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Different Horsepower Ratings for 05 and 06 Tacos??

Discussion in 'Technical Chat' started by MAXTacoma, Mar 14, 2007.

  1. Mar 14, 2007 at 1:55 PM
    #1
    MAXTacoma

    MAXTacoma [OP] Well-Known Member

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    :cool: Has anyone wondered why toyota has rated the 2006 taco V6 with 236 horsepower verse the 2005 taco has 245. I doubt that you can tell a difference but to me they should have bumped that up instead of down. If anyone knows why they did this I would love to know.....:cool:
     
  2. Mar 14, 2007 at 2:08 PM
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    austin-TX-Taco

    austin-TX-Taco Member

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    It's the same engine. Correct me if I'm wrong but here in the US the difference is the emissions. This emissions change reduced the HP. Was 245 and now is 236.
     
  3. Mar 14, 2007 at 2:13 PM
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    austin-TX-Taco

    austin-TX-Taco Member

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    That bull bar looks great on your truck MAXTacoma. Gives it a tough look. Do you mind me asking where you got it and how much it set you back?
     
  4. Mar 15, 2007 at 9:13 AM
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    TRDeity

    TRDeity Well-Known Member

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    Thats what I heard as well, if anyone knows how to get the HP back up to 245 please let us know. I would love to get another 10 HP.
     
  5. Mar 15, 2007 at 11:30 AM
    #5
    ForeRunner

    ForeRunner Scotch before noon. Moderator

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    Why does the 2005 Tacoma have a rated horsepower of 245 and the 2006 Tacoma only have a SEA certified rated horsepower 236? I'm guessing that is the question.

    The reason:

    In 2005 SAE (Society of Automotive Engineers) Standardized their test procedures for measuring horsepower and torque eliminating "flexibility" in power measurements. The test requires an independent observer during engine power measurement testing (voluntary)and once completed can then be SAE Certified. There is no change in the 1GR-FE engine its just the way it was tested and certified

    Hope this clears it up.
     
  6. Mar 15, 2007 at 11:34 AM
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    TRDeity

    TRDeity Well-Known Member

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    Ahhh...I was hoping to squeeze out an easy ten HP :(
     
  7. Mar 15, 2007 at 12:07 PM
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    ForeRunner

    ForeRunner Scotch before noon. Moderator

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    Not that easy on these engines without spending some money. You could change out the air filter to something that flows a little easier. But if you have the money get an intake (Volant, TRD, URD) and get a new exhaust system.
     
  8. Mar 15, 2007 at 12:26 PM
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    MAXTacoma

    MAXTacoma [OP] Well-Known Member

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    Thanks... I really like the way it looks to except the fact that every Tacoma has a bull bar that looks like mine, but anyways my friend works at a truck place (Holman Motors) and I was able to get the bull bar for $325 which is discounted because I think that it usually cost over $425... You can prolly get it off ebay for the same price I paid if you look around...
     
  9. Mar 15, 2007 at 2:48 PM
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    TRDeity

    TRDeity Well-Known Member

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    Thats the plan (CAI and exhaust). I would like to do headers to tail pipe but not sure how well the headers work and which companies offer them. Do you know if MAC makes any?
     
  10. Mar 15, 2007 at 3:22 PM
    #10
    2003greenbean

    2003greenbean Carolina Alliance Costal Div

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    is the torq the same on the 05 and 06
     
  11. Mar 15, 2007 at 4:46 PM
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    MAXTacoma

    MAXTacoma [OP] Well-Known Member

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    The horse power for the 2006 and up V6 is rated at 266 lb ft. while the 2005 is rated at 282 lb ft. so yes the torque went down as well. This is throught all of toyota cars and trucks. the Avalon, Camry, 4Runner, Tundra they all had lower power ratings.
     
  12. Mar 16, 2007 at 2:40 PM
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    Golf77

    Golf77 Active Member

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    I think everyone got derated in '06 or '07. My 2005 Outback XTwent from a rating of 250HP/250lb ft down to about 241 HP this year.

    Correct me if I'm wrong, but didn't the new procedures also relate to fuel grade? Seems like I recall reading that if the HP figures were based on 91 octane fuel, the mfg. had to specify this requirement on the vehicle. Under the old standard, they'd test the engine with premium fuel and optimal tuning which would skew the HP figures up, but in the real world, running 87 octane produce significantly lower numbers.

    YMMV. :D
     
  13. Mar 16, 2007 at 9:09 PM
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    topdec

    topdec Well-Known Member

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    Would an aftermarket catalytic converter help as well?
     
  14. Mar 18, 2007 at 11:06 AM
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    TRDeity

    TRDeity Well-Known Member

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    Yes it would, how much I can't say, but anytime you can get more flow you should get more power and sometimes better MPG. Just make sure it will pass your emission laws for inspection.
     
  15. Mar 25, 2007 at 8:03 PM
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    lsocoee

    lsocoee My hair is all natural Moderator

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    I haven't looked into this but I've heard there is a secondary air filter in the intake. There is a thread on one the pages that talks about removing it. I would rather have extra filtration and a few less HP, so I'm leaving mine installed.
     
  16. Apr 5, 2007 at 10:10 AM
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    TacoChef

    TacoChef Well-Known Member

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    I work for Toyota. Has nothing to do with the engine. The Automotive industry is moving to a different HP rating for all new cars. Sorry forgot the name.

    Any other questions glad to assist!
     
  17. Aug 8, 2007 at 3:08 PM
    #17
    tacomaB

    tacomaB Member

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    I am interested in this secondary filter and if there was any gains at all with the 4.0L by removing it?
     
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