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LA400k RPM in 5th at 60mph?

Discussion in 'General Chat' started by Kisobush321, Oct 20, 2023.

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  1. Kisobush321

    Kisobush321 Copenworld Newbie

    Joined:
    Sep 23, 2023
    Location:
    Japan
    Car(s):
    2009 L880k Copen
    Anyone know what RPM a manual LA400k is at when it's in 5th gear going 60mph??? Same as the L880k???
     
  2. AFR0N1

    AFR0N1 Copenworld Regular

    Joined:
    Mar 22, 2018
    Location:
    East Midlands
    Car(s):
    Daihatsu Copen L880K (KMVZW)
    I did some maths and based on the gear ratio and tire size, at 60mph (26.8224 m/s) the engine speed should be 3724.481296 rpm. (3.7 x1000)

    A UK delivered L880k will be doing 3,678 rpm and a JP L880k MT will be doing 3,901rpm

    Specs on the LA400k MT:
    5th gear ratio: 0.75
    Final drive: 5.545
    Wheel diameter (mm): 572mm

    Hopefully my math was correct. (edit: compared with an online calc and got the same result)
     
    Last edited: Oct 21, 2023
  3. AFR0N1

    AFR0N1 Copenworld Regular

    Joined:
    Mar 22, 2018
    Location:
    East Midlands
    Car(s):
    Daihatsu Copen L880K (KMVZW)
  4. Kisobush321

    Kisobush321 Copenworld Newbie

    Joined:
    Sep 23, 2023
    Location:
    Japan
    Car(s):
    2009 L880k Copen
    Cheers mate. But I know the 880's (I have one). Was just wondering the L400K's to see if they improved upon the high RPM on the highway. I figure it's probably similar. Can't figure out why they haven't just added a 6th gear. It's really the Copen's (or all kei-cars for that matter) Achilles heel. Perhaps its only one.
     

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