I could listen to this man talk engines all day

@jimothy138

2 ай бұрын

educated and concise with full factual explanations that are easy to understand even for a layman, hard to find on youtube.

Definitely want to see FA20 vs FA24

@motoiq

3 ай бұрын

There isnt much difference, mostly bore size and minor difference to how oil drains to the pan.

@stronkwurks8769

3 ай бұрын

@@motoiq Is it not true that the fa24 has notably thicker rods and cylinder walls than the fa20? I really appreciate your content. Oh, I just saw the part where you said you hadn't gotten one in yet.

@isiprojects8084

3 ай бұрын

@motoiq I thought the beehive valve springs were better? Rods a little bigger? Seems like doing the Tomei gears for the oil pump is wise regardless on an FA2X?

@motoiq

3 ай бұрын

The 24 is about the same, maybe the rods are a little stronger, the bore is bigger, the engine on the stand is a FA24. It's not like the FA20 rods are weak, I think the FA can make the boost at low RPM and stresses them out. They don't bend until higher power levels are reached, like 350 lb/ft of torque, over 400 hp, a good tuner can manage your boost to keep you in the safe zone.

@isiprojects8084

3 ай бұрын

@motoiq I much appreciate your help and responses. To confirm, this all applies to the DIT version of FA24 as well?

I wanna say that, for me, this is the perfect level of detail. Not way over my head, not too dumbed down. "Accessible", I think they call it. I have a FB and its *still* entertaining.

The BEST engine discussion I've seen. Not boring for one second, this presenter really knows his stuff and spoke so clearly with minimal "ums" or wasted words. Seriously, what a splendid use of my time. I learned so much in these 30 minutes, I wish every salesperson at Subaru would show this video to prospective buyers to show them how great the new BRZ/WRX engines are. I have an FA24 WRX and got protuned to 315 hp and it feels incredible. I, and my EJ WRX buddies, all agree the new engine just feels so good.

The FA20 is what should've been in the 2008 WRX

FA20 WRX owner and yes the wave of torque from 2k to 4,5k is massive. Don't have to ring them out to have fun. As street car and snow drfter having all this torque down low makes them super enjoyable

@ace7912

3 ай бұрын

By ring them out, do you mean like the copper orings?

@YouTube_Scientist

3 ай бұрын

The 24 isn't what you will think with the damn tuning FYI

@twanheijkoop6753

3 ай бұрын

​@@ace7912 ringing it out means going high in the rev range in this context.

@ace7912

3 ай бұрын

@@twanheijkoop6753 ah okay thx

@ace7912

3 ай бұрын

@@twanheijkoop6753 ah okay thx man

In any other conversation, this gentleman would sound like a surfer dude, but it’s awesome to listen to him talk about Subaru engines, where he appears to be a savant

As a FA20 owner my tuner was surprised how much power he got out of the car with minimal changes plus e60.

For reference: My FBO (intake, DP, 93 tune) 2014 EJ257 STI makes about identical power as my buddies 2018 FA20 WRX (Intake, DP, 93 Tune, FMIC) - Although I have him on the very top end - 125+mph ---These FA20's and FA24's are definitely on my list as my next daily!

The wealth of knowledge you have and share is amazing. Thank you.

Learned a lot about my engine today besides running it for ten years now :-D Thank you!

Great video, wow so informative and great to hear your valuable analysis

Your wealth of knowledge is priceless, Mike. I absolutely love watching all your vids and especially the Subaru related ones.

Great info,soft spoken,love this guy.

Fabulous technical info backed with facts, experiences and delivered without hype! Thank you.

I cannot get enough of your content. Thank you

Appreciate the effort you guys put into these videos. Currently driving a '22 BRZ with the FA24, great little engine so far!

Badass break down this will help the community out thank you sir

Thanks for doing this video with such detail and sharing your knowledge!

This guy Mike is a trip! He’s always smiling while conversing, which makes me smile and is very knowledgeable!

