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Bumping the timing...

Discussion in '4 Cylinder' started by Rmodel65, Jan 3, 2011.

  1. Jan 3, 2011 at 8:13 PM
    #1
    Rmodel65

    Rmodel65 [OP] Yukon Cornelius

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    So on my 5.0 Mustang I bumped the timing from 10 degrees BTDC to about 15 BTDC...this increased my MPG on the road to nearly 28mph with a v8, 5spd and 3.55 gears....

    bumping the timing also smooths the idle, lower operating temps and makes more power(assuming you keep your foot out of it)

    how is the taco with bumping the timing on it? how high can i go? what is the base timing? its a 96 4x4 with the 2.7 and 5 spd so i should be able to go a little higher than an auto truck....
     
  2. Jan 4, 2011 at 9:40 PM
    #2
    Rmodel65

    Rmodel65 [OP] Yukon Cornelius

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    no one has bumped their timing?
     
  3. Jan 4, 2011 at 10:20 PM
    #3
    memario1214

    memario1214 Vivid Illumination Vendor

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    I will admit I actually have no solid grasp on this concept though I have heard about it? If its so great why isn't everyone doing it? The car makers as well...
     
  4. Jan 4, 2011 at 10:45 PM
    #4
    brelandt

    brelandt Well-Known Member

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    well, you have to have a full grasp of how your ignition system works. How it works and why it works. During my auto mechanics ignition was by far the hardest subject. But I think I have a pretty good grasp on it.
    As far as the Taco's? You will need to get your hands on the schematics and look over it. I own a 2004 with direct ignition so I can't do it without software. 96 models aren't but to some extent it may be EMC controlled. Also everything from the shape of the combution chamber to the cam will effect how much you can go. Give it a shot!
     
  5. Jan 4, 2011 at 10:58 PM
    #5
    Rmodel65

    Rmodel65 [OP] Yukon Cornelius

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    anyone have a book of what the stock timing is??


    memario1214 its basically doing what a "chip" does it gives you a more compete burn..as why dont they do it emission constraints...we dont have that in GA(unless you live in metro atlanta)
     
  6. Jan 5, 2011 at 9:53 AM
    #6
    brelandt

    brelandt Well-Known Member

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    I forgot to add a little something about fuel.....
    Toyta like most companies design their engines to run on the cheaper faster burning 87 octane fuel which is tested with the common r+m/2 rating which just means the fuels octane was testing using both research and motor. But to my point. The fuel cost less. If you bump the timing too far you will get "preignition". Which can cause lots of issues. Also by retarding the timing you also save wear on the engine by preventing certain conditions from happening in the first place. this is why they don't set the timing much from factory. You can however bump it if you like.
    I think the timing is something like 3-7 degrees????
     
  7. Jan 5, 2011 at 10:16 AM
    #7
    MowTaco

    MowTaco Well-Known Member

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    Torque can tell me what my timing advance is... (I'm assuming that feature is for vvt engines) I wanna say it was like 10.4 degrees last time I saw it. I can check it today next time I'm driving
     
  8. Jan 5, 2011 at 10:20 AM
    #8
    brelandt

    brelandt Well-Known Member

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    is that set without the ad of the EMC intervening to offset hesitation or is that the "base" timing?
     
  9. Jan 5, 2011 at 12:21 PM
    #9
    08pretaco

    08pretaco Almost there

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    this is actually pretty interesting. I couldnt imagine being able to adjust the timing without having a piggyback.
     
  10. Jan 5, 2011 at 3:54 PM
    #10
    dually

    dually Low and slow

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    96 2rz/3rz equipped with a distributor?

    Should be able to make adjustment of ignition timing with a slight turn of the dizzy.

    Newer models arent able to do that since timing is controlled via ECU. Unless you have a piggyback or full standalone like myself, you do not have that ability.
     
  11. Jan 5, 2011 at 4:01 PM
    #11
    bjmoose

    bjmoose Bullwinkle J. Moose

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    I still have a funky shaped 10mm wrench in my toolbox that was used to get to the distributor nut on my '74 alfa romeo.

    Sorry, I have absolutely *no* idea how I'd go about setting the timing on my '11 taco. But thanks for the trip down memory lane.
     
  12. Jan 5, 2011 at 7:29 PM
    #12
    cab4you26

    cab4you26 Well-Known Member

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    Hmm, I'd like to know how to do this on my 97 with coil packs. My 2.7 gets worse gas mileage now after replacing all the timing components on it.
     
  13. Jan 5, 2011 at 9:18 PM
    #13
    Rmodel65

    Rmodel65 [OP] Yukon Cornelius

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    yeah i have a regular dizzy..no coil packs for me... i need to get down on the ground and mark my balancer with some white out to make it easier to see with the timing light
     
  14. Jan 6, 2011 at 4:10 AM
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    dually

    dually Low and slow

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    You would have to replace your ECU with Haltech, AEM, Megasquirt.. etc. But there are no plug and play options.
     
  15. Jan 6, 2011 at 9:59 AM
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    JDCPA

    JDCPA Well-Known Member

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    The computer in the Taco uses variable timing. THe computer in your 5.0 Mustang didn't. If you advance the timing in the 2.7 Tacoma the computer will retard the spark as necessary to avoid preignition. You will not receive any benefit.
     
  16. Jan 6, 2011 at 11:50 AM
    #16
    Rmodel65

    Rmodel65 [OP] Yukon Cornelius

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    yeah the 91 didnt have VVT...but the new 5.0 in the GT's and 3.7 V6 cars do...and you have to tune with a chip
     
  17. Jan 6, 2011 at 8:02 PM
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    MowTaco

    MowTaco Well-Known Member

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    This is just base timing I'm assuming... I don't believe it's adjustable from stock. I really have no idea what I'm talking about, just saying what my OBD reader says.
     
  18. Jan 11, 2011 at 8:52 AM
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    DGXR

    DGXR Well-Known Member

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    That's exactly what I thought, at first. But if the software is complemented (or overwritten? idk) then maybe the timing can be changed? The knock sensor could be cancelled, right? I won't do any of this BS to my engine, this is just for the principle.
     
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