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4.0 V6 Differences

Discussion in '2nd Gen. Tacomas (2005-2015)' started by coolreed, Aug 11, 2010.

  1. Aug 11, 2010 at 12:21 PM
    #1
    coolreed

    coolreed [OP] Well-Known Member

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    I noticed the Horsepower Differences in the 4 Liter V-6 Toyota engines. I saw 235 HP in my 06 Tacoma and 265 HP in another Toyota 4WD FJ and now I hear there is a 270 HP 4.0 V6 coming out.

    I wonder what exactly is the difference in the engines that give a higher HP rating. I may want some of that. :cool:
     
  2. Aug 11, 2010 at 12:34 PM
    #2
    Jester243

    Jester243 mod status????

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    I think dual VVT-i
     
  3. Aug 11, 2010 at 2:35 PM
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    bagster

    bagster Well-Known Member

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    I wonder what the difference in gas mileage will be?
     
  4. Aug 11, 2010 at 3:15 PM
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    JKD

    JKD Well-Known Member

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    Look up a 2005 Tacoma 4.0. ;)
     
  5. Aug 11, 2010 at 3:19 PM
    #5
    NAAC3TACO

    NAAC3TACO Just east of crazy

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    The new 4 Runner 4.0 is rated at 17 city 22 highway. Those are the same numbers as my 2008 2.7L Tacoma.
     
  6. Aug 11, 2010 at 3:25 PM
    #6
    Jason'sLawnCare

    Jason'sLawnCare Prepared for Bambi

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    They are 245hp and I think it's because they are rated with premium gas as that's what's required/suggested. I think that the later ones are rated with 87 gas and that's why they are less. I believe that the newer one would have the same power if premium is used. This is they theory I believe.
     
  7. Aug 11, 2010 at 3:29 PM
    #7
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    THey changed the way the reading were taken. Nothing is different between an 05' 4.0, and an '10 4.0, hp wise.
     
  8. Aug 11, 2010 at 3:38 PM
    #8
    KenLyns

    KenLyns Lord of War

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    A few things of note.

    1. The FJ Cruiser's current 260 hp / 271 lb-ft rating is on 91 octane, while the Taco's 236 hp / 266 lb-ft rating is on 87 octane. Put 91 octane and the ECU will advance ignition timing and achieve 239 hp / 278 lb-ft. So the Taco puts out more torque.

    2. There was a change in SAE hp testing method in 2005 that caused a small drop in hp ratings across the board. If you find a 2005 Taco brochure, it may claim higher hp than the 2011 Taco.
     
  9. Aug 11, 2010 at 3:48 PM
    #9
    KenLyns

    KenLyns Lord of War

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    I read it here:
    http://en.wikipedia.org/wiki/Toyota_GR_engine#1GR-FE
    Obviously not all engines automatically produce more power with premium fuel. The Taco's ECU is supposed to recognize premium fuel and adjust timings accordingly. Whether you can feel that extra bit of power by seat of the pants is debatable. I think dyno runs would be needed.
     
  10. Aug 11, 2010 at 3:57 PM
    #10
    myname150

    myname150 Well-Known Member

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    Im pretty sure the 270HP is due to the addition of Dual VVT-i.

    Currently the tacoma doesnt have that, and i think the FJ doesnt have it either. Only the new 4Runner.
     
  11. Aug 11, 2010 at 4:15 PM
    #11
    KenLyns

    KenLyns Lord of War

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    12 lb-ft is less than 5%. I don't think its noticeable by feel even if you ride two trucks back-to-back in identical temperature / wind / altitude.
     
  12. Aug 11, 2010 at 4:18 PM
    #12
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    The FJ was tested on 87 octain fuel. Its also a dual VVT-i engine.
     
  13. Aug 11, 2010 at 4:19 PM
    #13
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    My manual states exactly that. "FOr best performance, use 91 oct. fuel".
     
  14. Aug 11, 2010 at 4:25 PM
    #14
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Could be. I noticed a godd difference when testing different grades of fuel.
     
  15. Aug 11, 2010 at 4:25 PM
    #15
    Tobogan9610

    Tobogan9610 Member

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    5% is a noticeable improvement
     
  16. Aug 11, 2010 at 4:29 PM
    #16
    Tobogan9610

    Tobogan9610 Member

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    Wikipedia is not a reliable source.

    You have to look at the proof of where the information comes from. At the end of any information that is put on Wiki you need to look for the footnote and then go to that information to find out if it is bunk or not. If there is no footnote (proof of information) then the info is most likely bunk.
     
  17. Aug 11, 2010 at 4:34 PM
    #17
    Tobogan9610

    Tobogan9610 Member

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    It is not reasonable for the horsepower to go up 3 and the torque to go up 12 without some change in the exhaust or intake.

    Just changing the fuel usually results in relatively equal increases by percentage. For instance, in a diesel you may have 200hp and 400ft-lbs. If a more high performance fuel is used the increase would look like 10hp and 20ft-lbs (a 5% increase).
     
  18. Aug 11, 2010 at 4:40 PM
    #18
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    HP is just a number. Torque is the actual work being performed. Yes, it is reasonable for the torque to go up 12, and hp to only go up 3. Look at where the torque is produced. HP = Torque x RPM / 5250. If the torque is boosted in the lower range, and flatens out near the top end (where the HP number comes into play), then the HP gain may not seem like much, despite the boost in torque.
     
  19. Aug 11, 2010 at 5:48 PM
    #19
    coolreed

    coolreed [OP] Well-Known Member

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    I read somewhere on the Taco Forum that the 2011 would have more HP and get redesigned. I looked on the Toyota web and it seems here are really no changes to the 2011 model. HP is listed as the same.

    But I was just curious how they were obtaining the extra HP in the FJ with the same engine. I thought maybe they used different cams or exhaust or intake.

    Thanks for the replies.
     
  20. Aug 11, 2010 at 8:26 PM
    #20
    dexterdog

    dexterdog My pee parts itch

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    FJ and the new 4Runner get dual VVTi which adjusts the timing on both the exhaust and intake camshafts. The Tacoma only has VVTi which only adjusts the timing on the intake camshaft.
     
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