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5-speed to 6-speed conversion in a mk1

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Andrew
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5-speed to 6-speed conversion in a mk1

Postby Andrew » Sat Jan 04, 2014 12:45 pm

Just a few notes on this for guidance.

It's an easy swap from the 5-speed to the 6-speed. I have one in my 1.6 mk1 with a 4.3:1 standard viscous diff. You need the gearlever with the 6-speed box, also the NB starter motor (a good swap as it's lighter) and the plate between the engine and gearbox. You also need to re-join 2 of the connectors on one of the sensors (can't remember if it's the neutral or reverse switch) as they are male instead of female on one of them. The speedo drive can be swapped out of your old 5-speed box so the speedo reads correctly. the speedo drive matches the diff, eg. the red drive gear is for the 4.3 diff (1.6) and the purple gear is for the 4.1 diff (1.8).

6-speed gives a major advantage over 5-speed for track use, particularly on normally aspirated cars, as going up through the gears it never drops out of the 'power' band. The 5-speed has a huge gap between 2nd and 3rd which kills your lap times. I could lap Oulton park 3 secs quicker in my (6sp) 1.6 road car than I could in my 5sp 1.6 race car...
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agent_orange
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Re: 5-speed to 6-speed conversion in a mk1

Postby agent_orange » Sun Jan 05, 2014 7:49 pm

What are the road use pros and cons of having 6 speed?
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Re: 5-speed to 6-speed conversion in a mk1

Postby Mazda Mender » Sun Jan 05, 2014 7:55 pm

None.
To many gear changes in normal driving conditions, but great for motorway driving.
M-m
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Mk 1 Eunos 93 black V.S II 1.8 ,
Mk 2 .1/4 Roadster 99 black & gold V.S 1.8 being rebuilt,
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Re: 5-speed to 6-speed conversion in a mk1

Postby threeflies » Sun Jan 05, 2014 8:07 pm

You get used to the gear changes and I absolutely love my six speed box. Couldn't imagine my 5 without it . You can always be in the right gear for a quick down shift to pass , no dead zone :handgestures-thumbup:
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Re: 5-speed to 6-speed conversion in a mk1

Postby Lazza » Sun Jan 05, 2014 8:35 pm

I love my 6 speed too. Wayne is just a grumpy old man :obscene-buttsway:
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Re: 5-speed to 6-speed conversion in a mk1

Postby Mazda Mender » Sun Jan 05, 2014 9:39 pm

LOL.
But i do it well :teasing-neener:
M-m
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This post is a natural product made from recycled electrons. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects, the articles/answers/comments are provided for information purposes and they are not intended to substitute informed professional advice, I or mazdamenders.net cannot personally be hold responsible for any damage occurred from following this procedure or any injuries from it. Proceed at your own risk.


Mk 1 Eunos 93 black V.S II 1.8 ,
Mk 2 .1/4 Roadster 99 black & gold V.S 1.8 being rebuilt,
Mk 1 Eunos 90 1.6 (claimed by daughter)
MK 2.1/4 Blue V.S Roadster 1.8 99 ...being rebuilt

http://www.mx5oc.co.uk/ http://www.mx5nutz.com/forum/ http://miata.net/ http://www.autolinkuk.co.uk/
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Re: 5-speed to 6-speed conversion in a mk1

Postby Richardn » Mon Jan 06, 2014 9:55 am

Wayne wrote:None.
To many gear changes in normal driving conditions, but great for motorway driving.
M-m


The five speed has a higher ratio top gear than the six speed :confusion-confused:
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Re: 5-speed to 6-speed conversion in a mk1

Postby Mazda Mender » Mon Jan 06, 2014 10:27 am

Richardn wrote:
Wayne wrote:None.
To many gear changes in normal driving conditions, but great for motorway driving.
M-m


The five speed has a higher ratio top gear than the six speed :confusion-confused:

Still not a lover of it, and will not change my opinion buddy, as one of mine as one and i really do not like it.
M-m
The Disclaimer:-
This post is a natural product made from recycled electrons. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects, the articles/answers/comments are provided for information purposes and they are not intended to substitute informed professional advice, I or mazdamenders.net cannot personally be hold responsible for any damage occurred from following this procedure or any injuries from it. Proceed at your own risk.


Mk 1 Eunos 93 black V.S II 1.8 ,
Mk 2 .1/4 Roadster 99 black & gold V.S 1.8 being rebuilt,
Mk 1 Eunos 90 1.6 (claimed by daughter)
MK 2.1/4 Blue V.S Roadster 1.8 99 ...being rebuilt

http://www.mx5oc.co.uk/ http://www.mx5nutz.com/forum/ http://miata.net/ http://www.autolinkuk.co.uk/
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Re: 5-speed to 6-speed conversion in a mk1

Postby Lazza » Mon Jan 06, 2014 3:35 pm

Richardn wrote:
Wayne wrote:None.
To many gear changes in normal driving conditions, but great for motorway driving.
M-m


The five speed has a higher ratio top gear than the six speed :confusion-confused:

It's usually matched to a longer ratio dif giving a longer overall gear ratio in top.
Lazza

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15” Rota Circuit 10 wheels (for track use)
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Re: 5-speed to 6-speed conversion in a mk1

Postby Lazza » Mon Jan 06, 2014 3:36 pm

Wayne wrote:
Richardn wrote:
Wayne wrote:None.
To many gear changes in normal driving conditions, but great for motorway driving.
M-m


The five speed has a higher ratio top gear than the six speed :confusion-confused:

Still not a lover of it, and will not change my opinion buddy, as one of mine as one and i really do not like it.
M-m

Maybe there's something wrong with your one. You should give it to a good mechanic to take a look :teasing-neener:
Lazza

2001 Mk2.5 MX5 1.8 Sport
Hard Dog Deuce
GAZ Gold Pro
Mk3 seats
17” OZ Racing Superturissmo wheels (for the toad)
15” Rota Circuit 10 wheels (for track use)
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Re: 5-speed to 6-speed conversion in a mk1

Postby Mazda Mender » Mon Jan 06, 2014 4:40 pm

:laughing-rolling:
No nothing wrong with it, all works as it should and thats my problem :teasing-neener:
M-m
The Disclaimer:-
This post is a natural product made from recycled electrons. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects, the articles/answers/comments are provided for information purposes and they are not intended to substitute informed professional advice, I or mazdamenders.net cannot personally be hold responsible for any damage occurred from following this procedure or any injuries from it. Proceed at your own risk.


Mk 1 Eunos 93 black V.S II 1.8 ,
Mk 2 .1/4 Roadster 99 black & gold V.S 1.8 being rebuilt,
Mk 1 Eunos 90 1.6 (claimed by daughter)
MK 2.1/4 Blue V.S Roadster 1.8 99 ...being rebuilt

http://www.mx5oc.co.uk/ http://www.mx5nutz.com/forum/ http://miata.net/ http://www.autolinkuk.co.uk/
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Re: 5-speed to 6-speed conversion in a mk1

Postby blackyb » Wed Jul 02, 2014 9:22 pm

Missing my six speed, keep going for the extra gear when I am driving the Eunos, thankfully not managed to find reverse yet???
1993 1.6 Eunos Roadster (gone)
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