Subaru's NEW Boxer Engine - The Science EXPLAINED

[@Donut]

What are your thoughts on the switch to the FA24? Should they put it in the BRZ?

[@taylordufrene7726]

Only if they keep the redline above 7k- I love wringing out mine above 5k! Feels so good!

[@trevorflanagan4873]

Yep

[@joemaddoxrx7]

www.mazdaforum.com/forum/mazda-rx-7-33/joe-maddox-super-rare-1-100-1989-fc3s-gtus-rx7-2jz-gte-vvti-build-43602/ I have found and saved the rarest Mazda FC RX7 ever made! Now this car is rare. Really rare! Let me break this down really quick... Ever heard of the rare 100 GTUs rx7s? Only 40 have ever been claimed and only 7 are confirmed at the time of this posting! Here are the rarest rx7 FC3S models: 1500 10AE Turbo models 1400 infini 1000 winning limited 150 final edition convertible 100 GTUs... out of that 100: 83 red on black 10 black on black 7 white on blue There was only 100 GTUs models created between 1989 and 1991. If you own one of these rare models sign your car up to the registry list here on any of the rotary forums!

[@BhuvanTeja98]

What about solenoid valves?

[@Dryst08]

no i think they just need to add more torque to the current FA20. it's fine as it is.

[@TheJOHNJOHNIIII]

I dont know if anyone else have said this, but, the animators for the channel are great and deserve more respect

[@GustavCarl17]

69th like

[@Donut]

The best - Jeremiah

[@TheJOHNJOHNIIII]

Donut Media thanks Jeremiah , appreciate you, keeper goin

[@matf8436]

totally agree

[@senseiblu]

Jeremiah the GOAT ❤️

[@Ash543212]

I'll be honest, I didn't give this show a chance but this guy really won me over and now I can't get enough of these. Keep it up bro👍

[@iuopunderstandyourjokes9914]

Same

[@stupidsnek]

I had the same mindset

[@Classic_Workshop]

Still miss science garage

[@iuopunderstandyourjokes9914]

@@Classic_Workshop me too

[@HourRomanticist]

He is a bit of a crackhead but he's cool

[@EvoluciaCT]

KZbin getting way to comfortable with these double ads.

[@JamieR1988]

Yeah, no joke!! Literally, and I mean literally, every single video I have watched today has had double unskipable ads. And it's always Trading 212 & Amazon Audiobooks!!

[@philosopherstoned832]

😂

[@NaniJapaneseForWhat]

Sometimes I get 30 second double ads

[@brr4328]

At least they put the yellow bar under so I know how much to skip ... but I think they should do more like running on the bottom ones or some shit like tv lol

[@rk4921]

ublock origin...

[@thomasmaagaard]

"Linear motion to rotating motion; it's all an engine does" *Angry rotary noises*

[@VonGeggry]

@Phillip Aubin i.kym-cdn.com/entries/icons/original/000/021/665/DpQ9YJl.png

[@ΓιώργοςΤσακίρογλου-ι2η]

kzbin.info/www/bejne/pZS9Yambj8-ceNU Just as you said.

[@harveysmith100]

As a Wankel engine, I beg to disagree.

[@noneyabizz8337]

Uhhhh.... No

[@installshieldwizard3017]

@BEST More like, ꜰᴀᴀᴀᴀᴀᴀʀᴛ

[@barron204]

The EJ engine design is 32 years old this year with the STI Legacy RS RA being 31. That is an antique by today’s standards. It is great that Subaru is finally using a new engine.

[@constitutionalrepublican1611]

i own two 1993 legacy turbo sport sedans and have a 1990 legacy sport sedan aswell. ej22t with 5speed awd. the grand daddy to the sti. ill contemplate doing a fa swap in one of the 93's. 400hp is good enough in those, lol guess i can push the bar a bit with a new setup

[@bradd4664]

@@constitutionalrepublican1611 Can't really go wrong with the EJ22T though

[@constitutionalrepublican1611]

@@bradd4664 nope def cant

[@subarnosinha8042]

Rolls Royce (later Bentley) V8 was in production for 61 years, from 1959 to 2020. 31 years of EJ look nothing compared to the RR V8.

[@RG-in7ks]

Subaru dropped out of WRC in 2008, who even cares what engine they dump at this point?

[@JamieR1988]

You've came such a long way in a very short time. I honestly couldn't get on board with you, but now you're just genuinely awesome. Sorry for my doubts.

[@Donut]

Thanks for sticking in there with me - Jeremiah

[@swalling22]

Agree 💯

[@djbis]

eh.

