Subaru engine comparison, FA20, EJ20, EJ25,STi, WRX 

my f20 rod knocked bone stock no mods toyota didnt want to help me and wanted 10k$ 32k miles on the motor.. sued the fuckers now i have a sti :)

Great video... You could do something similar on turbos. Subaru have used td04, vf22, vf28....

Great insight into these Subaru engines. Glad the brz can handle power. Great expertise

Run an AOS / get an equal length header (i know no more rumble)/ get it tuned according to the mods you got/ service regularly with premium synthetic oils..you'll be suprised by the ej257's efficiency & reliability 😎

This was very informative for me thanks for going into these details.

This video was fantastic. I am saving up for an FA20DIT rebuild and have been trying to learn more about the Subaru engines in general. This was exactly what I was looking for.

Not discussed was the major difference when going from a 2L, in the crankshafts, rods and pistons, but should that be obvious? All newer 2L/2.5L cranks/blocks are directly interchangeable, but the stroke is different. Main & rod bearings on recent turbo EJ20 and EJ25 are identical. If you mix older stuff you will run into issues with the thrust bearing being on main #3 instead of #5. They can be machined to switch to #5.

Really appreciate the technical information and example engines you set aside to demonstrate to us. I'm pretty much just a beginner when it comes to motors, but thanks to channels like yours I'm understanding and expanding my mechanical knowledge. Fantastic to get ideas and know what is possible from experts like yourselves. My EJ20 is currently undergoing an engine rebuild here in Auckland NZ, and I'm learning heaps in the process. I have been documenting the progress in a special video series called "Project WRX" on our RU-vid channel called diecasttvchannel (aka DCTV). We've subscribed to your channel and look forward to watching many more of your awesome videos. Thanks mate.

should do a video on the differences of the ej22e, ej222, ej22t, and ej22g

All those engines and my 2001 Legacy outback in the carport needing one...✌️😢👍

Fantastic information.but I have a question . I have a 2003 Subaru Forester X 2.5L MT (EJ251) Can I swap the engine EJ251 to 2014 or 2015 upper ?

My 2013 Scion FRS had a recall on FA20 with Valve Springs that crack and timing breaks! What I wanna know is, what i can replace it with that is a direct bolt on? EJ20 or FA20 out of the 2017 Toyota 86 GT?

Love your videos! Very informative! Keep them coming especially the FA20 updates and info!

2015, FA20 WRX here! I hope it holds up!

"the heads have had a birthday" hahahahahaha never heard anybody say that about new parts!!

Excellent video sir! Thanks for all the info - really helped to clarify the differences in motors and applications. I do have one question on the EJ207 and ‘257 (STI’s) though - Q: Are the blocks on the STI motors actually stamped “EJ207” and “EJ257” or will they still just be stamped “EJ20” and “EJ25” and then differentiated by additional stamping/coding to identify whether/not for STI application?

Wow! Great video-thanks. Good to know that my brand new 17 STI has hypereutectic pistons.

v7 ej207 vs v8 ej207 ? ej207 is stronger to my understanding ?

One question regarding the ej20, the wrx block it self is the same as the sti one? Only the inside is different? So it would be possible to just put in the internal if the sti ej207 and i would have all the same advantages? Greeting from Europe

So Ej207 with a modern twin scroll turbo is the way to go?

t's your personal favorite engine betwin 2.0 and 2.5 liter (years 2000-2009) thank you so much :0)

Great video! Great to hear from a Subaru expert on the various engines and there differences.

He's like my well informed Subaru 'Aussie' uncle. 😄

Very informative, thank you.

Not sure if people are still active in these comment sections. I have a scion FRS and I am looking to swap an EJ motor from a salvaged WRX or WRX STI. Im looking for an EJ motor that has forged internals from the factory. Which engine should I be looking for and which Subi does it come out of? Doesn't matter if its 2.0 or 2.5 liter. I would appreciate the info thank you!

Hey I have a 2008 Subaru Impreza wrx 2.5 turbocharged with an engine EJ25 and I bought a new engine but this one is JE20 almost everything is the same from the old one but have 3 hoses i think is for the coolant but for the old engine only has 2 on the engine so my question is the engine gonna fit on my old engine?

So basically the FA20 is the better engine over the EJ25, I was gonna get a 2015 wrx but I'll probably just buy a 2016 or 2017 model to get the newer engine.

Can you do a rundown of all the 6 cylinder engines like you are doing on the 4s?

So what of those engine is the best engine for a impreza that i can built and stay strong. All the letters and numbers gets me all confuse. I have my eyes on a 2005 rs impreza, obviously i want a better engine to run. When i mean to run is race another car. I knew that to get more hp i have to upgrade internals and everything. I heard something about hybrid but dont know what that is.

