2JZ ENGINE – How it Works | SCIENCE GARAGE


(engine roaring) – Supra, ever heard of it? (engine roaring) For 25 years now, it’s been JZ this, and JZ that, but what is so
special about that 2JZ engine? (techno music) First, a little background. Toyota makes a whole family of inline six cylinder
engines called JZ’s. How Toyota names all their engines is actually really interesting. You should look that up sometime later. But we’ll talk about what we
need to know for the 2JZ GTE. Anyway, there are three 2.5 liter inline six engines called 1JZ’s, and there are three three
liter variants called 2JZ’s. So there’s the first reason
why the 2JZ is pretty popular. The larger displacement of three liters simply means more horsepower
than a 2.5 liter engine. And who doesn’t want more horsepower? I want more horsepower.
(man screaming) In the late 1980s and early ’90s, bad car accidents were
getting out of hand in Japan and everyone there thought
that speed was a major factor. So Japanese domestic market automakers made an informal promise to each other that they wouldn’t sell any cars with more than 280 horsepower. It was called a gentleman’s agreement, and it was ignored by
everybody pretty quickly. Much the way Nolan repeatedly ignores his gentleman agreement to
pay me back for monies owed. – [Eddy] Hey, hey, Bart? – What’s up Eddy? – [Eddy] What about the RB? – RB, yeah dude, I love Arby’s! You go get me a Big
Montana, I’ll keep rolling. Look, everybody knows,
speed doesn’t really hurt, it’s the sudden stops that get you. At the same time, automakers all promised not to jump into a horsepower war, the exchange rate was really
favorable for the end. If you’re an econ kinda car nerd, check out James talking about the LS- – 400!
(air horn blaring) – But in Japan’s recession, it wasn’t a big stretch
for Toyota to spend a lot of money on an engine development
and quality materials. So that’s what Toyota
did, and as a result, they ended up with some overbuilt engines that could easily make
over 280 horsepower angle. They were built so well, they could make double
or nearly triple that without having to do
significant engine work. The Toyota 2JZ GTE engine is the most notorious example of this. At its core, the 2JZ GTE is a twin turbo, three-liter inline six cylinder engine with an iron block and an aluminum head. So, 2JZ, three liter inline six. G, performance wide-angle
valve dual overhead cam. T, turbo charged, E,
electronic fuel injection. Those are all very good things to have if you wanna make more horsepower. Both fuel injection systems and turbos are pretty easy to tune and upgrade. And since it’s an inline six, the primary and secondary
forces that are generated by the movement of the pistons cancel out, making it a naturally
smooth-running and balanced engine. It also leaves extra
space in the engine bay to get your hands dirtier
and install bigger turbos. If you wanna know more about
all that stuff I just said, check out our episode on
inline six versus V6s. American market Supras were
sold with bigger fuel injectors, stronger turbos, and
different cams than JDM cars. That helped them make 320 horsepower at 5600 RPM, and 315 foot
power of torque at 4,000 RPM. In it’s stock form, the 2JZ
uses a sequential turbo setup. The first turbo spools up around 1800 RPM, and then the second turbo starts
making boost around 4,000. This kind of setup reduces turbo lag, but to make the biggest
horsepower numbers, tuners swap the twin turbo
setup for one big turbo. And that sacrifices the spool up time, but a bigger turbo can make more boosts than two smaller ones. And that helps the engine make peak power. Making more power is pretty dang easy. The upgrade to a better flowing intake, better flowing exhaust,
a big single turbo, bigger front mount inner cooler to replace the stock
side mount inner cooler, higher flowing external waste
gate, bigger fuel injectors, fuel lines, fuel pump, and an ECU tune. If you’re gonna make huge power, you’re gonna need a strong engine. A lot of times, if you wanna unlock the hidden potential of an
engine, you gotta get in there. We enforce a bunch of
stuff, swap out some cams, replace all your valves
and gaskets, and you know, time consuming dirty, dirty stuff. The fact that Toyota
over-engineered the 2JZ is the main reason that it’s so easy to bolt up a huge turbo
and make 800 horsepower. The cast iron engine
block is, well, cast iron. Which is really heckin’ strong material. The block also has a fully-closed deck, and that means unlike
some other inline engines, the area around the cylinders
is completely filled in, except for some coolant passages. And that gives the block extra strength, and really keeps it from cracking when it’s running high, high boost levels. The engine’s crank shaft is made out of ultra-strong forged steel, so it can easily deal with
all those extra forces caused by making more power. The seven main bearing caps
that hold the crankshaft in place as it spins are
also massively strong. You see where I’m going with this? Straight out of a Toyota factory, the 2JZ can take a licking. Engines that are built
using more modest components would have to be torn down
to upgrade all the components that could fail under
higher stress of more power. I mentioned earlier that the
cylinder head is aluminum, which is lightweight. It helps dissipate heat much more quickly. The pistons are also cast aluminum, and they have slightly dished tops. That gives the 2JZ GTE engine
a lower compression ratio than the last popular 2JZ
cousins in the family. And while sometimes lower compression can mean lower performance, a benefit of lower
compression from the factory is that it makes it easier to
safely run more turbo boosts. Another unique feature
of the 2JZ GTE is that there’s oil squirters in the
lower halves of the cylinder. They spritz a bit of oil on the bottom of the piston to keep them more lubricated and reduce friction. There’s over twice as
many lubricating ports in the 2JZ compared to some
of it’s newest competitors. At high engine speed, that helps keep the engine temperatures a bit cooler and help keeps the pistons lubricated so they don’t break down. Jeez, check out our video on engine oils to absorb more info on that. (light drum music) Man, that’s gotta be it,
that’s so much stuff. No wait, there’s more! (children cheering) This engine’s also got
a high capacity oil pump and a cooling system, do
you see where I’m going? The engine is made to
withstand mind boggling abuse. (engine roaring) JDM Toyota’s got
variable-valve timing in ’98, but the US didn’t. You wanna know more about valve timing? Check out the video on V-Tech. Turns out, people are just
fine with the Non-VVT2Js because it’s a non-interference engine. So, if you’re running at 6,000 RPM and a timing belt breaks,
a non-interference engine means the pistons won’t
smash up into your valve. With variable valve timing, it doesn’t always know
that the belt broke, so the piston still driving up, the valve might be pushed down to open and, kaboom, you got a bent valve. The non-VVT2JZ is not a valve bender. Which means if the belt
breaks or you skip a tooth, you don’t gotta get inside there
and replace all the valves, which is both pricey and time consuming. So why all the love on the 2JZ GTE? It was a beautifully designed, over-engineered cast-iron behemoth that, because of it’s inline design,
is somehow still elegant. It feels like the engineers designing it took into consideration
every possible condition that could damage an engine, and they designed around all of them. They created a nearly
bulletproof inline six, and people love it so much that there’s immeasurable
aftermarket parts forums in assistant if you wanna
start working on one. We’re all jazzed up ’cause
there’s some cars coming off the line in the last few years making ballpark 800 horsepower. There have been 2JZ
reportedly boosted and tuned at six, seven and, yeah,
even 800 horsepower with stock internals, and even more when you swap out them jugs. 2JZ engine, subscribe to Donut, guys. It’s how we get to do such
awesome stuff for you. Means a lot. We got new merchandise in our store. Go to shop.donut.media
and check out this video from James on the Supra. You know him from behind the camera, check out Eddie in front
of the camera, en prostato. Follow us on Twitter and
Instagram at Donut Media, and follow me at BidsBarto. Don’t tell my wife I
2JZ swapped everything.

