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Discussion Starter · #1 ·
hi im new!

i just picked up a 1998 legacy outback 2.5 which as far as i know is the ej25d that came in the 2.5rs , so im considering going turbo and have heard that sti head,rods,pistons are the way to go, but i was wondering would i be able to run a turbo setup on a piggy back ecu with my stock maf??? also do you guys have any link or vids of RSs with the same setup im considering? any help is appreciated so thanks in advance

also im over on tristatetuners so hit me up if your over there
 

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project blackbird.
'01 RS, '81 Fiat Spider
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I think Outbacks are sweet, but I have no idea how to answer any of your questions!

I do know there are plenty of swapped Outbacks out there if you are going the turbo route, so you may find that to be an easier and more reliable solution than a rebuilt engine with an aftermarket turbo kit. A very good friend of mine had an EJ20 swap in his.

You may also want to check out LegacyGT.com. They have plenty of love for all things Leggy over there.

Most importantly of all, get your post count up and show us some pics!
 

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Discussion Starter · #4 ·
thanks, im trying to stay affordable here so swap is in no way my option, im looking to do a home built turbo kit with mostly used but in good condition parts, i will most likely just get all the parts together and ready and then pull the engine and do everything in one weekend hopefully, but this is my daily driver so i dont wanna go with a huge turbo or even boost it over 15 PSI , im just looking to step up the power a bit, thats also iwhy i wanna stick with a piggyback ecu so i dont have to get into all the wiring of a standalone

BTW: im rejistered on sl-i.net wich is better than legacygt for me atleast because its an outback and not a turbo model
 

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it woudkl be cool but the outback is really heavy, something u may wanan consider
 

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98 2.5RS ~ EJ257D Hybrid
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To do a turbo right you're going to spend close to what an wrecked wrx is going to cost and from what I've learned the Ej25D is a PITA to turbo

I mean it can be done on a budget but it will be unreliable and limited on power
 

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Discussion Starter · #7 ·
from what ive been reading on here the you rs guys arnt having big problems, and they are the same motor arnt they, with the exception of the newer ones being SOHC instead of DOHC like my engine
 

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project blackbird.
'01 RS, '81 Fiat Spider
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DOHC motors tend to blow headgaskets with even greater frequency than the SOHC ones, which have had plenty of issues with that in their own right. In the long run, a reliable swap is probably your best option. It will make plenty of reliable power over a period of many years and will be easy to maintain with readily available parts.

Of course, this is conventional wisdom. By all means, do what you want to do above all else. There are guys on here running N/A or with homebrew superchargers. There are spare parts turbo kits, aftermarket turbo kits like Forced Air Technologies and AVO, and there are all kinds of crazy Frankenstein swaps with EJ20's, EJ22's and EJ25's. There are even a couple H6 swaps floating around. If your goal is to be creative, then by all means turbo your EJ25D. But if cost is your concern, the small amount of cash you save in going with a homemade kit is more than likely going to be spent in maintaining (or replacing) the finished product.
 

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Wedges' Biggest Fan!
2000, subaru, 2.5 rs impreza,
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DOHC motors tend to blow headgaskets with even greater frequency than the SOHC ones, which have had plenty of issues with that in their own right. In the long run, a reliable swap is probably your best option. It will make plenty of reliable power over a period of many years and will be easy to maintain with readily available parts.

Of course, this is conventional wisdom. By all means, do what you want to do above all else. There are guys on here running N/A or with homebrew superchargers. There are spare parts turbo kits, aftermarket turbo kits like Forced Air Technologies and AVO, and there are all kinds of crazy Frankenstein swaps with EJ20's, EJ22's and EJ25's. There are even a couple H6 swaps floating around. If your goal is to be creative, then by all means turbo your EJ25D. But if cost is your concern, the small amount of cash you save in going with a homemade kit is more than likely going to be spent in maintaining (or replacing) the finished product.

I agree.

From my own reasearch this is what I have found out about what you are wanting to do. Hell, I am in the same boat right now. Started ordering parts last week.

Now about your question with the piggyback. I have heard of people running the E-manage ultimate and having great results...until they want more boost. The problem with a piggy back is that It can only tune so much. There are limitations on how it controls the injectors. Standalones just offer so much more. yes they are more exspensive, but while your doing it why not take that extra steup and KNOW your engine will be safe.

I am also going to be running STi rods and pistons. & STi Turbo with a Hydra EM. Elementtunning.com has an awsome site set up for the Hydra. I would advise looking there to get a better understanding of the Hydra. They are great people if you have questions on your perticular set up you could just give them a call.

Hope this helps. Good Luck with the build!

-Doug
 

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skullys setup is a big turbo ej205 hybrid. the only thing special about it is hes using an ej25d block..hes running standalone + ej205 ported heads. bit diff then ej25d stuff id say
 

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Discussion Starter · #12 ·
well i am going to run sti heads, crank, rods, pistons along with intake manifold, and im considering hydra engine managent nw, so the only difference will be i wont have cams or a huge turbo
 
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