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How fast am i really going?

Discussion in '1st Gen Tundras (2000-2006)' started by bassman417, Sep 12, 2020.

  1. Sep 12, 2020 at 4:08 PM
    #1
    bassman417

    bassman417 [OP] "Tundra Time". My favorite time of day...

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    ive noticed something now that i have the Obd2 bafx and torque pro. The speedometer on dash does not match what the obd says and is off by 2-3 mph at times. Even more puzzling is that the gps speed from google is also off from both numbers. i set the cruise at 70mph according to the dash and the obd had it bouncing from 67-69mph and google clocked me around 73mph. the only time all 3 agree is at 0mph.
    since i use cruise control as a speed control where i know the speed traps are setup around town, im not sure which gauge is closest to reality and want to go as fast as I can and get away without a ticket. Anyone?
     
  2. Sep 12, 2020 at 4:48 PM
    #2
    Netmonkey

    Netmonkey Don't be a Dumbass

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    Icon stage 2 lift, 295 60 20 nitto ridge grapplers, fuel kranks, TRD dual exhaust, TRD rear sway bar
    GPS will be the most accurate. speedos are always off a little; especially with larger tires. mine is off by 3.3%. for me, if it says 60, I am really doing 62.
     
  3. Sep 12, 2020 at 5:34 PM
    #3
    Gmillz85

    Gmillz85 Gerg

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    My speedo is off by 5mph with my 33s. It happens.

    Also, just do the speed limit and avoid an accident and tickets EVERYTIME you drive.
     
    BravoDeltaRomeo likes this.
  4. Sep 12, 2020 at 6:45 PM
    #4
    SouthPaw

    SouthPaw The headlight guy

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    Mine is -2mph. I have 265/75/16 so it always reads -2mph according to my torque app, gps app and police radar stations.
     
    bassman417 [OP] likes this.
  5. Sep 13, 2020 at 7:49 AM
    #5
    Baller

    Baller New Member

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    I'm feeling in an irritable mood this morning.

    Please stop posting that your speedo is off by Xmph. It's not, it's off by some percent. I'm running 275/65/R20 and my speedos off by 10%. If the speedo reads 30mph, I'm doing 33mph. If the speedo reads 55mph, i'm doing 60.5mph.
     
    lsaami, FirstGenVol, 035VZFE and 5 others like this.
  6. Sep 13, 2020 at 7:56 AM
    #6
    snivilous

    snivilous New Member

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    I was debating commenting this too "speedo is off by 3mph", so when you're parked it still says you're moving?
     
    035VZFE, Casper421 and Darkness like this.
  7. Sep 13, 2020 at 7:57 AM
    #7
    Rex Kramer

    Rex Kramer 1-8-7-3-6-5-4-2

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    Find one of those unmanned radar road signs that displays your speed, I find those are pretty accurate.

    Driving at the speed limit is pretty good, avoiding tickets and accidents every time you drive is always good.
     
  8. Sep 13, 2020 at 8:02 AM
    #8
    timsp8

    timsp8 Member

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    Are your tires different size than stock? This will give you an estimate of how far off you are.
     
  9. Sep 13, 2020 at 9:13 AM
    #9
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

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    There is an adjustment mode on the BxFx. I ‘ve seen it and messed around with it, but haven’t dialed it in. The adjustment revolves around 1. You’ll adjust +/- in tenths increments which I assume is a factor. What the factor translates into I have no idea. I’ve adjusted both ways with what seems to me no results. I haven’t spent much time on it, but maybe you can dial it in.
     
  10. Sep 13, 2020 at 11:59 AM
    #10
    SouthPaw

    SouthPaw The headlight guy

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    I always believed this but mine is 2mph off at any speeds. 30, 60, 80; it does not matter. I set the cruise 2mph under from the speed I want and it is always off. Not sure if there is some other issue but as far as I know, the tires are the only thing that I put on that would change it.
     
  11. Sep 13, 2020 at 2:31 PM
    #11
    Gmillz85

    Gmillz85 Gerg

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    Same. Mines 5mph no matter how fast I go.
     