I had an ej20x swapped in my legacy can you tell me what it is?

From the us doing a RHD swap on a outback legacy with a twin scroll 2.0 not forged unfortunately

Can you give dimensions of the FA 20? (Length/height/width)?

have a subaru legacy ej 20 with have new plugs and the spark plugs and the coils and still miss

very informative cool thanks man

hey, im a big fan from brasil, I watch all your videos. I have an ej207 that spun bearing and had a cilinder scraped by the piston, with some axyal spacing on the crank... and my friend has a ej204 that is disassembled and ready to sell. is it possible to assemble this ej204 block with ej204 crank, ej207 pistons, rods, heads and eletronics? (i have a spare piston to replace but a ej207 block is too expensive here in brasil) regards and thanks for sharing so much valuable infos on subaru engines!!

I’ve just bought a ‘05/‘06 Liberty GTb tuned bySTI which I’m assuming is the twin turbo EJ20t? Is it possible to swap it for a ej207 straight out of an actual STI? Does anything else need to be changed? Due to physical constraints I had to buy auto, would the gearbox be able to support the extra load? Is there anything that could be improved with the gearbox? TCU tune? I LOVE the size and shape of the gen4 Lib wagon but I’m coming from a Golf R wagon and could always use MOAR. I’m in AUS so would have to get you guys MRT to look at it, I just wanted to ask first so as not to waste time for either of us. Cheers!

If you have an ej205 in an impreza rs 05, are you able to swap to a ej207 direct?

Hi.. I bought a Subaru ej20 (written on engine body) imported engine (so I have no vin).. I was told by the seller that it came from Australia and probably MY 00-07.. the motor number is 730128 and has 4 valves per cylinder... is there anyway I can know more information on this engine trim and specs.. I searched a lot online and I’m can’t be sure what exactly is it.. any pointers will be very useful..

Seems the EJ257 is mainly made to cater to the US market which has shitty gas vs. Japan and other parts of the world. This explains why JDM Impreza STI always exclusively employed the EJ207 but thanks to a twin-scroll turbo, significantly higher redline (the forged pistons?) makes equal hp to the larger EJ257 but in a smaller package. The EJ257 makes better torque which Americans seem to want in cars which is likely why it continues to be employed after all these years. However knowing this I wonder how Subaru will go from here, as separate castings & engine sizes are going to be costly for the small company. Given the new Ascent announced the FA24, would the USDM & EU market get a FA24 powered STI while JDM switches over to a high-tune FA20, or all future STI would use one single engine size?

At the 5:00 mark you talk about the FA series "being a worthwhile engine from a performance point of view". That was in 2016, do you feel the same way about them now, 5 years later? Also, I've read that the FA series uses the same piston make up that the EJ series did, which made them brittle. Are the FA series pistons also brittle like the EJ series or are they stronger than the EJ series?

What type of turbo kit would you suggest for a 2016 subaru liberty 2.5 premium? i dont intend to race or anything like that. Just looking for something that will spool up quickly for better performance from low RPM. The CVT seems to be flat until it hits the 3500-4000rpm range. I have read in the US Subaru released a Legacy 2.5 B4 Turbo.

Is the liberty ej20t and s-gt ej20t has the same engine or there is difference?

I recently bought a 2010 Subaru Forester (non turbo) which I bought knowing it's an STI. It has the STI badge at the back. The Engine is EJ204. Is it possible that it's actually an STI engine? Am not very good in knowing the differences. If anybody could help I would appreciate. Thank you!

So would a ej20y be a good swap for ej255?

So is the fa20 forged?

Bought a used '10 STI with a rod knock engine that turned to have a 2.0L 207 engine in instead of 2.5L 257 usdm that it supposed to have and now I don't know if that's a bad thing or a good thing

I'm kinda new to the ej25 motor. I have a 01 impreza rs2.5. Nothing extra just stock, do sti come in ej25 engines too or only ej20?

i guess im screwed coz i got the 2016 sti. it sucks paying all that money and have a weak motor. whats your advice? maybe trading it in?

I'm so glad I found your channel. This is incredibly informative!! Thanks :)

Great video, I have 2x ej25 blocks one from an 08 sti, one from an 08 wrx (non sti) the casting stamps is 703 they look identical. Looking to use one in my bug eye. Are these identical blocks? Pistons rod crank? Or does the sti version have any stronger internals?

Are there cast iron blocks for subarus to mate to an aluminum head

could you do a video on what JDM engines can be swapped into certain USDM models specifically the bugeye?

just to clarify a 1999 subaru outback engine would be dohc and would need new heads before you would even consider adding a turbo to it?

Can the ej20 and the ej255 use the same clutch kit system??

