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Old 02-07-2006, 02:07 AM   #1
Swansea_lad
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Default sti or mod WRX for my 99RS

ok So i am about to buy a 99RS 2.5L 2door.(rated at 165hp)
i was orgianlly goin to swap in a newer WRX EJ20 stock engine (227hp).
Im now thinking to go the whole way and want to know my options of putting in the STI engine in.
What are teh STI engine codes? the sticky thread says 2004 STI engine is EJ205T. is this the only sti engine?
also what about just getting teh EJ20 WRX engine...then is it possible/easy to swap in the STI injectors/intercoolers/turbo etc or is this not worth it.
how much are the STI components to buy individually compared to jsut getting teh STI engine?
Thanks
p.s. i would liek to avoid JDM just because i dont want to mess around with that. plus im not crazy crazy at getting it all fast. 300bhp is good to me. (even tho this will move!)

also...are there any sites(havnt found any really, yet) of places online where I can order suby engines.
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Old 02-07-2006, 06:37 AM   #2
swapstar
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yes. messing around with all of that.
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Old 02-07-2006, 08:14 AM   #3
subbyspeed
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2.5l STi- ej257

I did the usdm wrx swap in mine, and i love it. With some bolt ons/engine management, it'll be plenty quick for my liking. I also stuck with the stock RS gearbox and rear diff (4.11). It makes a big difference over the uber long wrx gear ratios.
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Old 02-07-2006, 08:53 AM   #4
the_short_bus
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so you like your USDM wrx swap? i'm about to do that within 2 weeks. did you ever own/drive a wrx prior for a long period of time. just curious the difference between the two with the same engine but different gearboxes?


tsb
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Old 02-07-2006, 11:20 AM   #5
Matt Monson
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If 300bhp will content you, do the USDM Ej205 swap. Then, get a catless up-pipe, a TBE, and a VF30 or VF34 and some STi pinks. The turbo and injector change is making the set up very close to a JDM EJ207 2.0l set up. You won't have the advantage of the stronger block or better heads, but with a Cobb stage 2.5 reflash, you will be at 310-315chp.

And do stick with the stock tranny. The gearing is far superior to a USDM WRX's gearing. I have driven a lot of these cars. If the $$$ aren't their for a full blown RA tranny, the RS tranny is the next best option gearing-wise...
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Old 02-07-2006, 12:06 PM   #6
the_short_bus
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ok thanks... I almost forgot about the catted uppipe. i'll have to gut the extra one i have here before the swap..


Quote:
Originally Posted by Matt Monson
If 300bhp will content you, do the USDM Ej205 swap. Then, get a catless up-pipe, a TBE, and a VF30 or VF34 and some STi pinks. The turbo and injector change is making the set up very close to a JDM EJ207 2.0l set up. You won't have the advantage of the stronger block or better heads, but with a Cobb stage 2.5 reflash, you will be at 310-315chp.

And do stick with the stock tranny. The gearing is far superior to a USDM WRX's gearing. I have driven a lot of these cars. If the $$$ aren't their for a full blown RA tranny, the RS tranny is the next best option gearing-wise...
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Old 02-07-2006, 12:32 PM   #7
subbyspeed
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Quote:
Originally Posted by ProjectBluBawls
so you like your USDM wrx swap? i'm about to do that within 2 weeks. did you ever own/drive a wrx prior for a long period of time. just curious the difference between the two with the same engine but different gearboxes?


tsb

Yeah, i love it.. And my goal wasn't max horsepower.. i wanted something i could build mildly, and still be reliable. I've got a stage 2 setup ready to go on the car, once i get it back from the body shop, and after that, i'll just upgrade injectors and turbo to a vf39, get a protune, and be done power-wise.

As far as gearing, i've driven a few wrx's.. Stock, and some well modded. Stock, the gears feel like they take forever. Well modded, still take forever, but now your going way too fast too quickly by the time you wrap it out. Unless you like top speed. I particularly don't.
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Old 02-07-2006, 12:51 PM   #8
the_short_bus
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yea my goal is to get back to a stage 2 engine, like i had in my 03 wagon. with the weight difference and better gears it will be alot faster. I don't plan on going anymore than stage 2. its quick enough and a good middle ground for autox and drag.


Quote:
Originally Posted by subbyspeed
Yeah, i love it.. And my goal wasn't max horsepower.. i wanted something i could build mildly, and still be reliable. I've got a stage 2 setup ready to go on the car, once i get it back from the body shop, and after that, i'll just upgrade injectors and turbo to a vf39, get a protune, and be done power-wise.

