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Old 08-23-2008, 01:16 AM   #1
subiekidd401
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Default td04 on my 04rs???? help

i have an 04 2.5rs in its prime (60xxx) miles i wanted a little more power and i have come across and 02 td04 stock turbo for a nice price would that be a nice starting point to turbo my car i know i need a ton of other parts and tunes but thats not the point i just wanted to see if the td04 would cause nice power but low risk of really messing things up in the long run
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Old 08-23-2008, 02:07 AM   #2
Jubert69
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doing this and setting this up i think would cost around 1k, why dont you just save up for a swap?
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Old 08-23-2008, 02:10 AM   #3
ronoverdrive
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There's another section for this. Its called Normally Aspirated with bolt-on Forced Induction Powertrain. You'll be able to find all the info you need there.
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Old 08-23-2008, 10:40 PM   #4
RS 1986
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have fun barely getting any gains and increasing the chance of blowing up your engine by a lot
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Old 08-26-2008, 06:15 PM   #5
Subaruski
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ask your parents to buy you a wrx...

seriously though it is a complete waste of time to turbo the n/a ej25
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Old 08-26-2008, 06:26 PM   #6
sense of nature
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^^ true true
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Old 08-27-2008, 02:26 AM   #7
ballitch
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Quote:
Originally Posted by Subaruski420 View Post

seriously though it is a complete waste of time to turbo the n/a ej25


Maybe you should tell this to reddevil, and several others that have turbo'd N/A EJ25's.

If you really want to turbo your car, find someone with some knowledge, and have them swap in an EJ22 block under your heads, instant compression ratio drop, no need to swap pistons.

Do a little snooping around the AFI forum, this isnt the first time someone has asked this question.

With the cost of all the parts needed (and there are alot) you really might want to crunch the numbers on this one, you might be better off buying a turbo motor off ebay (one that comes with all the fixens) and using that instead.

But me personally, I would throw an EJ22 shortblock in there, and not think twice about it.



~Josh~
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Old 08-27-2008, 11:18 AM   #8
Subaruski
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Quote:
Originally Posted by ballitch View Post
Maybe you should tell this to reddevil, and several others that have turbo'd N/A EJ25's.

If you really want to turbo your car, find someone with some knowledge, and have them swap in an EJ22 block under your heads, instant compression ratio drop, no need to swap pistons.

Do a little snooping around the AFI forum, this isnt the first time someone has asked this question.

With the cost of all the parts needed (and there are alot) you really might want to crunch the numbers on this one, you might be better off buying a turbo motor off ebay (one that comes with all the fixens) and using that instead.

But me personally, I would throw an EJ22 shortblock in there, and not think twice about it.



~Josh~
I was never saying it was not possible, just a waste of time...
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Old 08-27-2008, 12:04 PM   #9
KaptainKandy
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Calculate costs...including a good tune compared to a WRX or STi swap before you jump. Not impossible to run an RS-T as it has been done by tons of people but from what I have read is that it can be a pain and get costly. Often times a full swap tends to be more reliable. If its a DD stay N/A or swap, otherwise if you have the mechanic knowhow and it is a project than go ahead.
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Old 08-27-2008, 02:48 PM   #10
Subaruski
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2004 impreza is new enough in my mind that if i wanted a turbo impreza i would sell it and buy a wrx. Yeah some people are gonna say but insurance and gas is cheaper ect ect.

I know i'll take some crap for this but the 2.5i was never meant to be anything but stock in my mind. If you where buying a impreza new in the last couple of years why where you a cheap ass and not buy the wrx? Yeah i know there is a large number of guys on here that drive them but it just does not make sense if you want sporty car to buy a n/a impreza. Keep in mind i have a 98rs and LGT...
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Old 08-27-2008, 05:11 PM   #11
KaptainKandy
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Quote:
Originally Posted by Subaruski420 View Post
2004 impreza is new enough in my mind that if i wanted a turbo impreza i would sell it and buy a wrx. Yeah some people are gonna say but insurance and gas is cheaper ect ect.

I know i'll take some crap for this but the 2.5i was never meant to be anything but stock in my mind. If you where buying a impreza new in the last couple of years why where you a cheap ass and not buy the wrx? Yeah i know there is a large number of guys on here that drive them but it just does not make sense if you want sporty car to buy a n/a impreza. Keep in mind i have a 98rs and LGT...
I would hardly say that a 2.5i should remain stock if an owner is willing to realize what the car is and what it isn't. To turbo 2.5i is often thought of as a quick fix to feed more power and to compensate for not being a WRX. This is probably not the best solution. Done properly it will likely cost alot of money and may reduce engine life.

What I encourage the OP to do is consider what it is he/she wants out of the car.