100 thoughts on “2JZ ENGINE – How it Works | SCIENCE GARAGE

  1. We know we can't include everything… let us know what YOU love about the 2JZ!

  2. I used to work at a lumberyard, and one of the Toyota forklifts had a 5ish liter normally aspirated diesel engine. It looked so much like a 2J, but I couldn't find any label on it. Does anybody know about Toyota diesel engines? I have seen diesel to gasoline conversions before (the Oldsmobile diesel engine was a shite diesel but can take insane boost when modified for gasoline use, and somewhere on the internet is a Duramax converted to be a twin-turbo E85 engine) and I was thinking a five-liter 2J would be the tits.

  3. So what your saying that the supra 2jz engine is a very cool and good car

  4. Anyone wanna help build my fat family car Supra ( 2001 Lexus Is300 ) CashAppMe : $johnynocash

  5. i remember when i was a kid i wanted to make a car called the supra. as soon as i found out about the supra i was disappointed but i was also not disappointed lmao

  6. Biggest dream is too 2jz my 2015 Subaru wrx later in the long run im still young but learning little by little.

  7. The first video from Bahrain kanoo Supra I think it’s the fastest Supra in 1/4 mi 😍🔥

  8. So…. What if you have a 1M hp And 9,562(just picking random numbers) Torque… What will happens?

  9. could i throw a 2jz GTE in my MK3 Supra? and then modify the fuck out of it?

  10. Easiest Know For 2JZ : An Engine That Can Puts out 1000HP That Can Easily Scares You Just A Lanuch 🤣😂🤣

  11. 50 percent of the video was filler.
    The other 50 was already known facts about the engine, delivered at a talking speed of someone with brain damage, in a tone that made it seem as if he thought his audience had brain damage.
    Btw, the pill squirters were for piston cooling. Moron

  12. Fun fact: the lexus sc300 has the exact same 2jz as the supra and the engine is behind the wheels which makes it better handling than the supra

  13. Guys I have a question. A 2jz engine always should be 3L because I hear about 3.2L 2jzs in drag races. Any car guys out their?

  14. My second car was a Toyota chaser with a naturally aspirated non-vvt 2jz engine.
    God I miss that car.

  15. And BOOM, the new supra come up with BMW Z4 engine, F*CK YOU toyota

  16. (2JZ-GTE)=crazy inline6 engine in the world and fastest inline6 in the world

  17. IT’S CALLED A BMW N54 3.0L I6 TT LMFAO STOCK BLOCK 800HP POSSIBLE WITH SINGLE TURBO SWAP WAKE UP GUYS

  18. This on up to speed on the GTE, would’ve been nice for him to talk bout the GE variants and how to turbo those and the differences between the two 😪

  19. Car owner: How much boost do you want to run
    2JZ : All of it

  20. Well the 6.0 V8 f350 Turbo diesel just took a shit so I'mma swap it out with a to 2jz GTE pumped up to 800hp

  21. None of this is true, the 2jz is just a magical engine built by wizards😂😭 great vid tho.

  22. Greatest inline 6 ever, third greatest engine ever, right after the Big Block Chevy and the LSX Chevy.

  23. All engines are not build equally the supra v6 is just too fucking Savage.

  24. This guy is way better than the main one. The videos are interesting but the guy with the colored hair does too much and it makes it hard to watch,

  25. donut: 2JZ spritzes the engine and has high grade material to withstand all kinds of punishment not to mention countless other shit to make it work
    tesla: LOL

  26. It’s not the speed that kills. It’s the instant stop.

    Accurate as fuck

  27. After Supra 2020 released youtubers, other people trying to switch to 2jz swap
    Toyota: Pathetic
    BMW engineers: Pathetic

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