I really enjoy watching these videos. This guy has such an effortless way of talking & sharing his knowledge, which is extensive. Good to watch no fuss, no clip bait,all style & no substance videos. 👍

Great stuff man, good work!

Phenomenal video and presenter. Give us more of these!

This was superb! Thank you. Would love to see a comparison to the EZ30/36.

Wow. You are a wealth of knowledge, Sir. Thank you!

You guys made it! Thanks!

Great presentation! Explains things well. I'm partial to EJs (I own 2) and had an FB (not an FA but I've driven one of those). Great food for thought.

Love to see how engineering improves over time. Great breakdown!

@beckers1330

3 ай бұрын

Not with everything, EJ sump plugs last forever. The FA type uses a small 14mm head that gives problems. The FA and FB engines have heaps of oil leaks from the timing chain cases.

Part of it may be that fewer are tuned, but we see very few blown FA at my dealer. Mostly just rod knock on cars that are heavily tuned, or modified with no tune. Also carbon buildup, but thats rare on cars driven hard. No head gaskets, no oil burning. I just wish they came with unequal length headers for that classic sound.

Great Video Mike!

Great knowledge and enjoyable listen, learned lots about my FA20

Thanks for the great video! I have two cars with EJs, myself. Both are white. I have a 2004 sti and a 2010 sti. The 2004 is my built one, the 2010 is my daily. The 2004 has had about 619 whp (used to be 602 whp before I got the killer b holy headers max and re-tuned) at 35 psi for about 25k kms now. I got the closed deck short block from IAG. The 2010 has a rebuilt motor with proper pistons and all the oiling safety mods. Only power mods are a 3" catted TBE and a tune. It's only at 263 whp at 17 psi. It could have made more, but I had no idea the 2010's ecu can hold whole multiple tunes before I bought it. My wife doesn't like the feeling of acceleration, so I asked my tuner to keep it as low as possible for my daily. Kind of the opposite most ask for. He assumed I knew about the multiple tune thing. I might get it tuned for 19-21 psi eventually, or whatever the oem turbo can do.

Wonderful video. Makes me feel great about my newly acquired 2021 WRX!

How alone I felt in 1998, with an '86 EJ-82 Turbo... bored and sleeved to 95mm making it a 2L from a 1.8L... even had the oil pump rotor sleeved so it wouldn't wear the block... JE pistons, crower cams... before Subaru's were cool I guess 😃

Great Video, great content all around. When making these videos it’s hard to nail everything in one video but you pretty much got it all. Anything not mentions is just the peanut gallery picking the fly poop out of the pepper. In regard to the oil pump observation about the small diameter holes. The one you said you bore open to port match the head. Note: my fluid dynamics is self educated and Subaru STIS supplies no specific information about it other than oil pressure specs I theorize the diameter of the outlet is set to help build oil pressure during cold engine startup. **FA20 was designed to be a fast daily not a track car The instant high oil pressure would help lubricant components. Additionally the instant high pressure would allow the AVCS to perform instantly. I’ve learned that when questioning any manufacturer design, it’s import to ask “is this for engine longevity and/or emissions?” Upon cold start, A stock un modified WRX, needs to ready the CAT within a specific amount of time; or a code will set. This instant high oil pressure will allow the AVCS to retard the timing and heat the CAT faster. Also maybe the reduced bore was set to help with syphon oil from the sump. I am honestly curious about all of this and would love to see oil pressure specs of stock vs modified using a pressure transducer over engine warmup. Overall this is just me spit balling Keep up the good work

@motoiq

3 ай бұрын

We open the port to match the size of the main gallery.

A mechanic with the knowledge of what hypo and hypereutectic steel performance differences are is a man worth listening to. Metallurgy is no joke.

@jamesgeorge4874

3 ай бұрын

Eutectic refers to the amount of silicon in the aluminum, not steel.

@emel60

3 ай бұрын

@@jamesgeorge4874 No. Eutectic and eutectoid terms are applicable to any alloys, referring to phase transformations and lowest melting points. For steel, check the Fe-Fe3C phase diagram and find the eutectoid point. I made a mistake of typing steel in my comment above without specifying the steel components of the pistons, as the Subaru engines blocks are made of aluminium alloys,

@MisterLiBRiUMz

13 күн бұрын

Pretty sure he's an engineer!

