even the largest stock turbo doesn't help much. it's still pretty small. VF22, i think it is? i had one on my '05 WRX along with EL headers, CAI, intake tube, up pipe, divorced 1.5 scroll downpipe, injectors, boost controller blah blah. basically everything imaginable short of a built engine. i made a whopping 280whp or something like that LOL. better than what it made on the stock turbo, though.
i bought my second Evo shortly after.
at least the Sti is 2.5L. not that it helps much. the torque from stop light to stop light is probably why everyone things they are so fast.

 

EJs have horrible transient response due to the packaging compromises listed above. The world isn't a dragstrip, though, and the new STI drives fantastic. If/when it gets the DI motor, I'd consider one as a DD. I think it will fix the only glaring problem left.

 

I'd like to see direct comparisons. So far AMS is the only shop I know of that did that.

 

I own both an Evo X MR and the new STi and I absolutely love the new STi as a daily.
Pleasure to drive, balanced and rigid. The stock suspension is perfect, no need to change it.
Some points on the EJ25 a lot of people are commenting on.

Yes it is well into its aged life cycle but here are some points:

-From a manufacturing point of view. A long life cycle is a good thing, it means suppliers and engineers have loads of time and trials and errors to learn from to make it better and more reliable. As a consumer or mechanic you might not see or notice differences in parts but at the engineering and manufacturing level, there are so many iterations and change levels that improve where there are weaknesses.

-The EJ25 in a 2015+ STI will be a diamond in a rough, there was a period where the bug eye WRX got a 2.5 version which is considered pretty rare and highly sought after for. I believe this will be one of those situations as well.

-From a driving experience point of view, the 2.5 litre has a characteristic to it that new motor tends to wash away.

-Loads and loads of aftermarket parts, most that cross over from 2011+ (which is nice).

Anyway... thats just one take from this guys daily driving both cars. Dont get me wrong, my X is amazing and I would still choose it over the STI IF I had to make the choice. But I dont so.

 

Man, I gave it a good search, but can only find 4B11 vs. EJ257 stuff or 4G63 cars not on a level playing field.

IX vs STI stuff is almost 10 years old and hosted image links are all broken and purged now.

Best bet is a shop sees this and pulls archived dyno data by layering raw run files.

 

I thought only the UK bugeye got the 2.5 liter, maybe. The only bugeyes I've seen had 2.0 liters, including JDM models.

I've heard more reports of ringland issues in newer STIs but that could be a reporting bias.

 

It's hard to find an unbiased source. There's a local tuner that does great Subaru work, but his experience with Evos is much more limited so it wouldn't be fair. That's true for a lot of Evo tuners. I would genuinely be amazed if 4G63 Evos could regularly and consistently make 50 whp over EJ equipped STIs.

 

Reason why mainly, because its a well known fact and its over talked about 10 years ago. lol
If you that desperate, try to looking up EU sources, they deal with them a lot longer.
In a real world, hardly have two cars on a same level, at a same time, same place, etc. but even then, same type and level cars usually pull different numbers.
That doesnt change the well known fact. Evos do make more power, and their engines are more reilable. I dont know about 50hp or any spec number.
I am not really a hp chaser, i am more of the reilable engine guy. Hence why i picked the Evo. And years of racing in a field which is loaded in the states with Subarus, i made a good decision. My evo is lot more reilable and cheaper to race vs my class subarus. It was not as clear in EU because there are a lot more evo runs, and lot less subaru. Here in the North American race field, thanks to Subaru USA etc, the Subarus geta a lots of help, therefor majority of cars are subarus. So the engine reliability etc a lot more obvious here.

 

Well Subaru just had their best US sales month ever for wrx/sti, so they must be doing something right.
http://www.torquenews.com/1084/hot-s...listering-pace

 

From the mid 00's it was very popular that STi's would make 300whp/350wtq with all the bolt on's in the world.
When the later generations were coming out like 06-07 models like 325-335whp/360-380wtq with all the bolt on and running the stock turbo's etc.
I lived it, pre, during, post.... take my word for it, this is generally, typical numbers to expect from the subie world. So its very true that the torque surpassed Evo's because almost no body back then was running E85.
Now, tuning part per part, Evo's made more power, fact. Subaru's absolutely needed a full IC and piping setup or the timing was ****ty... and they always got Check Engine lights from cats or over boost issues etc.

I think many who drove in these Sti's felt like they were faster in the stop light challenge, that second gear hit SOOOOOO hard and Evo's were extremely new to the community coming out in 03'.
Subie's caught on because of the WRX and AWD. People wanted traction, Turbo honda's (still very rare for the time) and SRT-4's were not cutting it so everyone turned to Subaru's to get out of these vehicles. This is EXACTLY why as mentioned the late "Honda Ricers" of the 00's seemed to be in Subaru's... its because they transitioned. Up through the late 00's they became very affordable and everyone EVERYONE wanted the turbo noises

I would say ~2006-2008 people could actually afford and tune used STi's and Evo's and the communities really started to grow... and now almost 15 years later anyone can afford these cars and the community is falling.

 

No bugeye WRX had the EJ255 in the USA. The first year of the WRX in the USA was 2002 and it used the EJ205 from 2002-2005.

The Forester XT and Baja XT where the first to get the EJ255 in the USA, starting in 2004.

The first year of the EJ255 motor in the WRX was 2006.

First year of the EJ257 in the USA was 2004 in the STi and it continues to use the EJ257 in 2016.

 

Except they haven't improved it. 2011-2014 the ej still had massive ringliand and rod bearing problems. And I've heard more than a few people with 2015's already needing new engines as well.


I'll give the FA20 a few years to prove itself, and then a I may consider and STI as a daily..

 

You're right I always get bug eye and the one after that mixed up. I grew up with Mitsu's, never really payed attention to the subies :P

 

At this point, it is probably a good idea to wait for the next generation wrx/sti. Subaru will hopefully up its game in response to the Focus RS.

 

The WRX generation after the bug eye (04-05) didn't have the 2.5 either.

It wasn't until the 2006+ hawk eye generation.