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Tacoma 4.0 vs Tundra 4.0

Discussion in 'Performance and Tuning' started by BIGGJERRYC, Aug 21, 2012.

  1. Aug 21, 2012 at 7:45 PM
    #1
    BIGGJERRYC

    BIGGJERRYC [OP] Well-Known Member

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    Assuming the 4.0 in both the tundra and the tacoma are the same short block,

    Why does the tundra version have 35 more hp?
     
  2. Aug 21, 2012 at 7:48 PM
    #2
    Rich91710

    Rich91710 Well-Known Member

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    Different heads.
     
  3. Aug 21, 2012 at 8:27 PM
    #3
    BIGGJERRYC

    BIGGJERRYC [OP] Well-Known Member

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    So are head swaps an option to add power?

    No intentions of doing this... Just curious
     
  4. Aug 21, 2012 at 8:29 PM
    #4
    whippersnapper02

    whippersnapper02 Well-Known Member

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    Different head with dual VVT-i instead of single and the block is different. No you cannot swap heads.
     
  5. Aug 21, 2012 at 8:31 PM
    #5
    Rich91710

    Rich91710 Well-Known Member

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    A member recently transplanted a Tacoma engine into his Tundra, so it might be possible, but the intake and exhaust are different, air switching valves, and other parts of the emissions system.

    And since rated HP is RWHP, you may still not gain the full 35... the heads may or may not be responsible for the difference. Could also be in the trans, gearing... or even the ECU programming.
     
  6. Aug 21, 2012 at 8:39 PM
    #6
    whippersnapper02

    whippersnapper02 Well-Known Member

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    I would swap in the dual VVT-i 4.0 into my truck. I would need the FJ ECU and it should work. But then again I would probably need the whole harness.
     
  7. Aug 21, 2012 at 8:42 PM
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    Rich91710

    Rich91710 Well-Known Member

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  8. Aug 21, 2012 at 8:56 PM
    #8
    whippersnapper02

    whippersnapper02 Well-Known Member

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  9. Aug 22, 2012 at 5:11 AM
    #9
    Torspd

    Torspd Tor-nication

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    '07-09 FJ is the same as the '05-11 Tacoma 1GR. So his would have to be the same, to make a direct swap.

    Also, side note. The all of the 1GR's that are NOT dual vvti are stronger than the new ones with dual vvti.

    They run less compression, and have a fully counterweighted crank versus the new ones which have less counterweights.
     
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