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Thread: Manual 6 Speed

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    Manual 6 Speed

    Much has been said about a 6th gear but I wonder what RPM 6th gear would be around 65-70 would it be near the CVT RPM and how much would mpg improve? Dolores the manual has averaged 46 mpg all winter 80% highway/suburb and 20% city driving as of late.



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    Senior Member Cobrajet's Avatar
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    Most folks think that a sixth gear is simply a higher freeway gear added on top of a five-speed for the purpose of improving economy. But this usually isn't the case. All of the other ratios are changed as well, and each gear becomes 'closer' to the next (called a close-ratio transmission).

    Six-speeds are usually offered to increase performance, not economy. Thus, the sixth gear in a six-speed would likely be nearly the same ratio as the fifth gear in a five-speed.

    In an economy car like this I certainly would not expect a six-speed to ever be offered.

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    Moderator inuvik's Avatar
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    Quote Originally Posted by Cobrajet View Post
    Most folks think that a sixth gear is simply a higher freeway gear added on top of a five-speed for the purpose of improving economy. But this usually isn't the case. All of the other ratios are changed as well, and each gear becomes 'closer' to the next (called a close-ratio transmission).

    Six-speeds are usually offered to increase performance, not economy. Thus, the sixth gear in a six-speed would likely be nearly the same ratio as the fifth gear in a five-speed.

    In an economy car like this I certainly would not expect a six-speed to ever be offered.
    Bring back the "Twin Stick"!

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 automatic: 40.7 mpg (US) ... 17.3 km/L ... 5.8 L/100 km ... 48.9 mpg (Imp)


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    Quote Originally Posted by inuvik View Post
    Bring back the "Twin Stick"!
    That would work.

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    Senior Member Cobrajet's Avatar
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    Quote Originally Posted by inuvik View Post
    Bring back the "Twin Stick"!
    Hell yeah!

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    Senior Member MightyMirageMpg's Avatar
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    I know everyone dislikes the short 5th but am i the only one that thinks 1st should be longer, too? I feel like 1st is only useful if your loaded down or something. I start off in 2nd gear quite often. 1st-and-a-half would be really great

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    Moderator Eggman's Avatar
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    Quote Originally Posted by MightyMirageMpg View Post
    I know everyone dislikes the short 5th but am i the only one that thinks 1st should be longer, too?
    I agree but the low first gear makes it easy to start on hills.

    I just wish the ratios were not so close.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 49.2 mpg (US) ... 20.9 km/L ... 4.8 L/100 km ... 59.1 mpg (Imp)


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    Senior Member Top_Fuel's Avatar
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    Isn't there a European-spec 5-speed transmission (or something like that?) that has different gear ratios or maybe a different final drive ratio...that would mean a few hundred RPMs less in 5th gear? That would be a great no-cost option for Mitsubishi.

    I have thought about a massively taller 6th gear before and wondered if it would work. Imagine a 5-speed Mirage turning 2000 RPMS at 65mph with the cruise control on. Now that would be great and I think it would work fine on level ground.

    Now imagine that same situation with the car going up a slight grade at 65mph with the cruise control on. Does this engine have enough power at 2000 RPMs to maintain that speed? Obviously the CVT just bumps up the RPMS in this situation, but in a manual you would almost have to have the cruise disengage at some point to force the driver to downshift. Maybe that's the reason the engineers have decided to keep the freeway RPMs up on a 5-speed.

    ...and someone clue me in on what a "twin stick" is.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 51.6 mpg (US) ... 21.9 km/L ... 4.6 L/100 km ... 62.0 mpg (Imp)


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    Wish we could have a twin stick... back to 2017...

    Grew up around commercial vehicles first gear in Dolores reminds me of starting in the hole.

    Good question top fuel I wondered if the 1.0 option was geared differently.

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    Quick link to Wiki about Mitsubishi's twin stick aka super shift transmission in the mirage!

    https://en.wikipedia.org/wiki/Mitsub...t_transmission



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