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Fuel Max Performance Chip

Discussion in '2nd Gen. Tacomas' started by GregLee98, Feb 16, 2012.

  1. Feb 16, 2012 at 6:26 PM
    #1
    GregLee98

    GregLee98 [OP] Well-Known Member

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  2. Feb 16, 2012 at 6:29 PM
    #2
    Blasphemous

    Blasphemous Well-Known Member

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    Most likely not.

    There are no proven "chips" for these trucks.

    Your best bet for an increase in power (and only under open loop) would be a URD Maf Cal from urdusa.com
     
  3. Feb 16, 2012 at 6:51 PM
    #3
    worthywads

    worthywads Well-Known Member

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    The 35hp and 4 mpg part is bullshit.

    The the 50% better throttle response can't be argued, it's real.
     
  4. Feb 16, 2012 at 7:13 PM
    #4
    badger

    badger Well-Known Member

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    35 hp + fuel reduction = 100% bullshit. All they have to do to improve throttle response is get rid of the electronic lag.
     
  5. Feb 16, 2012 at 7:15 PM
    #5
    whippersnapper02

    whippersnapper02 Well-Known Member

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    I run 15 of these. The fuel savings and power gains are awesome.
     
  6. Feb 17, 2012 at 7:38 AM
    #6
    GregLee98

    GregLee98 [OP] Well-Known Member

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    Pardon my ignorance, Blasphemous, what is the difference between this one and the URD MAF sensor? Besides price?
     
  7. Feb 17, 2012 at 7:45 AM
    #7
    PLC721

    PLC721 Well-Known Member

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    what you posted plugs into the obd2 and does nothing

    urd maf is hard wired into the ecu and leans out the factoru rich fuel mixture
     
  8. Feb 17, 2012 at 7:51 AM
    #8
    whippersnapper02

    whippersnapper02 Well-Known Member

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    These chips are usually a resistor that tells the ECU that the intake air is colder than it actually is so more fuel gets injected for the colder, denser air.

    The URD unit goes in between the MAF sensor and ECU and it actually has programming in it. It tells the ECU that a different amount of airflow is passing through the intake so that fueling is adjusted for mods and even adjusted from stock because engine usually run a tad lean for emissions purposes. Lastly the URD unit isn't claiming a MPG increase because that isn't what it is for.
     
  9. Feb 17, 2012 at 9:22 AM
    #9
    worthywads

    worthywads Well-Known Member

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    Can the URD be tuned for better MPG and less power?
     
  10. Feb 17, 2012 at 9:25 AM
    #10
    4wd Boss

    4wd Boss Shake and Bake

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    solid question ^ :popcorn:
     
  11. Feb 17, 2012 at 9:27 AM
    #11
    memario1214

    memario1214 Vivid Illumination Vendor

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    I would imagine not. The Maf Cal only works in open loop mode, which is definitely not the efficiency portion of the powerband.
     
  12. Feb 17, 2012 at 10:24 AM
    #12
    Pugga

    Pugga Pasti-Dip Free Since 1983

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    x2, if you're running in open loop frequently, you aren't going for MPGs. If you aren't familiar with open vs. closed loop, typically open loop is higher RPM and higher throttle position. Typical driving around town may never put you in open loop.
     
  13. Feb 17, 2012 at 11:50 AM
    #13
    GregLee98

    GregLee98 [OP] Well-Known Member

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    So the URD MAF is basically only for power and expect to lose some more MPGs?
     
  14. Feb 17, 2012 at 12:05 PM
    #14
    memario1214

    memario1214 Vivid Illumination Vendor

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    If you are always with your foot in the throttle looking for those extra horses, expect less power. If you drive like normal, there's no change in MPG
     
  15. Feb 17, 2012 at 12:11 PM
    #15
    Pugga

    Pugga Pasti-Dip Free Since 1983

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    In closed loop, your current MAF sensor adjusts the fuel map if you will to make the engine more efficient. Once you go to open loop, the ecu defaults to a set map. The URD calibrator wouldn't allow the engine to just default to a set map when in open loop, it instead keeps talking to the ECU and tires to make the engine as efficient as it can be in the open loop. It's not really complete to say it's just for power the problem is someone looking for MPG improvements wouldn't spend a lot of time in open loop. If you tow, you might find yourself in open loop more frequently because your engine will keep trying to make more power. Hopefully not too confusing.

    Even with the URD MAF calibrator, in closed loop, you will see no change at all as your ECU will stick to it's normal routene.
     
  16. Feb 17, 2012 at 3:13 PM
    #16
    worthywads

    worthywads Well-Known Member

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    Gotcha

    But I must point out that deceleration fuel cutoff is also an open loop mode, zero fuel use. Doesn't really apply to what a maf cal could effect though.
     
  17. Feb 18, 2012 at 4:51 AM
    #17
    GregLee98

    GregLee98 [OP] Well-Known Member

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    Open loop/Closed loop. Can someone explain in knuckle dragging terms?
     
  18. Feb 18, 2012 at 4:57 AM
    #18
    griffin407c

    griffin407c Well-Known Member

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  19. Feb 18, 2012 at 7:47 AM
    #19
    Raylo

    Raylo Well-Known Member

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    Open loop: warmup up mode before the cat is up to temp. Basically the ECU is running a static set of parameters and is not using O2 sensor feedback.

    Closed loop: the ECU is fully online and adjusts parameters based on feedback from system O2 sensors and other inputs to optimize combustion and timing.


     
  20. Feb 18, 2012 at 7:52 AM
    #20
    Raylo

    Raylo Well-Known Member

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    Oh, and aftermarket "performance" chips, unless designed to support a specific mod like a 'charger, are worthless... except to the folks selling them. Come up with a fancy high perf name, tweak a few of the parameters that have already been exhaustivey optimized by Toyota, make ridiculous perf or mileage claims, then sell them with an asterisk that "results may vary" which basically is an overt admission of their worthlessness. What a business....
     
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