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Old 06-26-2008, 02:37 AM   #1
puppetz007
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Subaru Banner adding a turbo

Have had a 05 2.5rs for about 5 months and have been toying with the idea of a turbo. i need suggestions for the easiest way to do it. thanks.
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Old 06-26-2008, 02:40 AM   #2
Fail Wagon
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sell it and buy a wrx. that is the easiest way. you oculd pick up a 2002 or 2003 wrx for the price of your car probably
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Old 06-26-2008, 12:02 PM   #3
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Quote:
Originally Posted by sirbikealot7 View Post
sell it and buy a wrx. that is the easiest way. you oculd pick up a 2002 or 2003 wrx for the price of your car probably
No, don't just buy a wrx, thats lame. Your gonna get a worse car with more miles, worse condition thats been drivin harder for the same amount of money, its plain stupid. If your serious about adding a turbo to your car contact me via pm, but if you haven't thought about it much and have no idea what youre doing its not worth your time.
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Old 06-26-2008, 07:31 PM   #4
Fail Wagon
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im in the middle of a turbo setup with my car, by no means is any of it easy if you do it yourself, its not physically hard to do but there is a lot of thinking and chasing down parts and fittings and things you have to replace exc. unless you really know your **** about your car and electronics i would not tackle it yourself. im 17 and like all other cocky 17 year olds i figured i could take on the challenge, now i dont have any spark and have had my car out for 2 months. i wont fail but it has been a real pain in the ass and a humbling experience
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Old 06-26-2008, 09:53 PM   #5
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You don't nessicarily need to know everything, a little experience doesn't hurt, but its patience that is important. In most cases doing it yourself is the cheapest solution and if you do it right you will end up with something better than what you could just buy.
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Old 06-26-2008, 09:56 PM   #6
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Sell it and buy a WRX.
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Old 06-26-2008, 09:57 PM   #7
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Quote:
Originally Posted by Chocoholic005 View Post
No, don't just buy a wrx, thats lame. Your gonna get a worse car with more miles, worse condition thats been drivin harder for the same amount of money, its plain stupid. If your serious about adding a turbo to your car contact me via pm, but if you haven't thought about it much and have no idea what youre doing its not worth your time.
Don't listen to this guy. His $5000 build is just beginning and is gonna end with him spending another $10K replacing the POS boosted NA motor with an STI motor, he just doens't know it yet.
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Old 06-26-2008, 10:40 PM   #8
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plus the problems with the rest of your drivetrain. my initial plan was to sell my car and buy a wrx, but my headgaskets were on the way out so i needed to replace them anyway. i didnt want to do the work and spend the money on a 100hp motor so now im going to make it a 250hp motor but have the issue if my drivetrain can handle the extra power. the best and safest and cheapest way to do it is to buy a wrx. oem turbo reliability can not be beat. new age NA motors dont handle boost well. my block on the other hand has a little more tolerance to boost than your high compression 2005 ej25
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Old 06-26-2008, 11:46 PM   #9
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It's tough to admit that you should have bought a WRX but its an admission that many can live with.

The general rule of thumb is that if you can sell your NA car and get enough to buy a WRX then that route should be greatly considered. As others have mentioned, the reliability of a factory turbo'd car will in most cases be better than that of a home build.

If I was in a position to buy a WRX when I first got into Subarus then I sure would have. I don't regret my current course of action as I've learned a lot. Keep in mind that with me, as with many others, I turbo'd an older Subaru that was cheap (paid for on the spot) to begin with and went from there. My next Subaru is on its way and is a 91 Legacy Sport that will also be paid for on the spot. After that, I will find and buy an 02 or 03 WRX wagon because then I'll have a fun reliable turbo car that I can drive while I play with my other two Subarus and mod the hell out of them.

There is one main reason why people desire to turbo an NA 2.5i. That reason...uniqueness. It is indeed unique to have a 2.5i that is turbo'd and on its original block. It will never be a WRX in terms of power and potential but it will be a lot more fun to drive when you're not working out the bugs that comes with adding a turbo to an NA car.

