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Old 12-18-2013, 07:12 PM   #1
Itsawagon37
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so im almost ready to start my spring build on my ej205. my problem is the scale of work to be done. im not new when it comes to this so i know my basic replacement needs but what i dont know is how much the stock internals are capable of. could i get away with just a bigger turbo better flowing exaust injectors and a tune, maybe push 300whp? or should i drop new rods and pistons in first to be on the safer side with that goal?

in the long run my consideration was just simply drop in a sti engine and then add the turbo an tune. costs seem to be so close...

any help or suggestions that can keep costs down and be worth it?
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Old 12-18-2013, 07:46 PM   #2
25rsti
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How many miles are on your ej205? You can make 300whp with a stock 205. The problem lies with for how long. Also, another problem is if it's up there in mileage. It's already had a long life of regular driving, spirited, engine internals have been worn for xxxxxx amount of miles and then to bolt of parts and expect 300whp is asking a lot.

If you've already thought about the 257 (STi engine) route, it might be a better option. But you need to plan it out, weigh it all out, price points and then do it all again. Knowledge is power but the research is key. Also, where is this STi engine coming from? Used, new, if used how many miles, is it in good condition. Will you 'try' and use AVCS or just the longblock without AVCS?
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Old 12-18-2013, 09:12 PM   #3
Itsawagon37
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i have alot of miles right now. 135k and thats alot to just add a turbo and go expecting it to last. Which is why i thought of droping in rods and pistons. Redo seals and whatnot to keep costs low. If i go sti change over im looking at fly by wire conversion and any longblock with avcs is adding a grand to my price. Most used engines im finding are bdtween 50k and 65k mostly ebay for lower price. But even then im between 3k to 5k for just the engine. Add the other changeover items i hit 6 easy. Simple piston ring replacement im just over 3. And thats my delemia. Build for 300 or just buy it and go.
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Old 12-18-2013, 09:59 PM   #4
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Do like Russel Peters'..... "Just take it and go!!"....
I know your were stuck on ebay looking at the all those v7,v8,& v9 jdm ej207 crate engines. They Are tempting, i was doing that myself and thats the route i plan to go if and when my motor goes.

Read up on the many ej207 threads on this board. With those, 300 whp is easily attainable.
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Old 12-18-2013, 10:18 PM   #5
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If you just want an easy 300. Swap an STi longblock (only). Re-use your intake manifold, fuel rails, lines, injectors (which should be upgraded) Cam gears, throttle body, etc...

The modifications you will have to do to make this work is you would need an after market cam position sensor relocation bracket. There are a couple companies that make them.

You need to plug the camshaft oil holes and you're good to go. Or you could upgrade cams using aftermarket wrx cams and not have to plug holes, which also opens up a whole other world of things.
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Old 12-18-2013, 11:51 PM   #6
mod maniac
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Rebuild with good parts, 300whp no problem. Ej207 300whp no problem. Stroker build 300whp no problem. Hybrid 300whp no problem. 300whp is easy. Do some research and decide how you want to do it. I like the stroker or the ej207.
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Old 12-19-2013, 04:04 AM   #7
Itsawagon37
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I believe my easrlier research involved a stroker, I guess its back to the old drawing board. I just have a hard time finding genuine information and parts. I can find the cheap knock offs and the like, I also seem to find the sites with the completely useless information. 25rtsi, you have some great ideas that I was unaware of.
now here may be a tough question, but a friend of mine has a 91 Legacy block. I believe it was a 1.8L engine. He seems to think I can use that block with my heads, which would give me a block to start off with rebuilding.
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Old 12-19-2013, 05:39 AM   #8
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or you could bore it out to th 257 size and stroke it. between the ej207 and 22 there is not much difference. if you were to use the long blocks as others have said, make sure you do something about your compression, it may be getting a little too high. also 135 for these motors is not that high and the only things you might want to look at replacing is the mains and big end bearings
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Old 12-19-2013, 08:41 AM   #9
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I'd consider doing a 2.1 stroker if I still had my 2002 WRX. Dom at Maxwell Power Services offers a shortblock that uses a EJ257 crank and +2mm rods. I'd give him a shout.

FYI I put a Blouch 18G on my WRX when it was around 90k and made 310whp. Sold it to a friend and last I heard still running strong at 130k.
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Old 12-19-2013, 11:19 AM   #10
Honest Bob
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X2 an 18g on a 205 will make a good 300+whp. I'm at 140k and have been making 320+ since 70k. A little maintenance goes a long way.
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Old 12-19-2013, 03:10 PM   #11
Itsawagon37
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thats the turbo im getting as i live 40min from the blouch shop. So just replacing bearings the 205 will hold? That seems a bit risky not knowing my engines history prior to 106k If im going that far id also replace rods and pistons just to play it safe.

Last edited by Itsawagon37; 12-19-2013 at 03:15 PM.
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Old 12-20-2013, 12:32 PM   #12
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Good oil and keeping that oil topped off religiouslywith a good tune and you'll be good. I dont really see a need to open up a good running 205 just for 300 hp. Maybe have a compression test done if your really that worried.

Building 205's isnt really cost effective when you can build a 2.5 or buy a 207 for not much more and have alot more potential.
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Old 12-20-2013, 02:26 PM   #13
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Quote:
Originally Posted by Honest Bob View Post

Building 205's isnt really cost effective when you can build a 2.5 or buy a 207 for not much more and have alot more potential.
+2

easiest and most cost effective is to sell your stuff and get a V8 engine/ecu/turbo for about 3500 shipped from a vendor on here. Easy to wire up and you get AVCS and just about everything you need minus exhaust and tune for 300whp.
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Old 12-28-2013, 06:01 PM   #14
Itsawagon37
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ive decided im going the swap route. Now doing my research on what all i need to make it a easy swap. Im droping tge bigger turbo at the start. Whats a good base injector to use? 750 850 or 1k? Just looking for a stg 1 or stg 2 configuration after the swap
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