I heard that Toyota Supra has this engine and its good, why? And is it better than the comparable BMW Engines ?

  • mucheffort@alien.topBEnglish
    0·
    10 months ago

    Fun Fact: Toyota farmed out the development of the 2JZ to the same people that designed the BMW S54 (Johann A. Krause Maschinenfabrik)

  • SpeedySpartan@alien.topBEnglish
    0·
    10 months ago

    Before I start, the Toyota/Yamaha 2jz is a great engine. If it wasn’t, it wouldn’t be relevant nearly 20-30 years after it’s creation. As others have said, it will easily hold 600hp, and max at ~800hp which is fantastic. Some have claimed to make 1000hp stock, but it is a ticking time bomb or a factory freak at that point.

    The reason for it’s strength? It’s a goddamn tractor motor, and it’s built like one. Inline 6’s are naturally balanced. Forged assembly rod and THICC ASS cast iron block give it it’s strength. VVTI helps boot power down low for response, but some like to delete it when they get serious. The problem that no one talks about is the fact that because of all that, it weighs 595lbs, while an LS3 6.2 V8 weighs 418lbs. It’s a very simple beefy motor with not a lot to go wrong in the first place, so she handles abuse and boost very well.

    The problem I have with the 2J, are the JDM fanboys. They act like it is the 2nd coming of Christ. It isn’t. It’s a motor like every other, and is prone to failure. Look at how many 2J’s have been blown up by youtubers or racers a like. And they always shit on every other motor, like the B58. I’m a JDM guy myself, and I have to admit the B58 is the 3JZ the fanboy’s always wanted.

    With the restrictions brought on in today’s world, the B58 is really great. Semi/closed deck block that’s lightweight aluminum, forged rotating assembly with upgraded bearings for the auto start/stop function, good oiling with under-piston jets, variable valve control on both intake and exhaust cams, and a timing chain instead of a belt like a 2J. Can hold up to 800hp stock like a 2J while getting 30mpg. Fantastic.

    It does have weaknesses, like the plastic timing chain guides, the fact that the chain is on the back of the motor, or the plastic manifolds. It’s not perfect but nothing is. People complain about “german reliability this” or “it’s hard to work on” that, and it’s all bias and propaganda from JDM fans. It’s actually relatively simple compared to other vehicles. The all Japanese built Nissan Z with the VR30DETT is a goddamn nightmare to work on in comparison. There’s no fucking room to work on it, it’s a flying spaghetti monster with all the hoses and vacuum lines, and it can’t even hold past 550/600hp!

    Reliability is a myth nowadays, where I find that a lot of JDM cars have fallen in reliability to average standards. That’s a whole other rant though. Papadakis racing did a tear down day one on YT and had nothing but praise for it. Unlike all the fools that swap it for the antique 2J, they use it in their winning Formula Drift car. Take this as you will.

      • SpeedySpartan@alien.topBEnglish
        1·
        10 months ago

        Auto start/stop is a brutal process. Basically it’s similar to "cold starting’ your engine with 0 oil pressure every time you stop, since the oil pump runs off the crank (though all the fluids are up to temp already if you’ve been driving which does help quite a bit).

        ~rant time~

        Cold starts are the hardest on engines since usually all the fluids aren’t warmed up making them more viscous, the engine has not experienced any thermal expansion to the proper spec, and any oil has drained to the pan from sitting, leaving minimal amounts in the head/pistons bearings etc.

        This is why you always wait a ~30secs-1min before driving, and up to 5-10 mins before driving hard on a car, as it needs time to disperse oil, heat up components and oil, and get things to spec. It’s also why engine builders when finishing a build will pull the fuel pump fuse and crank the engine a couple times to build oil pressure before starting a new build to make sure everything is coated for first starts.

        ~rant over lmao~

        To counter auto start/stop issues, BMW coated the rod bearings with an IROX polymer that is more durable and decreases friction during this process with low oil pressure.

        I highly recommend you watch the Papadakis B58 teardown video. It is very interesting and goes into high detail + shows you everything about the motor from an experienced builder.

        Also I’m not saying the B58 is the perfect engine. It has it’s goods, bads, and uglys. From everything I have learned about it to what I have seen and what others have said, it looks really stout to me, even though I don’t have a lot of hands on experience myself.