@jamesgeorge4874

12 күн бұрын

@@emel60 Except In this case, which it does. Please mind the context.

@jamesgeorge4874

12 күн бұрын

@@emel60 Sure, but this engine is predominantly aluminum. And the creator acknowledged it already. It is common to use hypereutectic alloy pistons, because they are strong, and hard, but they exhibit lower expansion characteristics than eutectic pistons, allowing tighter tolerances, and lower emissions.

Good information. A couple notes, though: while timing chains may be designed as lifetime fit, the history of modern cars necessitating massive timing chain system service after 100k miles or so due to component failure means that's not always the case. EJs do have a block oil vapor separator, at the back of the engine on the right side. They tend to leak and cause people to confuse leaky oil vapor separator covers for leaking rear main seals. SOHC phase II EJs (generally post-1997) also use roller rockers. I never cared for shim over/under bucket valves so the FA is a welcome improvement.

Love these videos!

Excellent presentation - no superfluous wordy crap and just the data and reasoning behind design differences. Old Navy nukes such as me appreciate this.

Excited to see more fa20dit content! Would love to know more about making power! Im hyyyyype! Love my VA WRX! Hearing about how to helped the oiling issue was huge! Hopfully that help me not spin a baring!

Awesome video! Would love to hear more about the FA24Dit. These seem heavily de-tuned from the factory.

@mrblock2013

3 ай бұрын

Technically every engine is "detuned" from the factory. Manufacturers will always pick reliability over performance especially for economy cars. When you turn up performance on a stock engine you are turning down reliability. They have limitation on the components just like the EJ and FA20 does.

I test drove a WRX with the FA and in stock form with the VF52 turbo, it felt just as lively as my Forester XT with downpipe + tune (TD04 turbo).

FA24 in my 2019 Ascent and 22 WRX have been rock solid so far. Neither burn a drop of oil; it’s refreshing.

@AntilleanConfederation

2 ай бұрын

Good to hear. What oil you running ?

Love this content 💪🏼💯

Good Info. Thanks.

Thank you for your information . Much respect 👍🇦🇺

thanks for that,brilliant explanation

Love the breakdown from professor Mike. Always appreciate the shared knowledge.

I loved my FA20, it was FBO E60 and lasted 3 years till I got rod knock. So your point about the bearings makes sense. I moved on to a built STi and I love this car way more. FA is still cool though.

Great Video! What exactly did you do to the GR Cup Engines when you said Service-Rebuild? Where these blown engines and if yes what were the failures?

@motoiq

3 ай бұрын

believe it or not when the cars crash the front cover gets destroyed and it takes out the heads!

It is pretty cool to see how many of the issues that have come up over the last 20+ years with the ej series motors have been addressed with the FA. Definitely not perfect but they have definitely started taking steps in the right direction.

@inshallah4280

3 ай бұрын

Well I’d hope that they’d want to improve the flaws 😂

Protect this man at all cost, truly a subaru guru! Im gett8ng a TR now

Great Vid!

Could you do a video on Subarus 6 cylinder engines the eg33 and the ez30/36

MAN, If this guy was my dad i would have the wildest Subaru & K24 swap ek hatch builds you could imagine 😅

I'm in the "small" camp of WRX owners who don't plan on making very much more than stock power ever. I bought mine new in '21 and won't be doing any tune-required power mods until after the powertrain warranty is gone, even then I'm looking for around 300 HP only. I just want a fun, reliable daily and that's it. I've improved the driving performance massively just through suspension, brakes and shifting mods. That said, a large factor in getting the WRX over the STi was the differences between the EJ and FA. Having dealt first hand with EJs and their weaknesses I knew I wanted the changes the FA brought.

