RPM jump between 4-5 and 5-6 gear shifts.

Discussion in 'Mazdaspeed 3 General Discussion' started by Matt Dickey, Sep 6, 2021.

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  1. Matt Dickey

    Matt Dickey Greenie Member

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    Hey im curious to know if anyone elses car does this or if i need to look into it but when i shift up or down between 4-5 and 5-6 my rpms jump slightly about 500-600rpm without any input from me. Is this a normal thing for the speed motor like the partial throttle KR? Or is my shit broke?
     
    Matt Dickey, via an iPhone, Sep 6, 2021
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  2. Awafrican

    Awafrican Moderator Gold Member

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    I don't follow, of course your rpm will move when you swap gears
     
    Awafrican, via a mobile device, Sep 6, 2021
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  3. Matt Dickey

    Matt Dickey Greenie Member

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    when i 1-2 shift 2-3 shift and 3-4 shift the revs will drop but from 4-5 and 5-6 when i depress the clutch pedal they jump slightly like a rev match even if my foot is off the gas pedal.
     
    Matt Dickey, via an iPhone, Sep 9, 2021
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  4. Enki

    Enki Motorhead Platinum Member

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    Engine loading + inertia. More pronounced with dual mass flywheel.
     
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  5. Matt Dickey

    Matt Dickey Greenie Member

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    So what your saying is this is normal? Cool haha ive been wondering for a while now.
     
    Matt Dickey, via an iPhone, Sep 10, 2021
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  6. Ateryx

    Ateryx Greenie N00B Member

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    Do the revs jump up when you let out the clutch? If so, those are the synchros doin their job. You'll probably want to shift more quickly to prevent them from wearing out as fast.
     
  7. Matt Dickey

    Matt Dickey Greenie Member

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    The revs jump when i push the clutch down to shift from 4 to 5 and 5 to 6.
     
    Matt Dickey, via an iPhone, Oct 26, 2021
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  8. Enki

    Enki Motorhead Platinum Member

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    Mine does this shit almost every shift. It doesn't hurt anything.
     
  9. Matt Dickey

    Matt Dickey Greenie Member

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    I didnt think so i just wanted to know why. Im a curious person.

    But it only does it when warm. When the coolant temp is under 180* F it dosnt jump like that
     
    Last edited by a moderator: Oct 26, 2021
    Matt Dickey, via an iPhone, Oct 26, 2021
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  10. Easter Bunny

    Easter Bunny Professional Engineer Motorhead Platinum Member

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    It because your granny shifting not double clutching like you should
     
    Easter Bunny, via a mobile device, Oct 27, 2021
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  11. Awafrican

    Awafrican Moderator Gold Member

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    5b8639e2ee5c57eeed6112a3732be9cd.jpg
     
    Awafrican, via a mobile device, Oct 27, 2021
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  12. Matt Dickey

    Matt Dickey Greenie Member

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    I thought it was cuz of all the 1000 horsepowers im putting down with my cold air intake and otherwise stock setup. Damn i needa learn how this double clutching works.
     
    Matt Dickey, via an iPhone, Oct 30, 2021
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