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HIGHWAY RPM'S ?

Discussion in '4 Cylinder' started by 2bnb driver, May 16, 2012.

  1. May 16, 2012 at 7:09 PM
    #1
    2bnb driver

    2bnb driver [OP] Member

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    mark
    central virginia
    Vehicle:
    02 prerunner , 13 sr5 4wd
    Im trying to get an "out of the box" picture of what gearing translates to when the stock tires hit the road.

    I have a base 2.7l tacoma with the standard tires and auto transmission. At 70mph im running at 2200 rpm.

    I would like to know at 70mph, and in stock configuration, how many RPM's a base stick runs. Like wise a 4x4 2.7l base truck.

    Thank you
     
  2. May 17, 2012 at 9:00 PM
    #2
    jassco

    jassco Well-Known Member

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    Boston
    Vehicle:
    2010 Access Cab 2.7L SR5 5spd, 4x4
    5100 set to .85 w/ rear TSB, 2012 Rear-view Mirror, Grillecraft, Team Trails FJ Wheels, TPMS canister, Rear headrest delete, Rear console delete, Valley Hitch, Frame undercoat, $2.99 Tailgate hose clamp lock, Avid light bar, 4x4 lighted switch ala Biceman.
    I do about 2600 rpm at 70mph. 4.10 gears stock.
     
  3. May 27, 2012 at 7:14 PM
    #3
    wolftree

    wolftree Well-Known Member

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    Rick
    Ohio
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    2011 Tacoma 4x4 Regular cab automatic trans,
    Rear Leaf TSB, Bilstein 5100s, extra leaf added
    With Ohio speed limit at 65mph, I am turning right around 2000 rpm at 65mph. I can feel the engine coming up onto the camshafts sweet spot right around 1900 RPM right on through 2500 RPM. I am running 265X70R-16 tires.
     
  4. May 27, 2012 at 7:32 PM
    #4
    Rackster

    Rackster Well-Known Member

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    Kevin
    Connecticut
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    There's a tool out there on the Web where you can enter in your gear ratios and tire size to get RPMs at any given speed. I thought I had it book marked, but I didn't. Do a browse and see what you turn up.
     
  5. May 29, 2012 at 5:46 AM
    #5
    knucklehead

    knucklehead Well-Known Member

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    Jeff
    Ottawa
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    Hitch, nav header
    http://www.vibratesoftware.com/html_help/2011/Toyota/Toyota_Transmission_Gear_Ratios.htm

    look up overdrive ratio and axle ratio, multiply them together to find overall ratio.

    You can use the tire specifications on tirerack.com, specifically "revolutions per mile".

    rev_per_mile x mile_per_hour = rev_per_hour. Multiply that by 60 and you have wheel RPM. Multiply wheel RPM by overall gear ratio and you have engine RPM.
     
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