2008 impeza 2.5i mods to increase HP's - TriStateTuners.com :: Home of Tristate Auto Enthusiast

2008imprezahatch · 03-27-2008, 09:41 AM

I was wondering what would be the best mods for my new '08 impreza. I know its not an STI or a WRX but would I still be able to use parts labeld for the WRX? I'm finding it really hard to find parts for my impreza so I wanted to see if maybe I could use WRX parts to upgrade my stock Impreza.

I was thinking of installing headers, cat-back exhaust, and a short throw as my first mods to the car. I would love to add a turbo and air to water intercooler but I'm sure that would be at least $2000-which is a little over my price range.

If anyone has any ideas or links to web sites that carry parts for the new Impreza's please let me know.

RyanG · 03-27-2008, 01:54 PM

being that it is a brand new car and being non turbo at that, parts will be hard to come by. You will not be able to use the WRX parts that pertain to the engine but most suspension and interior stuff should work.

Keep an eye on the Open Source software as they are now able to tap into the 2.5na ECU's. Im unsure about the 08 but its only a matter of time. Dropping a turbo kit on that motor is probably the worst thing to do, the NA 2.5 engines are fairly weak.

Renegade_ · 03-27-2008, 02:29 PM

Not gonna lie to you, you aren't gonna get much of anything out of that motor. The naturally aspirated EJ25X line for subarus is notoriously weak for holding boost, and notorious for not responding all that well to bolt ons. Want the car to sound good? Unequal length headers (borlas or borla replicas) and a catback, but you won't gain anything from this setup really.

If you bought a car to throw a turbo on you bought the wrong car in this case. If you do get a full exhaust on the car and get it tuned for it, realistically you would see some moderate gains through the powerband, but don't expect to gain 30whp from this. Unless the N/A 08s got the full AVCS package and a tuner can work some magic with that...

2008imprezahatch · 03-27-2008, 02:30 PM

what the hell....stupid 2.5 engine. Any ideas for good horsepower upgrades on this engine?

2008imprezahatch · 03-27-2008, 02:32 PM

Renegade, what would be a good motor to swap into this car then?

Renegade_ · 03-27-2008, 02:34 PM

Short of splitting open the heads and camming it (which might not be necessary if they got AVCS, which I doubt though) and getting a tune there won't be much power to be had.

Full exhaust, intake, throttle body spacer, and a tune is really it short of camming it, swapping in higher compression pistons, etc and that is definitely out of your price range if you say turboing it is too much... plus its kind of stupid to do that considering its a brand new car.

They kept the single cam 2.5 in the 08s right? They didn't go back to the DOHC design? I don't know much about the 08s, but unless subaru turned around their motor design to respond to modifications well, the track record shows.... not much to be had.

*edit* Why are you swapping in a motor into an 08? Sell the thing, buy a GC chassis for like 3 grand and then buy a WRX motorswap for another 5 grand and you have a 2800 pound WRX would be the logical answer. Either that or buy a used WRX from 02-05.

If you do want the thing to hold boost.... EJ257 shortblock with full standalone and turbo kit. Doing that to a new car though... is kind of dumb. If you bought an 08 base impreza you bought it to be reliable, not go fast.

**Ender81** · 03-27-2008, 02:35 PM

You could swap in the WRX motor but really at that point you should just go trade it in and get a WRX or hold off and see if they really do change what the WRX looks like for 09

DaveSTi · 03-27-2008, 03:45 PM

Why did you buy a brand new 08 n/a to mod and turbo instead of just buying a used WRX?

Vypurr · 03-27-2008, 03:48 PM

I agree. If you want more power, buy a different car. If you want something practical, fun, reliable, and with a warranty, then keep it and don't mod it!

2008imprezahatch · 03-27-2008, 03:50 PM

Long story, I didn't buy the car but it's mine now and now I was just trying to find out my options.