[@darkproject3368]

He's such a good teacher

[@JamieR1988]

@@darkproject3368 Yeah, definitely.

[@masteryoda6568]

We need to show more love to the editors. They do such an amazing job on these vids that they don't get enough attention

[@Donut]

Love our editors, they’re so good - Jeremiah

[@masteryoda6568]

@@Donut thats great!!

[@dilligafco.official9887]

Cant lie Jeremiah's energy makes this show SOOOO enjoyable...the cars are cool too😂😊

[@timjones3866]

He's way better than anyone else on here now. (But I miss Bart from Science Garage 😭) PS. New most hated word "herse-pers"

[@darkproject3368]

literally. hes a beast.

[@herejust4cars723]

@@strucep happened to everyone

[@edwinjimenez6435]

"One of the most iconic automotive sounds out there" -Does not allow the sound to be heard

[@NicholasLeader0]

Edit fail

[@pepperfish_]

Yes the sound of a VW Beetle

[@edwinmoreno8726]

Sound could be copy written

[@jimmya9579]

The sound is from unequal exhaust headers, change the headers to tuned/equal length and it sounds like a lancer

[@PapaA7145]

I’m too old to accept the words 4 cylinder and rumble in the same sentence. Just purchased a 2024 Forester Wilderness, so far it is fun to drive but no noticeable rumble. Good video, thanks.

[@Thefrostedslime]

Subie fans: "Subaru needs to just give us a new engine, this engine is just so out dated." Subie fans when Subaru gives in: "I don't want that."

[@gickygackers]

eats oil like a motherflower. Not good!!

[@georgejones5019]

@@gickygackers *Laughs in rotary.*

[@adriansteve8159]

Its nt a subie without the rumble

[@ninjafang2]

@@georgejones5019 *me laughing after rotary swapping my sti*

[@logantodd5943]

Mom engine!

[@markmalinowski5951]

"direct injection is better for your engine" dirty intake valves: "am I a joke to you?"

[@negativeindustrial]

That’s exactly why the Toyota D4S system has both. Toyota does not place their reliability reputation at risk.

[@RidgelineJames]

@TehChickenPie my brothers FA spun a bearing at 70k miles it was so much work to split that block and put it back together.

[@austinsears1637]

@@RidgelineJames really!? That's crazy! Are they worse than the regular EJ to split!?!?

[@SS1LE_Urien]

Had to put a catch can in my car.......as mine is all direct injected :(

[@ghoulbuster1]

just clean then 4Head

[@birddude3123]

Day 36 of asking donut to do an b2b on their cars or maybe an up to speed or d-list

[@kevinburge5266]

A D-list of donut employee cars would be cool

[@danielbuta2372]

A b2b on their cars would be awesome

[@phoebeeileenbrooks110]

I think Jeremiah did one on his Camaro and it was hella schweeeet

[@noobplayer_23]

Or maybe up to speed on James's Dad or gf

[@Rlyeh_The_Dead]

The chassis of the BRZ, FRS, 86, is soooo good to work with. More power can definitely be added and minor adjustments made to make the chassis handle the extra power with ease.

[@johnmccombe6342]

I recently picked up a 2023 wrx and couldn't be happier. The engine is more durable, stronger and most importantly, more powerful. Specially can handle a bit more tuning from stock then the ej.

[@quinncochran9781]

When is the second season of Hilo coming to KZbin?

[@dxmbeats2315]

Yo. I neeed.

[@Donut]

July!

[@dxmbeats2315]

@@Donut cant wait

[@OceanWolf808]

Donut Media it’s gonna be with the Tacomas isn’t it, as teased by James? Tacoma fanboy here lol

[@MustangDisaster]

Aye!! I’m so excited, next they’re doing tacos

[@spenceweb]

2019 car that every you tuber got: mk5 Supra 2020: C8 Corvette 2021: new sti

[@gkb]

Darth Bandit nah 2021 will be the new Nissan 400z

[@bigchunkydude4278]

@@gkb 300z*

[@thealifrs4_463]

nah 2021 will be the new M3 with lung grille

[@user-bm9cv9vn2k]

@@bigchunkydude4278 350z => 370z => 400z

[@Sheridantank]

gkb I vote 420Z

[@justicewing]

for 1 sec i thought its the return of science garage when i see thhe word SCIENCE! i miss bart! luv u too Jeremiah!

[@Donut]

Love you too! - Jeremiah

[@ernankortes7107]

@@Donut Jereboy can you add more animations how specific engines work? Like Bart used to do There are plenty of engines to look through, for example RBs

[@Moracycle]

Just don't have a baby...

