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NB wishbones on a NA?

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Hugeness
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NB wishbones on a NA?

Postby Hugeness » Sun Oct 04, 2020 3:24 pm

Will the front upper wishbone listed as for a 1.8 Mk2 98-05 fit on the mark1, also a 1.8?
I was wondering because they’re £180 a corner from MX5Parts and I can get them for £60ish on eBay brand new. My Ball joints are jiggerd (oo’er misses :-D )
1996 Mk1 Eunos Roadster in red
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blackyb
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Re: NB wishbones on a NA?

Postby blackyb » Sun Oct 04, 2020 4:31 pm

No idea but will be interested to know.
1993 1.6 Eunos Roadster (gone)
1998 UK Mk 2 1.6 (gone)
2003 1.8 SVT Sport (Why did I sell it - cos the wife said so!!!!)
1991 1.6 Eunos Roadster with a bit of bling.

Life is a journey, best travelled topless in an MX5!!
Zed.
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Re: NB wishbones on a NA?

Postby Zed. » Sun Oct 04, 2020 4:35 pm

top front wishbones are dimensionally identical.

NA & NB / fl have diferent top balljoint lengths, this is the tapered pin & thread length. otherwise interchangable in the wishbones BUT to use an NB balljoint in an NA upright you need a spacer-washer (~3mm thick?) for the nut to tighten & splitpin to align with the nuts castellations - obvously you could use a nyloc nut :teasing-neener:

https://supermiata.com/SuperMiata-Upper-Ball-Joint.aspx
^^ as example.


NB & fl have a strengthening brace that can contact some dampers / springs.

lower wishbones differ in their arb link mounts although NB lowers are sold by Mazda as fitting '89-'05 so...

http://racetrackdriving.com/tech/miata/ ... terchange/
some light reading? :handgestures-thumbup:


Image
NA top balljoint, NB lower balljoint. :handgestures-thumbup:
from
https://mighty5s.com/post/41142/thread

Rich.
Saw it, wanted it, threw a tantrum.............
.....
......
....
Got IT :dance:

50-shades of silver...
https://mighty5s.com/thread/2681/50-sha ... r-na-eunos
Hugeness
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Re: NB wishbones on a NA?

Postby Hugeness » Mon Oct 05, 2020 1:49 pm

:text-goodpost:

Great info @Zed, thanks very much. I’m really just trying to avoid having to get the all joints out of the front uppers as I haven’t got a press. The bottoms are just bolt on (from what I can see).
As long as the taper angle is the same, using a spacer will probably do the job. The advantage of new arms in they come with bushes fitted making it more cost effective.

I’m guessing getting the old ball joints out of the uppers is a bit of a job?

Ta
1996 Mk1 Eunos Roadster in red
Zed.
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Joined: Mon Jan 01, 2018 2:58 am
Location: 10miles west of Swansea

Re: NB wishbones on a NA?

Postby Zed. » Mon Oct 05, 2020 2:58 pm

Hugeness wrote:guessing getting the old ball joints out of the uppers is a bit of a job?


I used a hydraulic press but some thought & a bench-vise should do the job :handgestures-thumbup:

I'd be carefull if using a hammer & sockets though as the wishbone is a bit 'thin' so could deform in the 'bore' that the balljoint fits (balljoint is 'splined' to grip the wishbone)


I'll probably be getting new wishbones for my '91 just as they're not rusted as opposed to ease of balljoint replacement (even though I've just sandblasted some spares :doh: )

Rich.
Saw it, wanted it, threw a tantrum.............
.....
......
....
Got IT :dance:

50-shades of silver...
https://mighty5s.com/thread/2681/50-sha ... r-na-eunos
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Bluebell18
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Location: Cheshire

Re: NB wishbones on a NA?

Postby Bluebell18 » Sat Oct 10, 2020 8:35 pm

Been there, done that got the tee shirt. Look at Swopping a Mk2 front suspension onto my Mk1!
Eunos Roadster …. One of the 'Blue Gs'
Hugeness
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Joined: Thu Jun 15, 2017 12:06 pm

Re: NB wishbones on a NA?

Postby Hugeness » Sat Oct 24, 2020 12:53 pm

So I just need a spacer, oh, and Spot on Bluebell!
1996 Mk1 Eunos Roadster in red

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