Vypurr · 03-27-2008, 03:51 PM

Drive it and save your cash for a project car! Thats the better option anyways. That way you are not relying on it for your daily driver! You can go nuts with it!

2008imprezahatch · 03-27-2008, 04:15 PM

Yea true....hey thanks a lot guys!

RyanG · 03-27-2008, 04:35 PM

Doug, I see you sent me an email.

we arent far from Philly. About 1hr away

DaveSTi · 03-27-2008, 06:42 PM

I'd keep the 08 stock then. Keep the warranty, gas mileage, and ultimately, the reliability. It'll be nice to have a dependable ride that can take all the paint chips, rock salt, and run on 87 octane without blinking the CEL.

Then use the money saved from mods on the 08 and put it towards a nice WRX swapped GC. Ryan at AREA1320 could guide you very well if you choose that path.

IMO, that's the best way to go in your situation. The n/a motor is great for DD and gas mileage duty, but it really wouldn't respond to mods that well without loads of cash that could be better spent.

K-Rex · 03-28-2008, 04:14 PM

Quote:

Originally Posted by Vypurr

I agree. If you want more power, buy a different car. If you want something practical, fun, reliable, and with a warranty, then keep it and don't mod it!

Couldn't agree with you more. Even minus a turbo that engine is still fun. Do some handling/suspension mods to rip through the corners and call it a day.

K-Rex · 03-28-2008, 04:17 PM

Quote:

Originally Posted by AREA1320

Doug, I see you sent me an email.

we arent far from Philly. About 1hr away

I ran into one of your swaps last weekend. Some young kid in a green 2.2l/WRX swap. Nice work!

RyanG · 03-28-2008, 04:50 PM

ahhhh that would be Sam.

03-27-2008, 09:41 AM	#1
2008imprezahatch Noob-Jersey Join Date: Mar 2008 Location: philly Member #7334 My Ride: 2008 Impreza hatch iTrader: (0)	2008 impeza 2.5i mods to increase HP's I was wondering what would be the best mods for my new '08 impreza. I know its not an STI or a WRX but would I still be able to use parts labeld for the WRX? I'm finding it really hard to find parts for my impreza so I wanted to see if maybe I could use WRX parts to upgrade my stock Impreza. I was thinking of installing headers, cat-back exhaust, and a short throw as my first mods to the car. I would love to add a turbo and air to water intercooler but I'm sure that would be at least $2000-which is a little over my price range. If anyone has any ideas or links to web sites that carry parts for the new Impreza's please let me know.

03-27-2008, 01:54 PM	#2
RyanG Tri-State Post Whore Join Date: Jan 2005 Location: Easton, PA Member #63 iTrader: (1)	being that it is a brand new car and being non turbo at that, parts will be hard to come by. You will not be able to use the WRX parts that pertain to the engine but most suspension and interior stuff should work. Keep an eye on the Open Source software as they are now able to tap into the 2.5na ECU's. Im unsure about the 08 but its only a matter of time. Dropping a turbo kit on that motor is probably the worst thing to do, the NA 2.5 engines are fairly weak. __________________ I am Area1320 To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

03-27-2008, 02:29 PM	#3
Renegade_ Tri-State Post Whore Join Date: May 2006 Location: NNJ/NYC Member #1912 My Ride: 1J Swaggon iTrader: (2)	Not gonna lie to you, you aren't gonna get much of anything out of that motor. The naturally aspirated EJ25X line for subarus is notoriously weak for holding boost, and notorious for not responding all that well to bolt ons. Want the car to sound good? Unequal length headers (borlas or borla replicas) and a catback, but you won't gain anything from this setup really. If you bought a car to throw a turbo on you bought the wrong car in this case. If you do get a full exhaust on the car and get it tuned for it, realistically you would see some moderate gains through the powerband, but don't expect to gain 30whp from this. Unless the N/A 08s got the full AVCS package and a tuner can work some magic with that... __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