[@jsplit9716]

@@ernankortes7107 I'm pretty sure he doesn't do the animations. Donut has a big crew of writers animators, editors and hosts.

[@ernankortes7107]

@@jsplit9716 sure Bart didn't do but Jeremoo could use other people's animations to talk about specific engines for example

[@rivergewehr4817]

If only all these rumors about the 2022 Sti turned out to be true😢

[@SchoorbinMeHam]

Picked up a 2022 WRX 2 months ago and after seeing this video I love my car even more

[@danieldavila4999]

"You know the thing people use for honey you - I actually have one, I can show em." Me: *intrigued to see* *Nothing comes* Me: *sad*

[@Dialysisforever]

www.amazon.com/Creative-Hobbies-Dipper-Dispense-Drizzle/dp/B00I27TVIA

[@lilstoopid6198]

Thank you Jeremiah for reminding what day if the week it is

[@TBustah]

People are mad about this? At least it’s still a boxer. It’s not like they’re throwing the old engine out in favor of an inline four or (worse) an electric motor. Choose your battles guys, we should be happy that they’re sticking with ICE at all at this point.

[@maggi98mw]

Both would be awesome. High revving NA-Boxer and a 100ish hp eletric motor for the low rev-range

[@slothystyle]

I think most are just mad about the UEL headers being d/c on FA24. I'm personally excited to see what Subaru does in fact roll out for the next gen sti regardless of no EJ.

[@jdmking4776]

Hello. I work at a dealership and I cab promise you the engine is going to be an issue child. I can say all of the non public issues about it, but when you dig into the FA24 things just don't look so good for it...

[@Russet_Mantle]

Your animations make it really easy to understand what you're saying, and your explanations are also clear and simple. Great job!

[@machina_spirit]

‘Whats new on the engine, lets take a look! Whooo!- BAM! HIT YOU WITH AN AD

[@Dethmeister]

I think I got 6 video ads. 1 at the start, 3 during the video and 2 at the end.

[@curtissdesigns]

@@Dethmeister I know. Today we're gonna talk about Subaru's new motor (basically a lengthy commercial...I hope we're getting a kick back from Subaru?) But 1st a word from our sponsor that's not Subaru. Ok back to your commercial that you actually chose & wanted to watch...now here comes the good part BAM ad. Times 3-6 throughout your lengthy video commercial. ;)

[@rogerpattube]

Get Premium

[@adanflores4523]

@@curtissdesigns stop being broke and get premium

[@5610winston]

@@adanflores4523 Just boycott the advertisers, and be sure the advertisers know it.

[@MrGooberZ]

This channel has tought me so much about cars in the 2 months I've been watching this channel

[@fullbore782]

Thank you for crediting us in your video @DonutMedia We're glad we could provide helpful content that adds to the enthusiasm of car fanatics everywhere!

[@Donut]

Thank you guys for doing what you do!!

[@funkycarlover]

got here fast bc I drifted home downhill in my subie... first must have been whoever was in that damn 86!

[@JTENJOI380]

WAS THAT A PANDA TRUENO!?!?!

[@beansmcsquenz4444]

@@JTENJOI380 nah, just some speedy speed boi

[@Andy-Andeee]

Hello from 2022 where the New WRX has been released and the STi cancelled

[@raulferro3998]

You forgot to mention port injection also helps keeping your intake valves clean, on the other hand direct injection doesn't, but yeah it is way better overall than port injection, especially if your aim is power and efficiency. Get your catch cans ready...

[@Grooove_e]

The old EJ20s are the best in my book. The EJ207 in particular which has thicker cylinder walls and a semi closed deck block. Also has AVCS which is like Subaru's version of VTEC bby

[@scott__french]

I think just v7 forward have the fancy heads. I have EJ207 v6 in my wagon and I am pretty sure they have fixed timing (less complicated ECU work for a swap).

[@justinranes3351]

Vtec is variable valve timing and variable valve lift. While AVCS is just just valve timing.

[@VeliRajasaar]

Most of the EJ engines in the WRX and STI are semi-closed deck blocks... Only a select few early ones had actual closed deck blocks. Also, AVCS until 2008 was only on the intake cam, from 2008 onwards in the EJ257, it has been dual AVCS. Makes a massive difference... You are on point about the thicker cylinder walls, though.

