and if you do, whp? or at the crank?

Im going to go out on a limb here and say that it really doesnt matter.

IIRC 20+ ponies to gain for a NA means alot more than a few bolt on mods.

I heard its more money than its really worth?
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Old 01-30-2009, 10:27 AM   #4
Mr_Snips
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a good start would be obviously some sort of intake, exhaust from headers back, and some sort of opensource tune. thats your best bet without starting into harder and harder modifications.
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Old 01-30-2009, 11:46 AM   #5
yarrgh
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Depends on what you want to do. Straight line fast or handling? Looks like you want raw power, but don't underestimate the awesomeness of a rear sway bar.

I'd say to first start with headers/exhaust. If you want the engine to accelerate faster, try lightweight pulleys. If you aren't afraid of taking things apart, look into porting/polishing various things. I have no experience w/TB or intake manifold spacers, but do a search on them. Others have them, but there isn't a whole lot of concrete data for each individual mod.

You'll ultimately have to make your own decisions on what YOU want the car to do. Read read read. Do a good month or 2 of research and then decide on the bang for the buck. Hell, I spent a good while (weeks to months) just looking at the engine to get a feel for what everything did.
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Old 01-30-2009, 03:24 PM   #6
notasubyguy
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Quote:
Originally Posted by yarrgh View Post
You'll ultimately have to make your own decisions on what YOU want the car to do. Read read read. Do a good month or 2 of research and then decide on the bang for the buck.
so true
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Old 01-30-2009, 09:43 PM   #7
PA-Outback2000
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i spent around $2000 on my N/A parts and got about 30HP in the end. i have an intake, pulley, header, cat, and catback.
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Old 01-30-2009, 10:31 PM   #8
jbd0419
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someone told me they thought this would work let me know...


"get turboback ( down pipe + cat back) and/or cold air intake with a protune.
The 08 imprezas have really bad ecu tuning from the factory in order for it to run safely you should get a protune or ecu reflash.
but if you want the best bang for the buck get a catless downpipe and get a cobb acessport when it comes out and re-flash your ecu to stage 2"


Thanks guys!
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Old 01-30-2009, 10:42 PM   #9
obs2008
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Quote:
Originally Posted by jbd0419 View Post
someone told me they thought this would work let me know...


"get turboback ( down pipe + cat back) and/or cold air intake with a protune.
The 08 imprezas have really bad ecu tuning from the factory in order for it to run safely you should get a protune or ecu reflash.
but if you want the best bang for the buck get a catless downpipe and get a cobb acessport when it comes out and re-flash your ecu to stage 2"


Thanks guys!
uhhh. . . . . .you dont have a turbo dude
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Old 01-30-2009, 10:44 PM   #10
yarrgh
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ugh, you don't have a turbo, so you can't utilize a turbo-back exhaust.

you don't have a turbo, so you can't utilize a downpipe either.

and i'm not sure on the accessport, but open source tuning CAN help you.

like I said, READ, READ, READ.

your car is NA, which means Naturally Aspirated. There is no turbo. it sucks in air thru....well, suction.
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Old 02-01-2009, 11:00 AM   #11
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alright thanks bro
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Old 02-01-2009, 01:37 PM   #12
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id say 20 hp gain is very realistic for the ej253. will cost some $. El headers, HFC, catback, a proper intake and a GOOD tune for 91 oct could be a 20hp gain. PA-outback claims 30 and i seriously doubt that due to his UEL header and no tune. without a tune, bolt ons can only do so much. at some point, the bolt ons are not being used to thier full potential because the ECU is only running timing for the stock setup and the AFR's are quite ridiculous with the stock tune.
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Old 02-02-2009, 01:55 AM   #13
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not to hijack the thread but i have an 08 impreza and cant find any good bolt on mods yet. all the exhausts are for the wrx and i have heard mixed things about putting an exhuast for a turbo on a na car. an intake is pretty much going to have to be diy... you guys have any ideas on where to find some stuff or to just wait it out till more stuff starts to come out?
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Old 02-02-2009, 02:03 PM   #14
tylere
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Quote:
Originally Posted by betterstolen View Post
not to hijack the thread but i have an 08 impreza and cant find any good bolt on mods yet. all the exhausts are for the wrx and i have heard mixed things about putting an exhuast for a turbo on a na car. an intake is pretty much going to have to be diy... you guys have any ideas on where to find some stuff or to just wait it out till more stuff starts to come out?
i bought my cat back for my 08 from lachute perfromance. sounds awsome. they also offer a CAI but idk if you into that hope that helped
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Old 02-02-2009, 06:36 PM   #15
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I put a STI 5 Speed Short Shift Thrower, SPT 4 Door WRX exhaust, 1/4" STI Lowering Springs in my 08 Impreza and i like the outcome better control and acceleration. but i am still waiting on my rear sway bar so i was wondering if anybody might know anyone that bought a beefier sway bar for an 08 and up WRX sedan and is willing to sell their old rear sway bar
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Old 02-09-2009, 04:16 AM   #16
PA-Outback2000
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here is a link to my dynos...http://xcceleration.com/imp-gallery-...back.25.na.htm.

i don't want to start another debate, but gains are gains. i know i should have done a true stock "baseline" dyno, but i wasn't in the performance mindset i am in now. i am using the 1st dyno as my "baseline" and will be tracking my gains from now on.

these graphs clearly show i gained i total of peak 25.4WHP and 18.5WTRQ. there is a guaranteed 1CHP for every 1WHP gained, but gains are higher at the engine then 1:1 usually. if you take that, i am at 190CHP, but when you factor in roughly 5WHP for the intake and pulley, i am around 200CHP.

the header, along with the other mods gained 30WTRQ at 3500rpm. this was the most noticeable gain. the more torque you have and the sooner it starts and longer it stays is more important than sheer HP.

facts are facts and this is how my car performed.
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Old 02-09-2009, 04:32 PM   #17
rs2.5-3.0
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are there any issues with bolting on a header or CBE on the Legacy NA? (2008?)
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Old 02-09-2009, 07:15 PM   #18
PA-Outback2000
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you have to do the header and cat. converter together, otherwise there will be a fitment issue. CBE will bolt right up.
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