@mickdabz

3 ай бұрын

300whp is pretty good u won't be gapping v8 mustangs but u can def have a lot of fun

@bendtheski

3 ай бұрын

I have a 21' limited that's around 300 with a sway bar kit and some chassis bracing, plus Grimspeed manifold. Voided warranty at about 5k, but no issues so far, and car is infinitely more fun to drive! Spool-up happens way quicker now, so pulling out of hairpins is one of the car's most gratifying features. This is a great video; seems like if Subaru had chosen to produce more STIs, the FA24 would have been the preferred power-plant.

@axeya366

3 ай бұрын

Im running my 19 stock. Just braces and exhaust and some wider wheels and performance tires and is quick enough not for racing but taking it on windy roads and in the wet.

@boostedrex9460

Ай бұрын

Didnt buy my car to gap mustangs or race any other cars. Bought the car for the feel of the drive ​@mickdabz

The comment on the weak transmission near the end- did you mean the aisan trans in the 86/brz, or a subara trans? I think in either case, you did mean a manual? Thanks

Former 400+hp fa20 owner, now in a 400+hp fa24. I much prefer the vb over the va wrx. I’m on different turbos for each so it’s not quite and apples to apples comparison (BL54x va vs g30-770 vb). But man. The VB is just so much fun to drive. Also, thanks for the vid comparison! One day I’ll pick up an EJ sti 😍

great info!

Man he knows his stuff.. can you do a review on the G16E-GTS on the Corolla GR.

great video!

Thank you min 21:00 on is what i came for! Is that all for oiling?

Please can you do more NA FA20 tips, builds, and info? Thank you!

@motoiq

3 ай бұрын

That is coming

@BrewProof

3 ай бұрын

Tip: dont try to make big power on any NA subaru boxer. the heads limit the cam options to the point of making it futile.

@ellisjackson336

3 ай бұрын

@@BrewProof I’ve never had interest in making big turbo power out of the 86

@ellisjackson336

3 ай бұрын

@@motoiq thank you!

@rawrbrz

3 ай бұрын

@@motoiqty!!

Been waiting on thhis one!

OH automatic LIKE gonna love this!

Good stuff 👏

Thank for the extremely informative information you've provided on the FA20 engine. Do you think a set of restrictors in the oilways that feed the heads would help to prioritize the oiling to the crankshaft and rod bearings ? Another thought is to make a spacer to lower the oil pan 25 mm, extend the pickup and provide oil control at the bottom for the oil pickup and what's you thoughts on this?

@VinRZ

3 ай бұрын

There is a post in the FT86Club forum talked about putting a restrictor at the heads' oil passage inlet, so more oil can flow into the block. But idk how legit is that solution, since our AVC needs oil flow from the heads.

@motoiq

3 ай бұрын

The engine has better oil control by an order of magnitude. I think restricting the top end oil might help but since this engine has HLA's it could be an expensive experiment.

Mike, when you mentioned how, on the FA, the upper pan directs the drain back to the pan through separate passages and tubes into the lower pan a light bulb went off in my head. Much like the oil pump passage to the mains being much smaller than the galley in the block, do you think the drain passage size is inadequate on the FA24 and could be the real culprit in the oil starvation when the GR86 and BRZ are run on track?

@motoiq

3 ай бұрын

I don't think so. Like I said in the video GR86 Cup cars are not loosing engines and they are real race cars and the engine is totally stock

Having gone from a 2020 WRX to a 2018 STI because it seemed like a natural progression, I have no issues or hesitation saying that I hands down prefer the FA from my previous WRX over the EJ in my STI. None. I put 36,000 miles on the WRX and have now put 17,000 on the STI since buying it. I am not joking when I say the first time I got the full taste of a proper launch in the STI, I was as hooked as those tires were. But that feeling is very out shined by the way the engine behaves the rest of the time, I am constantly on edge and babying it afraid it is going to disassemble itself. With every single revolution it feels like it wants to spread itself all over the highway, I signed up for AAA thirty years early because of it to be honest. The only disappointment I could possibly express about the WRX was the open diffs in the front and rear, I couldn't care less about that DCCD nonsense. I have no doubt that if the opportunity to pick up a < 2022 WRX Premium 6MT with the "Performance Package" presented itself I would be calling the seller right away. Then I'd be following that call up with a search for an STI transmission swap.