[@MrBRIIIAN]

@@justinranes3351 that's ivtec

[@Grooove_e]

@@VeliRajasaar Yes there were a few fully closed deck blocks but I believe those were race only motors and I thought all of them were given to Prodrive for the WRC championship. There is a company called subi performance in Deutschland who will convert open deck blocks into semi-closed or fully closed deck

[@MidnightMidas]

sheesh that fa24 is so strong that the evo might come back XD

[@MJT-DA]

That would he the day!

[@joseeduardo4327]

It’s coming back now .... as a crossover smh

[@nakiwoo4586]

@@joseeduardo4327 a crossover... damn..

[@nakiwoo4586]

@@MJT-DA a crossover electric hybrid..

[@MJT-DA]

@@joseeduardo4327 Say sike right now!! Please :(

[@JZ-st5zr]

When are we going to get a Jeremiah Bike tour!!!! As a motorcycle fan myself i would love to know about his babies in the back!

[@carguyryan8027]

Hell yea

[@Moracycle]

Donut hates bikes.

[@Dialysisforever]

@@Moracycle Are you sure about that? kzbin.infosearch?query=motorcycle

[@birddude3123]

yx xy hayabusa*

[@Moracycle]

@yx xy they made one out of how many videos? Shot, They made more videos about Nascar then about bikes.

[@jv1990]

I hope they are sold as crate engines, I would love to swap an old forester.

[@ianirizarry30]

I was thinking the same thing

[@gtmike916]

I’d love to buy an FR-S or BRZ used and put this engine in there.

[@drifterslayer9245]

@@gtmike916 same I wanted to do that either for a brz/86 not sure they'll ever be a crate engine but there's gotta be salvaged acents around lol

[@yummyhershey5902]

@@gtmike916 boy have I got some news for you...

[@gtmike916]

@@yummyhershey5902 what’s up?

[@DennysD123]

New wrx has shown to consistently do 350whp with an intake and a protune (conservatively). And MUCH more with an e85 tune (which the stock fuel system can take) .. there is your “sti”

[@worldpaintedblack]

I Have one. Can confirm the engine is incredible.

[@chincemagnet]

They should have port and DI, to prevent carbon buildup

[@DragonKnightX12]

Was about to say Dual injection is best.

[@andrewsoltis459]

If they don't address the carbon build up with the FA 24, I'll never buy one. I have to run top engine cleaner in my 2016 forester style at every oil change so it doesn't become a dog. Definitely an issue they need to address.

[@fsfs555]

Subarus are already bad about top end deposit buildup. Without a catch can (even on NA models) you're going to need to de-coke your intake pretty frequently to prevent problems.

[@chincemagnet]

Frank Pickett I’m gonna have to check mine out then, I’m not having any performance issues, but who knows? I’ve got an FA20

[@misterjiggles5041]

@@andrewsoltis459 same. I've got a 2018 WRX and I'm not buying another until they really fix the issue, and I don't consider walnut blasting my car's innards a viable solution.

[@christianbrockrandall1157]

I should get my ex a new Sti since she gave me multiple STI’s :(

[@yadeenkabir1215]

I was slow for a second

[@CodyChan19]

Yadeen kabir you just had to build boost

[@kickyadick]

Yadeen kabir turbo lag in the brain 🧠

[@o-tuathail]

lmao that’s a good one

[@deathsdemon349]

Don't, get them an up badged bottom line imprezza

[@DeViceCrimsin_]

0:55 if I remember correctly that's a long stroke engine built for torque. Also this implies that the WRX and the sti will have different engines from now on ...

[@maverickslastoddworld6476]

@G M97 my 08 wrx has the 2.5 liter

[@gen1c8rs88]

@G M97 EJ25 for the North American market only as of recently.

[@subscriber6181]

@@gen1c8rs88 The STI has the EJ25, the WRX has the FA20 in the US

[@natesmith9007]

The wrx only had the same engine from 08 to 14. Thats the only time they have shared an engine in the us market I believe

[@henry3457]

@@natesmith9007 In '06-'07, the STI had the EJ257 while the WRX had the EJ255. They were practically the same engine, with slightly different pistons. I think the 257 was dished more? But practically the same engine.

[@donaldgitschier4495]

The USA doesn't have a STI for 2022, just the 2.4 in the WRX with 271hp 258 lb ft. The ascent has a 260 hp and 277lb ft. NO STI, the new rumor is an electric STI

[@dapeach06]

I'm just mad that the Outback got the FA24, and the Forester just got a "sport" APPEARANCE TRIM while losing the FA20.

