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rpm's at speed

Discussion in 'Pacific Region' started by delta9blazer, May 20, 2002.

  1. delta9blazer

    delta9blazer 1/2 ton status

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    rpm\'s at speed

    just installed a tach, and i wanted to compare my current gear/tire set-up against stock. anyone know where i could find rpm's at a given speed? some kind of tech article, or a stock 350/700R4 combo with stock tires?
     
  2. gokartergo

    gokartergo 3/4 ton status Staff Member Moderator

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  3. 1979Jimmy

    1979Jimmy 1/2 ton status

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    Re: rpm\'s at speed

    4lo.com has some good calculators too
     
  4. 70~K5

    70~K5 1/2 ton status

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    Re: rpm\'s at speed

    My stock '95 dually has a 4L80HD trans, 3.73 gears, and 215/85x16 tires. At 65 mph it's turning 2100rpms. If I was to cruise at 55 which is 1800 revs I'd get 14 mpg instead of 10.5 that I get now
     

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