@Menace_sti

3 ай бұрын

Coming from 141k and only having oil leaks from the valve covers. You dont need to baby it lol i launched this thing more than enoght and rans really good.

@aland7236

3 ай бұрын

@@Menace_stiDriving it around on the highway reminds me of taking my Dad's old F250 up to 70mph, it feels rung out and ready to 'splode. Plus IDK how the previous guy treated it for the first part of it's life.

@Menace_sti

3 ай бұрын

@aland7236 probably time for some suspension mods and new mounts either tranny or motor 🤔

Didn't know the FA difference between SUB and TOY's DI only and dual injection, would definitely affect which one I'd buy. I think walnut blasting your engine every 50-80k is a bigger deal/hassle than an EJ timing belt every 100k/10yrs (I've done it twice on mine).

How’s that built 1GR going? Any dyno numbers?

Can you make one of these about making a na fa20/24 hybrid from the newer gr86 into like the older brz/frs?

@motoiq

3 ай бұрын

No, it's not worth the effort, the difference in the engines are minimal.

My experience is limited but my FA24DIT was silky smooth and never had a hiccup over 60k miles

@JohnUnit

3 ай бұрын

I work at a Subaru dealer and they've honestly been great. They were selling Ascents for about 3 years before we had a head off any of them, and that's in a busy 10 bay shop.

@RadDadisRad

3 ай бұрын

@@JohnUnit yeah I had a 2021 Ascent Touring. Other than the transmission being a turd off the line and in general and the low power it had compared to other vehicles in the same segment I couldn’t keep it forever. I started getting transmission slip at 10k miles. Driving down i29 in a headwind. Speed limit is 80mph I was doing 85mph and the headwind was 20-40mph. I noticed my speed was staying the same but my rpm’s were going up and down.

Please do a 4G63 vs 4B11 comparison and maybe some differences with honda/k20 also!

@motoiq

3 ай бұрын

Good idea

Would you say getting aftermarket pistons with lower placement of the first compression ring is the best reliability mod for the EJ at higher power?

@motoiq

3 ай бұрын

Yes or the first one needed depending on how high the power you want is.

Your only replacing chains if they are stretched, that only happens if your late on oil changes with time, well maintained chain driven engines can last a long time

I’m so happy when watching this guy.

I've had my 86 at 400whp for roughly 35K KMs and haven't had any issues. Engine has never been opened so all internals are factory. Last time I had the car in for work i had a compression and leakdown test done, results were surprisingly good. I was not expecting this engine to last at all, but it has not skipped a beat. Trans oil did show some signs of wear when it was last replaced, but it feels exactly how it did when i drove it off the showroom floor. I never knew about the oiling issue on the mains. If i ever bend a rod and have to open the engine, ill be looking into the modifications you suggested to ease the restrictions at least. Thanks.

@motoiq

Ай бұрын

The Stock FA is stronger than the EJ.

I cant speak on the FA timing chain, but replacing timing chains in necessary. Not as often as a belt by any means though. One example was my 2003 crv. When i held the chains next to each other the old one was an inch and a half longer, and i could fit a screw driver between it and the gear.

@motoiq

3 ай бұрын

GF-6A oils should reduce timing chain wear.

My 2018 FA20DIT wrx gets 36+mpg on the freeway. What other Subaru has ever done that?

Gotta get my cars built by you guys

Wake up, samurai, new MotoIQ video dropped!

@tommylyeah

Ай бұрын

Actually, I've never owned any Subaru, I just love MotoIQ.

Ej253 here. 2008 Impreza Outback Sport. Had it rebuilt and runs great.

@enemyspotted2467

3 ай бұрын

I had one of those in an ‘05 OBS. Great little car, was loads of fun and it’d go absolutely anywhere, through anything, all while carrying a enormous amount of cargo.

