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Launching in 4wd

Discussion in 'Performance and Tuning' started by Jason'sLawnCare, Jul 13, 2009.

  1. Jul 13, 2009 at 6:42 AM
    #1
    Jason'sLawnCare

    Jason'sLawnCare [OP] Prepared for Bambi

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    I was watching pinks all out and a guy had a dodge diesel that ran like 11's or something. They were saying he launches in 4wd then shifts it back to 2 down the track.

    I was curious if anybody has tried this in a taco. Would this break anything cuz I would Imagine that would be an extreme amount of stress on the transfer case. Being floored on a sticky surface.


    Thanks
     
  2. Jul 13, 2009 at 6:45 AM
    #2
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    FlimFlubberJAM
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    I have done it on a track a few times, and when its raining, pulling away from an intersection. Never had an issue. DONT take turns on the street when in 4 wheel drive.
     
  3. Jul 13, 2009 at 6:47 AM
    #3
    Jason'sLawnCare

    Jason'sLawnCare [OP] Prepared for Bambi

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    Did you go all out and floor it?
     
  4. Jul 13, 2009 at 7:26 AM
    #4
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    4.10 gears, sliders, and lots of buttons.
    On my first gen, I did quite a few 5K rpm clutch drops....On the Dodge, being an automatic, I would just punch it off the line.
     
  5. Jul 13, 2009 at 7:36 AM
    #5
    dixiedeerslaya

    dixiedeerslaya Well-Known Member

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    ive done it a few times.... but have always worried i was gonna break something....
     
  6. Jul 13, 2009 at 9:00 AM
    #6
    XrunnIT

    XrunnIT Well-Known Member

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    There is a 4wd auto double cab in AZ that races his truck at the track, runs low 13's, launching in 4wd with a bunch of weight reduction. He does that under boost as well.

    Launches 4wd, switches to 2wd. He hasn't had any issues to my knowledge.
     
  7. Jul 13, 2009 at 9:22 AM
    #7
    GotLift37

    GotLift37 Bangers Runner

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    I took the 4runner to the 1/8 mile track the last two weeks for a test and tune, launched in 4wd both time, just left if it 4wd. my only get up to like 70mph. so it aint that bad i wouldnt think.
     
  8. Jul 13, 2009 at 7:08 PM
    #8
    Jason'sLawnCare

    Jason'sLawnCare [OP] Prepared for Bambi

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    Cool. Thanks for all the responses guys. I want to go to the strip just to see what it can do, more feel what it can do that actual numbers.
     
  9. Jul 13, 2009 at 7:10 PM
    #9
    Jason'sLawnCare

    Jason'sLawnCare [OP] Prepared for Bambi

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    Geez, you ran your trucks hard, atleast at the strip. Now I know that I don't have much to worry about.
     
  10. Jul 13, 2009 at 7:18 PM
    #10
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    And my First gen was SC'ed. :D
     
  11. Jul 13, 2009 at 7:21 PM
    #11
    Jason'sLawnCare

    Jason'sLawnCare [OP] Prepared for Bambi

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    Nice. Why did you sell that? I'm suprised you didn't take she sc off and figure out some way to install it on your 2nd gen.
     
  12. Jul 13, 2009 at 7:26 PM
    #12
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    A guy offered me the right amount of money. I miss it, but money talks. :)
     
  13. Jul 13, 2009 at 7:32 PM
    #13
    djs05tacoma

    djs05tacoma Well-Known Member

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    why would he go back to 2wd? When I made passes in my dodge diesel I always did it in 4wd but did the whole run in 4wd.
     
  14. Jul 13, 2009 at 7:33 PM
    #14
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    Reduced drive train drag
     
  15. Jul 13, 2009 at 7:34 PM
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    Jason'sLawnCare

    Jason'sLawnCare [OP] Prepared for Bambi

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    I don't blame you.
     
  16. Jul 13, 2009 at 7:38 PM
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    djs05tacoma

    djs05tacoma Well-Known Member

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    ahh, never even thought about that.
     
  17. Jul 14, 2009 at 5:19 PM
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    j_cyrus

    j_cyrus Well-Known Member

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    I don't know about doing this in a Tacoma... I guess it would work.

    On the diesel trucks you built boost to about 20lb and just let off the brake.... It was fun. 0-60 in no time.
     
  18. Jul 14, 2009 at 5:22 PM
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    j_cyrus

    j_cyrus Well-Known Member

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    I know on the Ford diesel's if you had the 4x4 switch on the dash it was useless to try and put it back into 2wd, it wouldn't ever disengage.

    I don't know about Dodge and Duramax.

    The only way I would think it would go back into 2wd would be with the 4wd pole on the floor. And from the times I have seen it done you have a lot of backlash through the drivetrain..

    I would personally just leave it in 4
     
  19. Jul 16, 2009 at 10:20 AM
    #19
    HOSS454

    HOSS454 Well-Known Member

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    i have done it in my taco going down the strip. i run at my local track every month and have tried it a couple of times just for kicks cuz i have seen the supercharged truck do it. i would launch in 4wd and then turn it back to 2wd for the rest of the way down the 1/4. my truck is an auto so it doesnʻt burn out in 2wd, so i just leave it like it is. the times i run were pretty much the same 2wd and 4wd. if anything 4wd was a few hundreths slower than 2wd. i donʻt have the timeslips with me at the moment. hope this helps.
     
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