03-27-2008, 02:34 PM	#6
Renegade_ Tri-State Post Whore Join Date: May 2006 Location: NNJ/NYC Member #1912 My Ride: 1J Swaggon iTrader: (2)	Short of splitting open the heads and camming it (which might not be necessary if they got AVCS, which I doubt though) and getting a tune there won't be much power to be had. Full exhaust, intake, throttle body spacer, and a tune is really it short of camming it, swapping in higher compression pistons, etc and that is definitely out of your price range if you say turboing it is too much... plus its kind of stupid to do that considering its a brand new car. They kept the single cam 2.5 in the 08s right? They didn't go back to the DOHC design? I don't know much about the 08s, but unless subaru turned around their motor design to respond to modifications well, the track record shows.... not much to be had. edit Why are you swapping in a motor into an 08? Sell the thing, buy a GC chassis for like 3 grand and then buy a WRX motorswap for another 5 grand and you have a 2800 pound WRX would be the logical answer. Either that or buy a used WRX from 02-05. If you do want the thing to hold boost.... EJ257 shortblock with full standalone and turbo kit. Doing that to a new car though... is kind of dumb. If you bought an 08 base impreza you bought it to be reliable, not go fast. __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. Last edited by Renegade_; 03-27-2008 at 02:38 PM.

03-27-2008, 03:45 PM	#8
DaveSTi Tri-State Post Whore Join Date: Mar 2006 Location: Charlotte Member #1591 iTrader: (0)	Why did you buy a brand new 08 n/a to mod and turbo instead of just buying a used WRX? __________________ Member Journals: To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. / To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. / To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. / To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. / To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. / To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

03-27-2008, 02:30 PM	#4
2008imprezahatch Noob-Jersey Join Date: Mar 2008 Location: philly Member #7334 My Ride: 2008 Impreza hatch iTrader: (0)	what the hell....stupid 2.5 engine. Any ideas for good horsepower upgrades on this engine?

03-27-2008, 02:32 PM	#5
2008imprezahatch Noob-Jersey Join Date: Mar 2008 Location: philly Member #7334 My Ride: 2008 Impreza hatch iTrader: (0)	Renegade, what would be a good motor to swap into this car then?

03-27-2008, 03:50 PM	#10
2008imprezahatch Noob-Jersey Join Date: Mar 2008 Location: philly Member #7334 My Ride: 2008 Impreza hatch iTrader: (0)	Long story, I didn't buy the car but it's mine now and now I was just trying to find out my options.

03-27-2008, 04:15 PM	#12
2008imprezahatch Noob-Jersey Join Date: Mar 2008 Location: philly Member #7334 My Ride: 2008 Impreza hatch iTrader: (0)	Yea true....hey thanks a lot guys!

03-27-2008, 04:35 PM	#13
RyanG Tri-State Post Whore Join Date: Jan 2005 Location: Easton, PA Member #63 iTrader: (1)	Doug, I see you sent me an email. we arent far from Philly. About 1hr away __________________ I am Area1320 To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

03-27-2008, 06:42 PM	#14
DaveSTi Tri-State Post Whore Join Date: Mar 2006 Location: Charlotte Member #1591 iTrader: (0)	I'd keep the 08 stock then. Keep the warranty, gas mileage, and ultimately, the reliability. It'll be nice to have a dependable ride that can take all the paint chips, rock salt, and run on 87 octane without blinking the CEL. Then use the money saved from mods on the 08 and put it towards a nice WRX swapped GC. Ryan at AREA1320 could guide you very well if you choose that path. IMO, that's the best way to go in your situation. The n/a motor is great for DD and gas mileage duty, but it really wouldn't respond to mods that well without loads of cash that could be better spent. __________________ Member Journals: To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. / To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. / To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. / To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. / To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. / To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

03-28-2008, 04:50 PM	#17
RyanG Tri-State Post Whore Join Date: Jan 2005 Location: Easton, PA Member #63 iTrader: (1)	ahhhh that would be Sam. __________________ I am Area1320 To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

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