I will also say the Subaru dealer process for carbon cleaning doesn't need the intake pulled, and even doing 2-3 rounds of it will still be cheaper than anything where you re/re the intake. We have good results with it, even when it's bad enough that the car is throwing a check engine light. That's more common on the softly driven Forester XT anyway. Most WRX guys give it an 'italian tuneup' and blow/burn the carbon out daily anyway.

@motoiq

3 ай бұрын

My opinion is the liquid cleaners don't work nearly as well as walnut unless you get in there and scrape it with picks.

Could you use the FA20 shortblock from a WRX in a BRZ/FRS engine if the plan is to boost it? It would seem like a quick way to build a turbo engine for the BRZ/FRS if you do not plan to make more peak power than a stock WRX engine can handle.

@motoiq

3 ай бұрын

It's basically the same engine, you can make more power than the transmission can handle on the stock engine.

Oh the toil of valve adjustments on an EJ. Those who know, know. Overall, I’m impressed with the improvements made on the FA!

@geniuskingofthebes6499

3 ай бұрын

Valve jobs on the FA SUCK, but its reward his high when done.

27:46 I wonder how effective the kit that Subaru sells is for removing the carbon. This kit is basically a cleaner that is put through the intake - I had planned on doing this treatment at 50,000 miles.

@motoiq

3 ай бұрын

The chemicals are not as good as walnut blasting, there are before and after pics on google if you want to see.

@01hafkee

3 ай бұрын

Out of curiosity wouldn't a water/meth unit like Snow Perf that mounts upstream keep it carbon-free? @@motoiq

@motoiq

3 ай бұрын

I think it certainly may help. Possibly a lot.

I'd be keen to see you talk about the GR Yaris/GR Corolla G16E-GTS 3cyl. Powertune Australia just made 750+hp at the hubs out of a stock bottom end which is pretty insane

@truckingjamaicans5045

3 ай бұрын

The walls are thick as brick😂😂😂

@motoiq

3 ай бұрын

I will be getting one soon but from tuners in other countries, the engine has a reputation for being pretty strong already.

@andrewlangford88

3 ай бұрын

@@motoiq keen to see it!

Great call out with the oiling issues and potential fixes with the fa! Have you guys done any na fa20 performance builds?

@motoiq

3 ай бұрын

No, generally I talk people out of that. You will get a 2 liter with a narrow powerband and less torque in a heavy modent car.

@ace7912

3 ай бұрын

​@@motoiqgood to know thanks, i was researching if ej25 swap to fa20 is feasible

@motoiq

3 ай бұрын

A mild build with a 2.2 stroker, cleaned up heads and mild cams will be nice but not an all out high rev NA build.

@ace7912

3 ай бұрын

@@motoiq interesing, would it be like that with a turbo fa20 or fa24 as well? Just curious if it's worth the money to build an EJ or to try to swap to the newer engines

@motoiq

3 ай бұрын

I would build the EJ as that engine is pretty developed. It's probably cheaper to fully build an EJ than sort out an FA and the electronics, then the FA would only be stock.

Would be cool to do a same style video comparing the 4G63T vs the 4B11T

@CarimboHanky

3 ай бұрын

4g63 engine is great! 15 years ago i swapped a 4g63 engine into a hyundai excel 😂 ultimate sleeper

Thank you for shinning lights at the FA family Mike! Knowing that FA2xDIT have fitted in a scavenge pump from the factory turbo, such that we don't usually see lateral G oil starvation events from the WRX, however can you please shine lights at the reason on why FA2xD (twins' engines) are particularly proned to lateral G oil starvation events? And what are some of the aftermarket solution that the twins can combat this without using accumulator?

@motoiq

3 ай бұрын

I think it's oil slosh or oil consumption and people not paying attention to the oil level at the track. It is interesting that the GR86 cup car engines we have worked on have had bearings in great shape and those are legit race cars with high level drivers and sticky tires. I think running an AOS, the IAG baffle and pickup and if you are extra paranoid, the Killer B baffle that prevents oil from sloshing into the front cover area should stop it. Also any car needs to have it's oil checked and kept on the full mark when being driven on the track. You need to check every session!