[@danielsnell7605]

Same here bro. I'd be willing to trade in my fozz for a turbo model if they came out with a new one

[@ianirizarry30]

Yea they need to bring back the fxt with the new engine

[@confusinglysimple296]

Lol ikr

[@QueLastima]

Needs POWAH BABEH

[@jwilson2793]

Does sound like the 2022 model will be adding a turbo....just watch them only put it in a Wilderness trim

[@guruzini1971]

the length of the timing chain in that engine gives me anxiety

[@Erickzy]

It's very tin, it's going to stretch

[@wlteemo2734]

Well at least it's an engine that wont blow by 3k miles, I have 3 different friends that have had an engine blow before 8k miles. Subaru finally got their shit together I'm excited!

[@enzoc3869]

@@wlteemo2734 They do proper break in? Drove it somewhat normal?

[@justinranes3351]

It’s two chains. One chain for one head another for the other head.

[@seanissomething]

@@justinranes3351 TWO CHAINZZZZ!!

[@phantomlord3280]

This guy is so good at keeping my attention I didn’t even realize I hadn’t skipped the keeps commercial till it was over lol

[@freedom_foz_6337]

Here 4 years later as an owner of a new Ascent waiting for the STI still 😅

[@petdealer666]

Dude, the term "edutainment" was invented with you in mind. Never saw anything near as informative and easy to digest like this (and many other of your videos)... huge kudos!

[@guillermosanchez2783]

There are reasons why that old engine became an icon, so there are more things to ask for, like the rumble sound for starters, a great manual transmission, in a way to keep the tradition of the brand that kept people fascinated with the STI for so many years.

[@alexmg_]

When is science garge coming back? I miss it so much.

[@kabluwi]

Bart had a kid and left, he probably won't be coming back

[@mylesdante]

As much as i love this episode, long live the EJ!!!!

[@kurvin2719]

500hp crosstrek, goals. but this has made me excited about getting a new STI in two-three years

[@FredricMccubrey]

getting passed on the highway by an 500hp crosstrek would be an experience.

[@Mrdolla82]

Meaning I’d like to see it run not a glance at it for a few seconds like we got here lol

[@iii-cu6mr]

I just hopped on to this series this episode, and this style is so good for new car people or people that don’t know some stuff. If someone didn’t understand the engine codes for some cars, they’d have to look everything up themselves, but in this series, it’s explained to the basics and then brings the main topic, and I love it!

[@risingsun9595]

My family just bought a new Ascent. The car pulls like crazy and it weighs 4,600 lbs. I cannot begin to imagine what that would feel like in a WRX.

[@Obama___]

It’s pretty fun at first to 2nd but after that it it’s mellower but that also means the car isn’t smooth to drive normally half of the time no matter who you are, point is fun but you have to want it 😅

[@UpperDarbyDetailing]

Oh boy, the good old days when we thought we were getting an STI...

[@mistamaog]

We still got the engine at least

[@d.mat.zero6525]

Sooo they gonna put this engine in the BRZ? Or they gonna still try and find a way to justify charging the same amount for a BRZ as the WRX

[@Donut]

I’d buy a BRZ with this engine in it - Jeremiah

[@mikepatrick.zn6]

Different chassis, different purpose

[@sterlingroberts6240]

If you don’t already understand the core values of cars like the BRZ, no amount of explaining we do will help, so feel free to stop asking. You’ve made up your mind that the WRX is better, but I don’t think it’s too much to ask that people just appreciate all the cars we have to choose from before they go away. Pizza’s an excellent and extremely versatile food, but so is a Stromboli.

[@acaceres5788]

Current rumors are they will put this engine in the new BRZ sans the turbo. If it proves true, the hate will be tremendous.

[@M_Lopez117]

That last engine they put in the BRZ😬

[@VB_Bryan]

Currently watching this in my 23 WRX sad there is no STI.

[@fataxe1]

The port injector is used to clean oil and carbon off the valve on startup. It's to avoid dropping a valve from carbon build up. It also lets you avoid incredibly expensive periodic maintenance for walnut blasting or fuel treatments. We get to have the advantage of adding cheap port injectors for performance applications instead of expensive direct injectors, but it's originally for reliability.

[@pedjaspanovic9665]

The HP quoted for any of those models is not to the wheel, expect about 22% loss from drivetrain

[@jdmking4776]

Yeah neither is literally ANY Subaru's cars. The STI doesn't make 300ish either. Its closer to 220 or 240

[@rj7250a]

All cars power ratings are in the crank( BHP), if it's on the wheels it's WHP.

[@Brandonnnnnn]

@@jdmking4776 Pretty sure thats exactly what he said....

[@constitutionalrepublican1611]

@@jdmking4776 lol, my 93' makes over 400 with the ej22t factory engine. with over 190k on the odometer its been a good family car. glad i have another 93' and a 90 aswell. the sport sedan legacy model was by far a hit, as was the svx.