  12. Sep 13, 2020 at 2:38 PM
    #12
    blackdemon_tt

    blackdemon_tt New Member

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    Also take in consideration, wind direction and speed, incline or decline will also impact speed as well as tire size and tread....
     
  13. Sep 13, 2020 at 2:39 PM
    #13
    Baller

    Baller New Member

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    :boink:
     
  14. Sep 13, 2020 at 2:43 PM
    #14
    Rex Kramer

    Rex Kramer 1-8-7-3-6-5-4-2

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    Overkill is Highly Underrated
     
  15. Sep 13, 2020 at 3:10 PM
    #15
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

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    Also consider the gravitational pull of other planets in relation to our Earths Orbital Speed and position to the darkside of the moon.
     
  16. Sep 13, 2020 at 3:14 PM
    #16
    blackdemon_tt

    blackdemon_tt New Member

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    don't forget them zero point energy beams from them u-f-uh-ohs...
     
  17. Sep 13, 2020 at 3:19 PM
    #17
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

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    I wonder if Flat Earthers would fall into Space if they dug a hole to the other side?
     
  18. Sep 13, 2020 at 3:20 PM
    #18
    AzureNightmare

    AzureNightmare Geek in a Tundra

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    One way to find out. I'll buy one of them a shovel so they can find out! :thumbsup::devil:
     
  19. Sep 14, 2020 at 4:45 AM
    #19
    bmf4069

    bmf4069 Yup, that's car parts in a dishwasher

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    I always wonder about the accuracy of those. Everytime I drive past one in my work van with stock everything it reads low.
     
  20. Sep 14, 2020 at 6:39 AM
    #20
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

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    Its the extra electrons in your truck that are throwing off the Mojo.
     
    bmf4069 likes this.
  21. Sep 14, 2020 at 7:29 AM
    #21
    Bakershack

    Bakershack Critical of Noncritical Thinkers

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    Actually, we are all going about 67,000 mph +/- 1,000 mph as we fly through space, rotating on Earth's axis. So 3-5 mph is just a tiny rounding error. :plane:
     
    bassman417 [OP] and bmf4069 like this.
  22. Sep 14, 2020 at 7:49 AM
    #22
    lsaami

    lsaami Let ‘er buck

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    3/2" lift, visor, 285/75/16, eibach pro-truck, Cvj axles custom lighting
    my Speedo is off by 9% when I run my 285/75/16s.
     
  23. Sep 14, 2020 at 7:53 AM
    #23
    Schcoman

    Schcoman From behind the Redwood Curtain

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    I've been driving for over 40 years and never have had a speeding ticket. Yeah, my speedo is about 5mph off. Cops aren't looking for people going 5 over, they're looking for 10 or above. Just keep it in that range and you should be good.
     
    bassman417 [OP] and bmf4069 like this.
  24. Sep 14, 2020 at 7:56 AM
    #24
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

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    Yeah. All kidding aside, my speedo is off by about 8% on 285/75/r16.

    I did the math on the tire store calculator thingy a few years back and paired it up to some of these roadside radar detectors of that time. The numbers are close to the 8%.
     
  25. Sep 14, 2020 at 1:44 PM
    #25
    bassman417

    bassman417 [OP] "Tundra Time". My favorite time of day...

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    I always set 10mph over the posted limit and I have never been pulled over in and around town in Las Vegas. On our freeways out here, going only 10mph over limit gets you passed by most of the other traffic. 75mph it is.
     
    Schcoman likes this.
  26. Sep 14, 2020 at 5:31 PM
    #26
    Schcoman

    Schcoman From behind the Redwood Curtain

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    I live in Podunk now. Lived in Orange County CA. for 35 years. Often observed commuters applying makeup, holding a coffee and making lane changes at 90mph. 75 is slow on the 405, LOL. When I go down for the LBGP I do like the Romans do. Zoom!
     
    bassman417 [OP] likes this.

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