@VinRZ

3 ай бұрын

@motoiq Mike I wish I can agree to that, running greddy baffle (basically timing cover block off + horizontal baffle) + 1 qrt overfill still didn't help some of my oil starvation events, with the fa24d

@VinRZ

3 ай бұрын

@@motoiq Like this video I clipped, i was running 6.5 qrts total oil with a greddy baffle. kzread.infoUgkx7wXXgkw2NjMS0ZJR2B0jT9yGsplDo-Pm?si=HZdB7D-u9z8Cvfa_

@Adam-ub9nu

3 ай бұрын

​@@VinRZoverfilled it by a quart, eh?

@VinRZ

3 ай бұрын

@Adam-ub9nu there was supposed to be a link that I showed. But it's probably under reviewed. Yes the car was baffled and 1 qrt overfilled. There will be at least 1 qrt suspended within the engine when it's running, I checked that when the engine is at idle. Dipstick went from full mark to min mark, after the engine turned over.

I could listen to him talk all day

When it comes to the fragile Subaru transmissions, do you find upgrading to aftermarket gears/synchros allows for higher power tolerance or is it an issue with overall design of the casing?

@motoiq

3 ай бұрын

You mean the 5-speed WRX transmission? Currently experimenting with blast plates and cryo/wpc. Probably isnt going to do it. We were not able to get the BRZ/FT86 trans to hold up very well. The Six speed STI trans is pretty damn strong.

FA has alot of improvements but it looks like there were some sacrifices made for daily use reliability. Thank you for the clear breakdown

@motoiq

3 ай бұрын

Actually the changes were done to improve daily reliability, the only flaw is the oiling system and that is in the case of adding extreme power.

Two issues with the FA that I've seen while working at a Subaru specialist shop that weren't mentioned... 1) Cam Case Seals - The cases that hold the cams in, the RTV fails and leaks around 100k miles on all variants of the FA/FB engines. Costs about as much as a timing job on an EJ to fix too due to the labor. 2) Injector seals blow out - Not sure about the new FA24, but the FA20DIT certainly blew out Injector seals at times. This could damage the motor, but not usually. Not a huge issue, but it happens.

@motoiq

3 ай бұрын

1. I forgot to talk about that, my bad. 2. The newer engines don't have that problem and the ones that have the bad parts probably had them fail and get fixed by now.

12:00 i spy a WPC treated piston source: i just got my WPC'd pistons in today 😍

Love these kinds of videos. They’re like brain sex for car guys. Question: iag seems to concentrate mostly on the EJ series for builds, is that just more their wheelhouse or a technical reason. From what you’re saying the FA seems better thought out.

Mike, how are main bearing speeds at particularly high rpm on the FA? Could be getting time to abandon my budget destroked EJ257/20K with shimless lifter combo that I'm putting together...

@motoiq

3 ай бұрын

I don't know, I didn't figure it out. I am not an advocate of high RPM builds unless there is a reason for it. I shoot for area under the curve, this is a more satisfactory driver experience and usually lends itself to faster lap times especially with OEM like drivetrains.

If you did on ej20 pins, cdb, rear thrust, ej25 crank, maybe even 14mm head studs. What would be better if you get better rods for fa20 and do that mod to add flow to fa20?

@motoiq

3 ай бұрын

The EJ would cost 3x more.

I have a 2017 86 with a FA 2.0L. I’m using 0w20 recommended viscosity oil made by Valvoline. Thinking of switching to signature series Amsoil instead. Do you think that is a good choice or should I just stay with valvoline gold 0w20?

@motoiq

3 ай бұрын

I think you should run a 10w40 SF rated full synthetic if you are a hard driver.

@anthonylove6639

3 ай бұрын

@@motoiq thanks for the suggestion but it’s mostly a once in awhile weekend car or emergency ride when we need it. It’s 7 years old and only has 7,900 miles