Reasearch carefully and do a lot of it and make the decision you feel is right for you. A turbo project is 85% research 10% build, and 5% solving bugs for 9 months or more (numbers are made-up and not real stats ). I had fun with my turbo but do consider what I was working with. Your car is way different from mine and will pose a lot more problems to be solved.

Good luck and keep us posted.
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Old 06-27-2008, 12:08 AM   #10
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Quote:
Originally Posted by hitman83 View Post
Don't listen to this guy. His $5000 build is just beginning and is gonna end with him spending another $10K replacing the POS boosted NA motor with an STI motor, he just doens't know it yet.
The differences between the EJ251 and EJ257 bare blocks are so minimal that at 400bhp its not gonna make a bit of difference with a good tune. You have no idea what i'm planning, no idea on the parts, my experience, or my knowledge. Only a fool judges someone before getting to know him.



The only real problem with adding power to a 2.5RS/2.5i is the transmission. It will hold if you are a good driver/shifter and don't abuse it. There are many stories about failed transmissions but remember you aren't always getting the whole story.

Everyone always says sell sell sell, but when you think about it selling a car means more hastles. You definately are getting a faster car with more potential with bolt ons. But you are also getting a older car, with more miles, unknown problems, possibly abused, and higher insurance. Not to mention buying and selling a car is a pain in the ass. In my opinion its alot more fun to build a car than just buy one. Anyone can just buy a wrx, but that means you're getting what everyone else has and not something that is built to suit your wants/needs in a vehicle.

Last edited by Chocoholic005; 06-27-2008 at 12:16 AM.
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Old 06-27-2008, 01:31 AM   #11
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Quote:
Originally Posted by Chocoholic005 View Post
The differences between the EJ251 and EJ257 bare blocks are so minimal that at 400bhp its not gonna make a bit of difference with a good tune. You have no idea what i'm planning, no idea on the parts, my experience, or my knowledge. Only a fool judges someone before getting to know him.
Planning is all fine and dandy, it's your actions that count. The differences between the EJ251 and EJ257 are fairly large.. Open deck vs semi-closed deck, better cross hatching, etc.

Quote:
The only real problem with adding power to a 2.5RS/2.5i is the transmission. It will hold if you are a good driver/shifter and don't abuse it. There are many stories about failed transmissions but remember you aren't always getting the whole story.
Huh, really? What about the engine block, heads, EM, crossmember, piping, etc? Those would be problems or nobody would ever have had an issue with them.

Quote:
Everyone always says sell sell sell, but when you think about it selling a car means more hastles. You definately are getting a faster car with more potential with bolt ons. But you are also getting a older car, with more miles, unknown problems, possibly abused, and higher insurance. Not to mention buying and selling a car is a pain in the ass. In my opinion its alot more fun to build a car than just buy one. Anyone can just buy a wrx, but that means you're getting what everyone else has and not something that is built to suit your wants/needs in a vehicle.
Your car + $5000 could probably get you a WRX with a few bolt-ons. Instead, you'll have a car with ~325hp (come on.. bhp isn't real HP on a Subie, too much drivetrain loss) with suspension, brakes, etc. that aren't as good as other models. There's a reason why the 2.5i/RS is cheaper than the WRX. It's not just the turbo/power levels, it's the complete package. That's like buying a WRX, putting a VF22 on it and supporting mods and then saying your car is better than an STI because it's faster in a straight line.
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Old 06-27-2008, 02:06 AM   #12
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1st... im not sayin there aren't differences, im saying for my build 400bhp (350whpish) its not an issue. Its actually 1000x easier using this block and sohc heads because there are no wiring issues or complications you would get with a swap or dohc setup.

