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When will the Tacoma get the 4.0 Dual VVT-i?

Discussion in '2nd Gen. Tacomas' started by Scott K, Oct 18, 2009.

  1. Oct 18, 2009 at 1:24 PM
    #1
    Scott K

    Scott K [OP] Well-Known Member

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    Toyota just came out with a new 5th gen 4runner with a revamped 4.0 V6 with Dual Variable Valve Timing that puts out 270 HP and 278 foot pounds of torque. This revamped engine is now on a level footing with pretty much every other engine in other Toyota vehicles now, where , each engine has Dual Variable Valve Timing that enhances HP, TQ Curve flatness, and fuel efficiency compared to previous engines with single (intake) variable valve timing. Well, except the Tacoma, and the Yaris. The Tacoma lags behind the rest of the Toyota line up with what is now hopefully dated technology with single variable valve timing.

    Yes, the TAcoma is a potent performer as is, but when will Toyota bring the engine technology in the Tacoma up to par with the rest of their cars, trucks & SUV's?
     
  2. Oct 18, 2009 at 2:00 PM
    #2
    K5423

    K5423 Well-Known Member

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    I'd rather have the tried and true 4.0 that's in my 2010 then a brand new designed motor.
     
  3. Oct 18, 2009 at 2:09 PM
    #3
    SubZombie

    SubZombie Well-Known Member

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    I don't think the Dual VVT-i is anything to get too excited about. Its nothing new at all, was around in the 90s.

    The reports of the 2010 FJ cruiser with the dual vvt-i have the 0-60 times being either the same or slower than the 2009 which had what we have. The gas milage ratings are the same or 1mpg better in the best case.

    Not to mention those 4runner numbers call for premium fuel and the ratings for the current tacoma v6 with premium fuel are 245HP and 283 pound-feet of torque...

    When it does come we might get 1 or 2 mpg better and performance most likely on par with what we already have.

    I'm also 99% sure its not a newly designed motor, its the exact same motor with added control over the exhaust timing...
     
  4. Oct 18, 2009 at 2:19 PM
    #4
    gcwaterski

    gcwaterski Well-Known Member

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    I'm sure it will be in the next gen. taco :) Why would it not be if its in everything else?
    I really like the new design of the 4runner. I am quite sure the new taco is going to be badass. But I am still gonna keep my 2nd gen.
     
  5. Oct 18, 2009 at 2:19 PM
    #5
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    The VVT-i 4.7 get 270 hp. The Dual VVT-i 4.6 gets 310 hp. You don't call that a significant improvement?
     
  6. Oct 18, 2009 at 2:23 PM
    #6
    SubZombie

    SubZombie Well-Known Member

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    Thats the tuning of that engine on the 4runner...

    The same dual VVT-i engine on the FJcruiser has 258hp and 270ft/lbs... (still talking premium fuel)

    Say we have 245hp/283ft/lbs, all the numbers on premium, its as much about tuning for the specific vehicle as anything.



    Also the 4.6 ltr's big advantage isn't the dual vvt-t. Its a completely new engine than the old one and runs at a higher compression ratio.


    And after looking into it more the new 4runner and the new Fj reach their max hp/torque at higher RPMs than we do.

    The gain is probably as much due to playing with the fuel curves as anything. The dual vvt-i is probably more about the 1-2 extra mpgs.


    Ofcourse its welcome and nice to have, but its nothing to get excited about because the numbers aren't much better when its all said and done.
     
  7. Oct 18, 2009 at 2:41 PM
    #7
    gcwaterski

    gcwaterski Well-Known Member

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  8. Oct 18, 2009 at 3:21 PM
    #8
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    245 hp with premium??? How do you figure?
     
  9. Oct 18, 2009 at 3:32 PM
    #9
    SubZombie

    SubZombie Well-Known Member

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    Thats the advertised ratings for the 2005 tacoma, when they called for premium fuel. Starting in 2006 the changed the ratings and changed the recommended fuel to regular unleaded.

    I had a press release from the time but the link won't work now.

    It stated premium fuel was recommended, and was required for full performance at advertised spec, but lower octane fuel could also be used.

    In 2006 they dropped the whole premium thing, there was alot of bitching about it in the early days of the 2005 model, and when they did they dropped the specs aswell.
     
  10. Oct 18, 2009 at 3:33 PM
    #10
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    Well...They are rated at 239hp 278 torque on premium, and 236hp/266tq on 87 with the new rating system.
     
  11. Oct 18, 2009 at 3:36 PM
    #11
    awoit

    awoit Well-Known Member

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    not to guide away from the issue but...for people that arent too knowledgable in the mechanics, what exactly differs between single and dual vvt-i? not really sure what it has to do with :confused:
     
  12. Oct 18, 2009 at 3:37 PM
    #12
    SubZombie

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    Well thats fair enough, my numbers were from the window specs advertised at the time.



    "Dual VVT-i takes conventional VVT-i a step further by varying not only the intake camshaft timing, but the exhaust timing as well. In essence, it continually adapts to the driving conditions so flexible driving performance is maintained while fuel economy and exhaust emissions are constantly managed to provide an excellent balance between performance and economy."

    Its biggest advantage is reduced hydrocarbon emissions. Then it slightly improves fuel economy. As far as performance, I just don't think it does much other than allow them to eek out a tiny amout of performance at around the same MPGs by altering the fuel curves.

    Can probably get the same performance with a URD MAF sensor calibrator which has a dyno proven 15hp gain on a stock v6 tacoma.
     
  13. Oct 18, 2009 at 3:38 PM
    #13
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    Dual VVT-i has variable cam timing on both intake AND exhaust valves.
     
  14. Oct 18, 2009 at 3:39 PM
    #14
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    The current 1gr-fe has VVT-i on the intake cam/valves only.
     
  15. Oct 18, 2009 at 3:41 PM
    #15
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    The theory is to increase scavenging capabilities.
     
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