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2nd Gen 4x4 35s 3" Lift w/o BODY LIFT

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Slimwood Shady, Jul 10, 2013.

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  1. Dec 6, 2013 at 11:30 AM
    #621
    MadToy

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    MadToy Well-Known Member

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    Mine is exactly 10% off, which makes it easy to know how fast I'm really going. 70 is 77, 60 is 66, etc....
     
    MadToy, Dec 6, 2013
    #621
  2. Dec 6, 2013 at 11:45 AM
    #622
    dirtymike

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    dirtymike Well-Known Member

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    Fiberglass,spindles, coils, 4"leafs, gears&locker, no skids :-/
    So what calculations should I use for 37s and 4.56? To find out mpg since odometer isn't correct
     
    Last edited: Dec 6, 2013
    dirtymike, Dec 6, 2013
    #622
  3. Dec 6, 2013 at 12:00 PM
    #623
    MadToy

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    MadToy Well-Known Member

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    I'd say 15%.

    Mine was 5% off with 33's, and 10% off with 35's. So I would assume 15% off with 37's - although that depends on the actual size of the 37. A 37" KM2 is probably not much bigger than a 35" MTR.
     
    MadToy, Dec 6, 2013
    #623
  4. Dec 6, 2013 at 12:01 PM
    #624
    skygear

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    skygear                    

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    use the tire calculator.... thats what TW has it for! ;) :bananadance:
     
    skygear, Dec 6, 2013
    #624
    Stryker420 likes this.
  5. Dec 6, 2013 at 12:18 PM
    #625
    MadToy

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    MadToy Well-Known Member

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    I use a GPS. The tire calc assumes all tires are exactly the size they calculate to, which is never the case. For me, that calc is off almost 3mph at 60. So it would be worse at 70.
     
    MadToy, Dec 6, 2013
    #625
  6. Dec 6, 2013 at 12:18 PM
    #626
    dirtymike

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    dirtymike Well-Known Member

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    Fiberglass,spindles, coils, 4"leafs, gears&locker, no skids :-/
    Toyos mt
     
    dirtymike, Dec 6, 2013
    #626
  7. Dec 6, 2013 at 12:20 PM
    #627
    dirtymike

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    dirtymike Well-Known Member

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    Fiberglass,spindles, coils, 4"leafs, gears&locker, no skids :-/
    I didnt know it calculates for gears I know I'm off 10mph at 60 I'm really go ing 70
     
    dirtymike, Dec 6, 2013
    #627
  8. Dec 6, 2013 at 12:23 PM
    #628
    MadToy

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    MadToy Well-Known Member

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    Gears don't affect the speedo on an automatic. Not sure about the 6 speed.
     
    MadToy, Dec 6, 2013
    #628
  9. Dec 6, 2013 at 12:25 PM
    #629
    HomerTaco

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    HomerTaco also HomerTaco Vendor

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    HomerTaco ...................................................................................................................................................... Core-Hurst short throw shifter & T-handle / Carbon Fiber Interior / custom console light / De-badged / leather interior / Heated Front seats / Red Line Hood Struts / Painted speaker grills /one-off TRD Satoshi Grill with 12-15 front-end swap/ Pioneer AVIC-X920BT HU / Scangauge II / Black LED Tails / Dash Mount for iPad mini / Safari Snorkel / Auto-pilot mode / Leer 100XQ Cap / 4x Innovations sliders / Rear Diff Breather Mod / front windows tinted to 35% / Brute Force Fab Hybrid Front Bumper / BAMF Rear Diff Skid / Budbuilt Skids / CBI Trail Master 2.0 rear hybrid bumper / Fox rr coils/ TC UCA's/ TC spindle gussets/ TC Cam Tab gussets / Dakar leafs / Defined Engineering shackles / All pro U bolt flip / Timbren Rear Bumpstops / BAMF LCA skids / Exhaust re-route / Fog Light anytime Mod / LowRange Off Road extended rear brake lines / ATO Shackle Flip / sectioned Bushwhacker flares / re-geared to 4.56 / ARB Front & Rear Locking Diff / ARB CKMA12 compressor / PrInSu full rack system / 1" body lift / Inchworm 4.7 crawlbox / twin stick FJ t-case / Davez off-road triple-stick kit/
    07' manual trans 4.0 v6 re-geared 4.56 on 35x12.5x17
    75mph showing on the speedo - actual speed 70mph.