As far as gearing, i've driven a few wrx's.. Stock, and some well modded. Stock, the gears feel like they take forever. Well modded, still take forever, but now your going way too fast too quickly by the time you wrap it out. Unless you like top speed. I particularly don't.
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Old 05-10-2006, 10:37 PM   #9
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I am also trying to decide between EJ257 or EJ20T modified in a GM6.
As of right now it will probably see very few events but I am very passionate about my daily driving.
My immediate goal is 300hp but would also like the availability of even more ponies. An extra $3k now would be worth it if upgradeability goes way up. How much more time/money/headache is it to do the full STi swap. Is it really worth it? DCCD, 6 speed? Of course the more you increase HP beyond factory the OP, the more unreliable. But, I've also heard and read that Subaruís 25, even the 257 isn't their most durable block (particularly '04).
What if this is the scenario; $10K, daily driver (no drag racing), possibly modified later but no more than 400-450hp max. Thank you all for your $.02 so far.
--- Cory
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Old 05-11-2006, 10:42 AM   #10
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you won't get a wrecked sti for 10k
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Old 05-14-2006, 10:21 AM   #11
fourstrokephysics
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Yeah but the wrecked 03 WRX for my 97 OBS was only 5000...I used the dash, engine, transmission, rearend, brakes, hubs, axles, front control arms(+20mm wheelbase with no need the roll the fenders), seats, entire wiring harness (no harness splicing necessary if you do a dash swap too). The WRX already had a catless uppipe and downpipe and with the longer WRX gears in the lighter chassis, its a highway screamer. You have to use the WRX crossmember and the WRX front swaybar (or if you get an aftermarket sway bar, you'll need a 02+ sedan front swaybar, or an 02+wagon FSB if you don't do the transmission swap too. You'll gain a rear LSD by doing the tranny and rear end swap. Use the WRX front control arms if you use WRX sedan front axles (i guess this is if you're going to do a drivetrain swap too) but then you also get a set of 4 wheel disc brakes that are pretty damn good when you put them on a lighter car. Also you have to swap in the pedal box if you're going to go with the WRX tranny. Sure the 4.11 gear might be kinda quicker but that 3.90 gear isn't too bad either..I like it on long trips. An STi swap would be wicked fast but also wicked expensive and there are other issues to deal with such as the electronic throttle control. It requires fabricating a bracket to hold your gas pedal. Other than that the swaps are very similar other than the price issue. 10K is not unreasonable for an STi swap. I did my WRX swap for 5K and I outrun 350Zs all day long. Also that was in a 4 door OBS wagon, I can only imagine what the two door coupe is like. It's all up to your budget i guess.
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Old 05-22-2006, 08:58 PM   #12
PinkRabbit
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Ok, what if we assume that it is possible to acquire an STi for 10k or just take the monetary amount out of the equation. What will serve you better; EJ257 or modified 20T?? Input is ggreatly appreciated.
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Old 05-22-2006, 10:02 PM   #13
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If you can handle the swap, why not go jdm? If emissions doesn't come into play than it costs the same or less than the wrx swap without have to upgrade much for the 300 hp range.
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Old 05-22-2006, 10:02 PM   #14
subbyspeed
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Quote:
Originally Posted by PinkRabbit
Ok, what if we assume that it is possible to acquire an STi for 10k or just take the monetary amount out of the equation. What will serve you better; EJ257 or modified 20T?? Input is ggreatly appreciated.

If i could have the 2.5 liter, i would. The torque is significant. But the ej205 is a good way to go for reliable power and plenty of readily available parts for it. And is cheaper than the 2.5 swap. The 2.5 will handle more stock though.
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Old 05-23-2006, 07:54 PM   #15
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Quote:
Originally Posted by Jaxx
you won't get a wrecked sti for 10k
I would agree with this statment. I just purchased my entire STI swap and I swearched around for a month or two for salvaged/wrecked sti's and I couldnt really find anything lower than 12-13k. I had people telling me you can get them at auctions for 9k..etc. Ive never seen it for that low though. I got the engine, ecu, engine harness, bulkhead harness /w sti cluster, sti 6 speed, and entire driveline for 10.5.
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Old 05-23-2006, 07:56 PM   #16
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Quote:
Originally Posted by PinkRabbit
Ok, what if we assume that it is possible to acquire an STi for 10k or just take the monetary amount out of the equation. What will serve you better; EJ257 or modified 20T?? Input is ggreatly appreciated.
I have a ej205t in my GC8 right now. I had a choice to put 11k into it, or buy a full sti conversion. It wasnt a hard decision for me at all, I opted for the STi conversion without much convincing because I know the potential of the engine. (ej205 mated to the rs tranny and driveline..etc)
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