2nd... every build has problems, and in my case most of those don't apply, but every case is different. Some N/A 2.5 builds have all of those problems, some have just a few, and the rare couple have none of them. You are making things much harder than they have to be and confusing the people who are trying to learn here with meaningless dribble.

3rd... i could get a wrx with bolt ons for my car plus 5K, and it would probably be in the same shape with the same milage. But if i did that i would get the standard wrx, not something that was specifically built for what i want in a car.
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Old 06-27-2008, 02:19 AM   #13
Fail Wagon
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first. swapping a turbo motor into the NA powertrain was never discussed, therefore your first point is completely irrelevant. and second, i hate it when people over exaggerate when there is no way of measuring how difficult something could be. good luck with your setup man but dont try to convince people that is the easiest way to do it. im doing the same kind of thing but would not reccomend it to someone who is looking for the easiest way to turbo an NA motor. it is by far not the easiest or best way to get boosted.
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Old 06-27-2008, 10:25 AM   #14
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Quote:
Originally Posted by sirbikealot7 View Post
sell it and buy a wrx. that is the easiest way. you oculd pick up a 2002 or 2003 wrx for the price of your car probably
Agreed. If the question is what's easiest, you're in luck. Subaru made a turbo-version of the Impreza - it doesn't get much easier than trading the car in - don't have to even pick up a wrench!
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Old 06-27-2008, 11:52 AM   #15
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Quote:
Originally Posted by sirbikealot7 View Post
first. swapping a turbo motor into the NA powertrain was never discussed, therefore your first point is completely irrelevant. and second, i hate it when people over exaggerate when there is no way of measuring how difficult something could be. good luck with your setup man but dont try to convince people that is the easiest way to do it. im doing the same kind of thing but would not reccomend it to someone who is looking for the easiest way to turbo an NA motor. it is by far not the easiest or best way to get boosted.
i only ever mentioned it being easiest for me, everyone is different.
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Old 06-27-2008, 03:45 PM   #16
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bad link....

Last edited by puppetz007; 06-27-2008 at 03:45 PM. Reason: wrong link
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Old 06-27-2008, 03:46 PM   #17
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http://rallitek.com/avocotukit.html

anyone seen or had experience with this kit?
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Old 06-27-2008, 04:19 PM   #18
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Quote:
Originally Posted by Chocoholic005 View Post
1st... im not sayin there aren't differences, im saying for my build 400bhp (350whpish) its not an issue. Its actually 1000x easier using this block and sohc heads because there are no wiring issues or complications you would get with a swap or dohc setup.
My complete STI swap this year so far has been MUCH easier than my turbo project last year. I swapped in an entire drivetrain, suspension, engine, wiring, etc. compared to simply putting a turbo and a new shortblock in last year. The wiring for a swap is much easier than the installation of a new EMS and tuning that EMS. It also probably takes less time to do the wiring than to do the tuning. If you're going to bring up the argument of paying a tuner, you can also send away your wiring to be merged for you for about the same price as a tune.
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Old 06-27-2008, 07:48 PM   #19
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Quote:
Originally Posted by silentt View Post
My complete STI swap this year so far has been MUCH easier than my turbo project last year. I swapped in an entire drivetrain, suspension, engine, wiring, etc. compared to simply putting a turbo and a new shortblock in last year. The wiring for a swap is much easier than the installation of a new EMS and tuning that EMS. It also probably takes less time to do the wiring than to do the tuning. If you're going to bring up the argument of paying a tuner, you can also send away your wiring to be merged for you for about the same price as a tune.
And for you that was easier, but for me who is using a newer model that will be tuned by flashing the stock ecu and tuned by myself for free, this is easier.
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Old 06-27-2008, 10:38 PM   #20
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Wow.... whole bunch of bickering. You people didnt help solve anything, you just fought back and forth a whole bunch of times... relax, everyone has their own route.Turboing your car is going to be hard... research it a lot and have a lot of determination and it will be everything you want it to become (within your financial bounderies). Thats about it.You need to keep researching and determine what way is best for you.
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