[@jdmking4776]

@@constitutionalrepublican1611 Yeah my setup makes about 550whp on e85. 350 on pump gas. I run a stroker ej205. I'm at 249,XXX miles right now. The GC8 is a good chassis.

[@Nathan-tz8yw]

I really hope they put dual port injection in the car, direct injection has too many downfalls. And I don't care if unequal length headers cause less power I want them!

[@IAMPOPP]

If it don't come with unequal length headers then the first aftermarket parts will be unequal length headers. Subie Rumble 4 Life!

[@ZFA1738]

Veterror yes! I own a 2020 WRX and I’m disappointed with the sound of not having the UEL headers. Hope Subaru keeps the UEL headers regardless of what is more efficient and makes more power!

[@30H13]

@@ZFA1738 just buy the aftermarket uel headers for like $700 then waste another few hundred on a tune for less power.

[@ZFA1738]

Zach Hovey I just might for the sound! It’s not a waste of money to me! I’m not poor lol only poor people can waste money.

[@30H13]

@@ZFA1738 wouldnt a not-poor person have just bought an STI? Just kiddin, but yeah respect so long as you got passion - just ask yer tuner what you should expect in the long run. Curious if ringland failures would plague the new WRX again if UELs are used.

[@nicholassmith4172]

I feel like after watching these B2B episodes I could go take the final exam of an mechanical engineering class and nail it.

[@PCGGC]

That power is not "to the wheels" it's engine output. The 2022 will be close to 400 output, probably more like 330 to the wheels

[@patio6]

Which is still amazing for a factory whp number

[@stiffybeanie4148]

@@patio6 yeah

[@davethecow445]

This is great, from an FA20DIT owner we asked for an upgrade in power and boy did we get one

[@wenull3]

I haven't drove a turbocharged Subaru but my wife's 2019 Outback has a 3.6R flat 6 and I luv that motor.

[@xyroah]

This show has really evolved with jeremiah...I loved it before and I love it more now😃😃

[@SkinnierSteve]

I really hope they somehow find a way to keep UEL headers for the new STI's, because that sweet subie rumble is the best car sound to ever exist imo. There's no other sound like it. If the new ones don't have it, I'll stick to old ones.

[@krselj]

Finally remembered who the host reminds me of. It is the singer of blink 128 lol.

[@subarnosinha8042]

An often made mistake is to consider Boxer and flat engines one and the same, when they aren't actually. In a flat engine (not a boxer), a pairs of pistons share a crankpin. In a true boxer engine, every piston has its own crankpin. The result of the boxer motor’s use of individual crankpins is that the pistons on either side move opposite one another, which helps to cancel out engine vibration. The back-and-forth motion of the pistons resembles the punches of a boxer, which is where the engine gets its name.

[@Gameplayery]

Direct Injection has also bad side , at cold temperatures the gaz can by-pass the piston rings and drop into the oil pan, mixing Oil / Gaz for oil dilution. This was a MAJOR issue in Honda's GDI "Earth Dreams"

[@Sovereign86]

That little “Woo!” at 3:15. 😁 [Everyone liked that]

[@BenJustSaid]

It's like Mazda has done with their entire fleet in recent years. They all use the same 4 cyl engine, some are 2.0l others are 2.5l, they have different tunes + turbo according to the job they're supposed to do, and engine placement in the bay (some are facing sideways, others are forward) and that's how they get different power.

[@edugj23]

Most of nowadays engines are built this way, that's why an ECU remap is so effective, sometimes the only difference between two models is the electronic configuration.

[@messmeister92]

That’s what Subaru used to do. The problem is engines that are made to do everything usually don’t do any one thing particularly well. The EJ is a great example of that. There’s also a reason you don’t find aftermarket turbo kits for current Mazda engines, and there aren’t a lot of bolt ons for the current Miata: the engines aren’t made to handle that.

[@jzendler]

Anyone else really want that sleeper crosstrek 👀🔥🔥🔥🔥🔥

[@KOdi766]

Also a sleeper Impreza...

[@SC87Returns]

That would be awesome :)

[@electric_boogaloo496]

Not with the crappy CVT.

[@MapleSyrup89]

i love the way you guys broke this down and made it educational instead of just stating the facts

[@rgbigdog]

Not only the dual fuel injection system is good for cold starts but it also helps to reduce carbon build up on the intake valve.

