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Enough Already! Your Truck's T, HP and RPM Explained

Discussion in '3rd Gen. Tacomas (2016+)' started by hiPSI, Oct 24, 2018.

  1. Nov 11, 2018 at 11:53 PM
    #281
    NMTrailRider

    NMTrailRider Well-Known Member

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    My thoughts exactly. Can it do a four hour drive at 80mph on the interstate? Sure. But it feels like you're doing it in a 4 banger. Add some head-wind and it's miserable. My 2nd gen didn't feel that way at all. It wasn't a race car but it was a hell of a lot better than the 3.5. My 2 cents.
     
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  2. Nov 17, 2018 at 8:24 AM
    #282
    MOC221_

    MOC221_ 3rd Gen GinGer StepchilD

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    You're up against the transmission, ECM calibration and gearing more than you are the engine itself. For example, the sweet spot for my M/T is 70mph, or right around 2500rpm in 6th. I'm going to burn a boatload of fuel doing 80, but the truck will happily do it.
     
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  3. Nov 17, 2018 at 8:37 AM
    #283
    stun gun

    stun gun Has tardigrade DNA

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    It’s not a mystery why these trucks perform differently for different users. And it’s not a mystery why Toyota doesn’t “unleash the full potential” of the engine. Toyota’s game has always been modest power, lifelong engine. This new engine is modest power, better gas mileage. It was never meant to impress people at stoplights... people who need that, are confused, and should have bought something else.
     
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  4. Nov 17, 2018 at 8:48 AM
    #284
    Vanderjdm

    Vanderjdm Well-Known Member

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    Lol. Your theory applies to me for sure. I had a really hard time getting used to this at first.... I came from a 300hp sports sedan.
     
    hiPSI [OP] likes this.
  5. Nov 17, 2018 at 9:36 AM
    #285
    MOC221_

    MOC221_ 3rd Gen GinGer StepchilD

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    While I get what you're saying, you're kinda oversimplifying the power/driveability "issue" by stating that the people who complain have unrealistic expectations and should have bought something else. Some of these trucks DO perform worse than others. We've seen it time and again working with OVtune. BTW, the 87 Octane tunes do not add additional HP/torque. They do however, change the driving dynamic - especially in the case of the A/T trucks. Hell, even Toyota's updated M/T calibration (04B13 in my case) turned out to be far better than what my truck shipped with in the fall of 2015. Does this mean that Toyota just messed with my engine's durability, mpgs etc? They did it for a reason..
     
  6. Nov 17, 2018 at 9:58 AM
    #286
    NMTrailRider

    NMTrailRider Well-Known Member

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    Makes sense. Yeah, i was getting 12-13mpg at 75-80mph with a slight wind on the interstate. I think because it was constantly running in 4th gear.
     
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  7. Nov 17, 2018 at 10:03 AM
    #287
    MOC221_

    MOC221_ 3rd Gen GinGer StepchilD

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    What were your rpms in 4th at that speed?
     
  8. Nov 17, 2018 at 10:15 AM
    #288
    stun gun

    stun gun Has tardigrade DNA

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    You could be right about me oversimplifying the case.
     
  9. Nov 17, 2018 at 11:44 AM
    #289
    NMTrailRider

    NMTrailRider Well-Known Member

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    I think around 3400-3500rpm, if I remember correctly.
     
  10. Nov 17, 2018 at 12:52 PM
    #290
    KkelX4

    KkelX4 Well-Known Member

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    I don't know how you can expect longevity out of a transmission that shifts as erratically as the stock one. Constantly running to sixth when it can't hold it down, then jumping to 4th to try and keep up. Stuttering along like it's running on 4cyl.

    It's crap. There's no excuse. The power is there. The longevity is still there. This tune were left with is what happens when engineers are put up against a solid deadline, and when corporate says changing it would be akin to admitting a mistake was made.
     
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  11. Nov 17, 2018 at 1:12 PM
    #291
    stun gun

    stun gun Has tardigrade DNA

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    Oh my tranny is most definitely going to outlive this truck. Without a doubt, and it shifts AMAZING. To be honest, I think it’s because the shift controller is a genius.
     
    hiPSI [OP] likes this.
  12. Nov 17, 2018 at 1:52 PM
    #292
    KkelX4

    KkelX4 Well-Known Member

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    Haha... I should have got a manual.
     
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  13. Nov 17, 2018 at 1:53 PM
    #293
    stun gun

    stun gun Has tardigrade DNA

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    But yeah I get what you’re saying. Who knows though? Maybe it will last. So far I personally haven’t heard of any taking a shit. Just that they feel shitty.
     
  14. Nov 17, 2018 at 3:33 PM
    #294
    KkelX4

    KkelX4 Well-Known Member

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    I heard about one failure, but it was mechanical factory defect not from normal use.
     
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  15. Nov 17, 2018 at 7:20 PM
    #295
    monkeyface

    monkeyface Douchebag, or just douche if we're friends

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    I've seen the torque curve with this Otto/Atkinson 3.5l Toyota tried to introduce with the Tacoma, and the problem seems to me is the big torque dips. There's a big dip ~ 2500-3100 RPM, then another big dip ~ 4200-4800 RPM. The Otto/Atkinson cycle was supposed to be a great innovation and the Tacoma was the first implementation.

    Do I have that right? The Tacoma was the test mule for the 3.5l Otto/Atkinson engine?
     
  16. Nov 17, 2018 at 7:52 PM
    #296
    KkelX4

    KkelX4 Well-Known Member

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    Yeah pretty sure, but the Atkinson cycle in this isn't true Atkinson cycle. It's some fancy valve magic.

    Your right though, the biggest issue is the lack of down low available torque. If they'd gone with a 4:30 gear ratio for the a/t off the bat, pretty sure this thread wouldn't even exist.
     
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  17. Nov 17, 2018 at 8:11 PM
    #297
    NMTrailRider

    NMTrailRider Well-Known Member

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    The problem, I think, is that if you "correct" that torque dip at 2500-3100, gas mileage is going to suffer. It could be a 1-2mpg decrease, depending on driver and driving conditions. And then the truck will no longer match up with the city/hiway mpg specs. I wouldn't think they could offer a "tune" (tsb) that puts the truck outside of the mpg specs.

    I just don't think they'll be able to correct this without "stealing" some mpg (torque) from somewhere else on the curve. And they've already got it upshifting as fast as possible.
     
  18. Nov 17, 2018 at 8:19 PM
    #298
    ritrawler

    ritrawler Member

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    Wasn't this Atkinson cycle proven in Lexus vehicles prior to it's use in the taco?
     
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  19. Nov 17, 2018 at 8:20 PM
    #299
    monkeyface

    monkeyface Douchebag, or just douche if we're friends

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    I think you're right.
     
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  20. Nov 17, 2018 at 8:26 PM
    #300
    shakerhood

    shakerhood Well-Known Member

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    I honestly thought it was used on the Prius, didn't realize Lexus too.
     

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