To be dismissive and say the car should remain stock however is silly. With the new i-AVCS on the 2.5i platform it is possible to make some decent power if built up. Will it blow away WRXs in the 1/4 mile? Probably not. But I have seen a fair share of N/A builds that do more than hold their own and I believe the 2.5i is next in line for this sort of thing.

In the end, I sugguest working on upgrading your brake system and suspension first. Two areas that are crucial should you choose to stay N/A or go boosted. Research, calculate and make your call.

Another extreme example is SubieSport's Zero to Hero 2.5rs. If I recall correctly it was an 04-05 model as it had the blob eye headlights. Alot of $ was spent to get it up to snuff but in the end it beat out a stock STi around a track. Set up correctly the N/A Impreza can be pretty potent...just a question of how deep your pockets are and tech know how.

Last edited by KaptainKandy; 08-27-2008 at 05:18 PM.
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Old 08-28-2008, 02:11 AM   #12
front runner
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This is as boring as the honda stuff....Swap this and that...for a JDM this and that... The only thing that brings me back here are a few guys actually blow their motors, rebuild and make something better. And a wrx swap will net you 180 whp??? Sloooooooow.
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Old 08-30-2008, 04:56 AM   #13
Fail Wagon
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thats only in stock form for another few hundred dollars you can have 200whp with plenty of reliability rather than just a bolt on turbo kit
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Old 08-30-2008, 05:22 AM   #14
Jeff54
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Quote:
Originally Posted by Subaruski420 View Post
ask your parents to buy you a wrx...

seriously though it is a complete waste of time to turbo the n/a ej25
hey man, why dont you say something constructive instead of throwing some bull**** parents comment.

as for the OP. I'd suggest checking out RS25.com as its a forum more orientated to the ej251 and people are a lot more willing to help, and wont just tell you to buy a wrx

a good thread to check out is this one:
http://www.rs25.com/forums/showthrea...ghlight=brydon

there's really two ways to go about turboing the RS. you can low boost the stock block...5-6 psi is safe on stock internals. The easiest way to do this is the AVO kit from rallitek.com....it'll put you about par with wrx's.....for about 3500$

you can do the same thing by piecing together a kit yourself for a lot cheaper....about 1500-2000$.....

personally i dont like either of these routes....as once you've got your 5 psi you're kinda maxed out.....

the ej251 has two weak links. The internals and the engine management. Neither are designed to be boosted...the best thing to do IMO is to either rebuild the shortblock with sti internals(like the thread above) or just to swap shortblocks with an ej257 or ej255 shortblock. Then for engine management you can run the emanage ultimate, or standalone(go hydra, its not cheap, but its worth it)...

my first RS-T build cost under 3500$ with hydra, ej255 shortblock, mhi 18G, ewg, and all supporting mods/plumbing etc...and i was beating STis on the track all day long. For what its worth a USDM sti swap would have cost me twice that, if not more. The car was very reliable and never gave me any problems. Until failure...

the engine failed after 25,000 miles. This was completely my fault as i re-used a wristpin/piston that should have been replaced, i knew it was a risk re-using it but i went ahead and did it anyway lol.

with an RS-T build you will learn a lot more than you would with a engine swap(and a LOT more than trading up), and you will also get a lot more power for your dollar. That being said it is A LOT of work, be prepared to put 100 hours into the build....but for some people(not very many on this site it seems) that's the fun in the car hobby, working on your car, putting the wrench time in and making something you can be proud of .....

if you're looking for easy power trade in your car for a wrx, buy a nice little staged kit from one of the vendors here and be the same as everyone else at your local subaru meet....

.......flame away
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Old 08-30-2008, 05:41 AM   #15
reddevil
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And an Even BETTER QUESTION!!!

How much money do you have to spend? seriously. Cause thats all it comes down to when having a RELIABLE car, power or high power....
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Old 08-30-2008, 06:00 AM   #16
Jeff54
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Quote:
Originally Posted by reddevil View Post
And an Even BETTER QUESTION!!!

How much money do you have to spend? seriously. Cause thats all it comes down to when having a RELIABLE car, power or high power....
on top of that do you rely on the car as a DD? can you handle down time?

how comfortable are you working on your car? are you willing to put in the time and learn?

soooo many questions
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Old 09-01-2008, 10:27 AM   #17
2milehi
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Here is a link and photo for my build-up. I did some lurking and got good information here. I spend $600 on parts and did the install myself (welding included). Been running 6 psi boost & stock ECU for over two years and close to 30,000 miles. It is not ideal but runs good for what it is. To the OP, it is an involved add on, but it can be done. Looks for deals on used turbo stuff.

http://forums.nasioc.com/forums/showthread.php?t=824400

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