[@holzwurm_hd7029]

My favorite 4 banger is the V4 from the Porsche 919

[@SirLoinOfsteak85]

Mine is the V4 from the Lancia Fulvia. :)

[@Matthewsminimodels]

You didn’t say the biggest downside to DFI (direct fuel injection), the fuel won’t be cleaning the intake manifold anymore which means you will have to walnut blast these engine around 70k-90k miles. kinda expensive process

[@derekrobertson9583]

400 bucks.......

[@Matthewsminimodels]

Derek Robertson Probably more then $400 for a brand new horizontally opposed boxer but idk

[@pfeifer7347]

and what cause the dirt? Exhaust Gas Recirculation Valve.... and a little the oil gas from the motor itself.

[@discomfortzone]

It’s great to see Tom DeLonge (ex Blink 182) doing stuff again. Keep it up mate.

[@matthew4904]

I think you're HP quotes are a little off. You specified 400 to the wheels and said it's 90 more than the current STI but the factory power isn't measured at the wheels. I think stock STIs are more in the 270 range at the wheels stock.

[@barsaf9989]

Ture. Except in 2019 they modified the ej257. Many people report dynoing stock sti's at a little less than 300whp.

[@ruturaj47]

A year later, sadly, STI is dead but BRZ did get the engine (- turbo) and dual port injection.

[@MickehPuppeh]

Are people actually mad about this evolution? It's still a flat four. Still has character.

[@Jsiano91]

I'd say it's an upgrade but I hope they put bigger cams tho if they want to make more power for the sti

[@That-guy0801]

Janrey Siano sti heads r ported

[@Jsiano91]

@@That-guy0801 yes they are but the guy just said they might do direct or ported injection, maybe both just like the brz. I'd say do direct because its efficient but less durability on it

[@kyleshelton1636]

Doesn't direct injection without port injection also tend to mess up valve seats as well after prolonged use?

[@subie-ja8083]

Walnut blast every 30k miles. And an AOS. Problem solved.

[@kyleshelton1636]

@@subie-ja8083 port and polish while the motor is out.

[@subscribetomeoriwillstealy2568]

Imagine If donut media races carwow and doug demuro That would be sike

[@keithparker865]

I'm glad I subscribed to your guys' channel now, not only do I understand why the new Subaru STI motor is better than its predecessor, I also have a much better understanding on how a motor works in general. Props to you guys at Donut!!!

[@TheKrisBunch]

Subaru keeps making the STI better and better. I currently own an Outback 3.6r cause I need the DadWagon. But as soon as my kids are off to college I will be getting an STI. With all the improvements I am happy to wait for that day!

[@arushs121]

except for the exterior.

[@The333Wanderer]

KZbins new way: 100% commercials with a moment or two of content.

[@muslimtommyshelby2624]

Little did you know the "ej" engine was first released in a legacy not WRX "THE MORE YOU KNOW"

[@turbodan78]

And an H6 is an ej design with a couple of extra cylinders-pistons

[@OvernightCrew]

B2B is great to watch when you wanna take a break James screaming at the top of his lungs

[@Chefheezy]

People love to shit on Jeremiah but you can tell dude is putting his heart and soul into making this series not only accessible and friendly. but fun as fuck too. Love this guy. Somebody buy him an FA Subie

[@damionlabounty7116]

In a 10-1 engine with 15psi boost your compression pressure at tdc before spark would be closer to 300 psi not 150, when calculating the compression pressure with boost you have to account for the fact that atmospheric pressure is about 14.7 psi at sea level so 14.7+15 is 29.7 x 10 would be 297psi, you won’t get all that with losses so if you know the volumetric efficiency you could get a true number

[@ANSWERTHECALLOFJESUSCHRIST]

Donut, please, PLEASE give mad props to the person who makes the animations. All those little details make the videos even better. Also, Jeremiah is a cool cat! I really enjoy him as a presenter. 😎👍

[@anthonyszeto5508]

I have a feeling deposits forming at the valves. Since there’s no fuel to clean the valves.

[@Hallowsaw]

Its really not hard to do a valve service every 50k miles.

[@kevingroover]

I suspect the new fa24 will be a dual injection system thus cleaning the back sides of the intake valves and cooling the air charge

[@kevingroover]

They've already got it in the fa20 naturally acid aspirated BRZ engines it would not be a challenge to Port over to the fa24

[@uncleren]

@@Hallowsaw why should we pay money to fix faulty technology?

[@jay0kh0]

Reni N it’s maintenance 😐 part of the cost of ownership

[@ratzikratzi]

"Hang on....That, is the sound of a turbocharged flat 4 engine. A sound, which all over the world, heralds the imminent arrival of a moron."