And my question is seen I have a fa20 boxer engine is where would I look for heads for that engine

Que motor es mejor? Ej o Fa. Saludos desde chile

I just bought a 99 Forester S with the EJ25. Has 110,000 miles on it. It sounds pretty good and your video was very helpful. I dont know much about these engines. I live in Amaerica and I like my V8s lol. Is there anything I should really worry about these engines or are they pretty reliable?

life time warranty? do you ship to the USA? lol

Very interesting show in my 2019 Toyota 86 I have a fa20 which is the newest boxer engine

Thanks you. Informative vid. I am in the market for a turbo SUV and looking at Santa Fe or Sorento. Do you deal with these models? Maybe you can shed some light on reliability of common rail fuel systems, fuel choices (reliable suppliers) and DPF filters. I am reluctant to spend a lot of money on cars with diesels that may be fragile.

Hello brothers, i has question : you can put turbo a naturally aspirated engine uj255?

So can a older engine still have a birthday? Or are they too confused? Oh wait that's me getting technical

wow awesome video, very informative

will a 2005 ej20 wrx sti engine go straight into a version 1 wrx with little having to be changed?

i have a legacy 2005 gt 2.5L turbo so the ej25 and the engine went out at 150k miles ive had that car for 10 years , i bought a jdm 2.0L turbo engine and its getting installed i hope the engine works good and it lasts , i was told by the shop thats doing my swap that the ej20 will be a direct bolt on to my ej25, is that true ?> i wanted to get your opinion . also the 2.0L engine i bought its jdm and i have an american ecu is that going to cause anything to go bad i was told by the shop no and that the car will run the same as the 2.5 , was wondering what your thoughts are

It's possible replace an ej20 to fa20? Only the block

Which gearbox properly suits ej25 Subaru forester?

How much u guys pay for cores ej25 short blocks got 10 units

So can I put all the parts from EJ257 to my EJ205 built shortblock ?

Is the block to bell housing bolts pattern same on fb20d an fI20?

What did the owner do to bring in an FA20 engine into the shop so quickly?

Hi mate. Id love to see a video on differences between the different ej20 blocks. Have bought a TT legacy as an engine donor for my beetle- its an ej20h but no idea how that compares to similar years wrx motors etx

Aussies get the best subie options. Quite envious

I love FA's. I love ej's too. I just love subies.

North of 16k on my 2015 STI build at the moment. 675bhp

I have an EJ20 in my forester 06 model. Can I put an EJ25 in it without any trouble? I have a Hyundai computer which caused that horrible hesitation with that model. Its been sorted but it still doesn't run quite right.

Was thinking of getting an 08 Sti.. Is the fa20 a better bet in the g4 wrx?

what are the best turbos to use for the 4 door sti engines the ej20 with 207 block

Honda engines are better than Subaru.

Any heads up for 2013 WRX common problems?

What does the new Forester XT have and how reliable is it? I had a turbo fail on my Audi A4 thus I am hesitating on getting another turbo charged vehicle. I know Subaru engine tend to use up oil, does that include the XT?

IYO, has Subbie fixed their famous ''blown head gaskets'' issues with their newer models, say 2016 onwards ? Thanks for the great video.

How do you get these engines so clean ! Look how big that engine in the back is..looks really wide.

Boy that FA engine looks weak weak weak

Which its the best and easy engine swap for a 2003 aubaru legacy wagon L?

What is the largest twin scroll you can put on the ej207? I saw the vf37 but are there other aftermarket replacements that are twin? Thanks!

Can I use v2 heads on a v5 block

Do you guys have any video on what stuff you use for your rebuilds? or a rebuild video? Ive heard the head gasket and cylinder head bolts needs to be of specific brands or Subaru themselves.

Thanks Brett for the insights on Subaru engines. I'm currently working on a STI conversion of my MY99 Impreza GT including the complete drivetrain with 6-speed gearbox and DCCD. I wasn't sure if the EJ207 always came with forged pistons or just specific model years. So thanks for clearing that up for me.

Is it me, or that fa20 is wayyy longer than the others?

hi are all the 2.0l engines have forged rods and pistons please?

Dyno to come... looking at 500+ awhp 500+ awtq on e85

great info!

Have you had or dismissed the idea of a front mounted turbo setup on an EJ engine in a GC8? Would you advice against such a configuration?

Hello I have a big question I'm rebuilding my ej25 from my impreza 2.5i to turbo it am getting all forge rod pistons everything top off the line you think is a waist of money that the turbo is not gonna work on that engine please let me know I will appreciate

@2:39 - would that be considered semi open or open deck? Only supported at the ends. Obviously low compression.

Subaru motors for me are the best

I got a EJ20 in my subie pretty stock atm

This guy is a walking encyclopaedia on Subaru's

Does the EJ207 in 99 WRX type RA also have forged Pistons like the STi?