    Close enough... :cool:
     
    HomerTaco, Dec 6, 2013
    #629
  10. Dec 6, 2013 at 12:26 PM
    #630
    colinb17

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    colinb17 If at first you don't succeed, don't try skydiving

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    vvv

    bingo. autos derive the speedo reading from the wheel speed sensor.
     
    colinb17, Dec 6, 2013
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  11. Dec 6, 2013 at 12:30 PM
    #631
    LoadedTaco

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    LoadedTaco Kick A$$ Member

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    Now that everyone is getting technical, I will record my data. I used a GPS on my phone to know it was off. I will check and find out exactly how much I am off on the way home.

    Tire Sizes went from:
    265/70/16
    285/75/16
    315/70/17
     
    Last edited: Dec 6, 2013
    LoadedTaco, Dec 6, 2013
    #631
  12. Dec 6, 2013 at 12:32 PM
    #632
    MadToy

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    MadToy Well-Known Member

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    That's exactly the same as me. Interested to see if your results are the same.
     
    MadToy, Dec 6, 2013
    #632
  13. Dec 6, 2013 at 12:32 PM
    #633
    colinb17

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    colinb17 If at first you don't succeed, don't try skydiving

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    265/70/16
    315/70/17

    so plug in those two sized with the calculator and multiply 70 mph (or any speed) by the percentage it spits out. that will get you a ballpark number and be an OK correction factor for mileage and speed until you can use the gps to find out the true correction factor.
     
    colinb17, Dec 6, 2013
    #633
  14. Dec 6, 2013 at 12:32 PM
    #634
    la0d0g

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    la0d0g Its 4 o’clock somewhere

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    Your speedo shows you going faster than you're actually going? Seems backwards :notsure:
     
    la0d0g, Dec 6, 2013
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  15. Dec 6, 2013 at 12:33 PM
    #635
    colinb17

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    colinb17 If at first you don't succeed, don't try skydiving

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    manual transmission speedos are affected by diff regearing changes, since they read from the transmission, not the wheel sensors.
     
    colinb17, Dec 6, 2013
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  16. Dec 6, 2013 at 12:34 PM
    #636
    LoadedTaco

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    So if I wanted to calculate an accurate MPG I would need to:

    Miles Recorded x 1.1227 <(assuming 12.27% off)
    ------------------------------
    Gallons Consumed
     
    Last edited: Dec 6, 2013
    LoadedTaco, Dec 6, 2013
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  17. Dec 6, 2013 at 12:35 PM
    #637
    la0d0g

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    la0d0g Its 4 o’clock somewhere

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    I've driven next to a friend when my speedo says 70 and I was actually going 75-77. I'm confused now.


    Edit: guess I need to go use a GPS
     
    la0d0g, Dec 6, 2013
    #637
  18. Dec 6, 2013 at 12:38 PM
    #638
    colinb17

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    colinb17 If at first you don't succeed, don't try skydiving

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    craig may be on 4.88s. not sure :notsure:
     
    colinb17, Dec 6, 2013
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  19. Dec 6, 2013 at 1:06 PM
    #639
    skygear

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    skygear                    

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    Bet if you have a COP buddy, he could run laser on you as you drive past. That way you could be spot on with where you are....

    I just use my GPS/ PHONE/ ANDROID for all the speed sensor stuff. VErry accurate.
     
    skygear, Dec 6, 2013
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  20. Dec 6, 2013 at 1:09 PM
    #640
    richardbui23

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    richardbui23 That guy

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    richardbui23, Dec 6, 2013
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