[@kaweesiakram1195]

Jeremy Clarkson

[@kaweesiakram1195]

Jeremy Clarkson

[@jeepmanxj]

You can't tell the difference between the sound of a 2015+ wrx and any 4pot because Subaru finally got rid of the unequal length headers.

[@skidtechracing8674]

It looks like you Hammond all surprised, A Tree!! A house!!! A rock!!

[@losersseekhelp]

User Name 🙄🙄 false

[@FoxMacLeod2501]

@3:45 I'm sure what you meant to say was "intake runners" here, before describing exactly what the word "runner" is describing in that context. To be a total tool, I'll add this: @5:25... decidedly *not* literal. I don't mean this to be rude, I just prefer clear communication, and I want my favorite automotive KZbin channel to be the best it can be. Love you guys!

[@ohio737pro]

Well Im sold.. Im going to sell my Focus ST and put it towards a new subi i want 2022 with this new FA engine.. Bolt ons and a tune and im over 400HP without having to really do any major work.. hell yeah.. I want white with red or black accents and manual trans..

[@sephiros9883]

“DFI is better for the engine” *TSI Engine has entered the chat*

[@bradleytait3855]

*cries profusely in fsi*

[@TheRealMikeWilly]

Wondering wtf y'all are talking about while I rebuild these twin Solex carburetors.... Shit where did that spring just fly off to?

[@danbjuliano626]

confused SBC noises

[@theroyalcrownedtiger2946]

Direct Fuel Injection ( DFI ) / Gasoline Direct Injection. ( GDI )

[@doabarrellroll69]

*Laughs in Toyota D4-S*

[@TheDarknessConsumesMe666]

3:07 - wait, no subie rumble? No está bien

[@somedudenamedryan]

I love subie rumble as much as any other subie bro, but for 400 buff horses straight out of the box ill forget about it real quick

[@VonGeggry]

They still have a little bit probably. But that rumble is pretty inefficient.

[@1MotoXRacer1]

It will still have a boxer sound, trust me. I've done equal-length headers on EJ25 blocks and they definitely don't sound close to a Honda. It's like the Subie rumble without the question of "is that a misfire?". Also cylinder 4 says thank you with ELHs... UELs makes Cylinder 4 get significantly hotter than the other cylinders, and makes it harder for it to get rid of the exhaust gasses. Making it harder to spin the turbskie. Turbskie not spinning as quickly means LESS powa babeh. And no one likes gimped horses. We want them buff horses. Go ELHs if you're making more than stock power, especially.

[@jai_co4713]

Vladimir72 I felt that, but it’s not the same 😪

[@ChiSpire]

@ The Darkness, you can still get the rumble with the current generation, that’s what I did I have a 2016 STI that I’m keeping for life. Eventually I will also get the new STI, so you can have the best of both worlds.

[@sato.studio]

Day ♾️ of asking for what everyone is asking for aka: up to speed on your cars.🙂

[@skepticalskeksis221]

I drive a 2015 STi with 404hp & 480ftq everyday. I have 30K miles on that time and it’s a peach. It’s as simple as a high-quality AOS equal length headers and a flex fuel kit. Those three mods alone will lower the chance of detonation significantly. E85 is the most important one of the three as it really cools down the cylinder walls every time the injector spray. That’s really why E85 is able to make so much power. Last but not least get a proper pro tune and you should be fine like me. I’m running 23.5 psi of boost and when I do my data logging by way of a Cobb acsessport I’m not seeing any knock. Knock on wood

[@kbonics25]

When I bought my 13 BRZ people joked that it was lacking power. My response was always the FA-20 engine is better than the EJ equivalent (WRX engine). Glad Subaru finally got things up and going on the new FA series engines for its tuner/badass soccer mom platform

[@Dexter-zd5pr]

I’m so excited to see what the Sti comes out with

[@Turshin]

Congratulations Subaru. You've finally made an engine that's just as strong as my 30 year old 6bolt 4g63t.

[@martinkolar5716]

Subaru in couple years: "hmm, too much valve float even with this new spring, lets do some coop with Ducati" 2028: Subaru WRX STI Desmosediciru.

[@nix294]

Put in a V4 instead of a flat 4

[@kawasakieddy61]

The issues with DI is when you run out of fueling you have to go with port injectors to make more power in the Mazdaspeed 3 you needed them to get over 450 hp

[@MastinoNapoletano420]

I'll be honest, at first I thought you weren't going to make a good host but the more I watch you the more you own this show. Great vid Jeremiah, looking forward to next week :)