Gear Ratios & Final Drive Was: Speaking of manual boxes

Archives of Posts to the NZ MX5 List back in 2006
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KSCRIM
Need, more, 5-ing, time....
Need, more, 5-ing, time....
Posts: 137
Joined: Thu May 18, 2006 8:46 pm
Location: West Auckland

Gear Ratios & Final Drive Was: Speaking of manual boxes

Post by KSCRIM » Fri May 05, 2006 7:53 pm

I drove a NC recently and was frankly disappointed. The 6 speed box seemed a
bit of a waste due to the greater torque available from the 2 litre engine.
I found I was deliberately missing some gears as I didn't need them!!!. Yes
the engine revs are lower for a given road speed, but that is due to the
lower diff ratio. I also found the gear changes coming up too fast. Quite
frankly I felt that for most purposes the 5 speed box would be a more user
friendly unit in the NC.
However, for those who like to keep the engine singing in the upper rev
range, the 6 speed box is more to play with. More gears in the boxes seems
to be the fashion these days.
The only way to reduce the engine revs at highway speeds is to change the
diff ratio.
My 2 cents worth.

Kevin

[...]
Kevin 2010 NC PRHT. (98 NB6C sold)

ianbell
Need, more, 5-ing, time....
Need, more, 5-ing, time....
Posts: 100
Joined: Thu May 18, 2006 10:36 pm
Location: Pukekohe

Gear Ratios & Final Drive Was: Speaking of manual boxes

Post by ianbell » Sat May 06, 2006 10:12 am

My MX5 5 speed doesn't rev as high as that at 100kph. Do you have low profile
tyres on? The difference in tyre size from a 185 - 65 x 14 to a 185 - 55 x 14
is 6.21%, quite a difference in revs I would think. Here is a good link for
info & calculations:
http://www.chris-longhurst.com/carbible ... t=8258c079
50ea6164

Ian

CHN433

From chris.tankard@aderant.com Fri Apr 27 17:58:55 2007
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Subject: Re: Topgear reviews new MX5
Date: Sat, 6 May 2006 11:21:40 +1200
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I have read that google have taken them all off just recently for copyright reasons. I have a copy that I can lend - its in the office at the moment but I can send Monday.


(Sent from my BlackBerry)

EricW
See my 5 and raise you.
See my 5 and raise you.
Posts: 95
Joined: Wed May 24, 2006 7:07 pm
Location: Whangaparaoa

Gear Ratios & Final Drive Was: Speaking of manual boxes

Post by EricW » Sun May 07, 2006 10:35 am

Yes, this was my experience of the NC as well. If I were buying one, I think
the auto with paddles would be more fun

Eric

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