Gearing calculation
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  1. #1
    Official RnS Addict KoppaK's Avatar
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    Gearing calculation

    Can anyone tell me what rpm the engine will be spinning at 70mph please, this stupid laptop won't run any of the calculators on line

    Tyre size = 175/80 14 which is about 636mm or 25"
    Top gear is 1:1


    Thank you
    If sparks don't fly it's too high

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    Exceeded sell by date Plumpcars's Avatar
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    Diff Ratio?

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    Official RnS Addict scooder's Avatar
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    Eleventy million. I have assumed your diff ratio here.
    Martin.

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    Exceeded sell by date Plumpcars's Avatar
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    Official RnS Addict KoppaK's Avatar
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    Damn knew I forgot something 3.9:1
    If sparks don't fly it's too high

  8. #6
    Exceeded sell by date Plumpcars's Avatar
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    3,700rpm

  9. #7
    Rods 'n' Sods Junkie
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    Manual or auto. If manual is it 5 speed. If auto what box is it

  10. #8
    Official RnS Addict KoppaK's Avatar
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    Perfect, thankyou :-)
    If sparks don't fly it's too high

  11. #9
    Official RnS Addict mygasser's Avatar
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    look at RPM / Speed / Gear Ratio Visual Calc you should be able to put in your specs and get an idea.
    need a job done on your project? i may be able to help.

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