cliftyhanger
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| posted on 4/1/26 at 04:18 PM |
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Scan/CAD of zetec and/or early MX5 backplate
Anybody know of a source for a scan or CAD file of the back of a zetec engine and/or early MX5 NA/NB box
I am thinking of attempting an early MX5 box onto a zetec (the later N7 box is way too fat to go between my chassis rails)
I have a handy local who can do the CAD work to merge the 2, and even 3d print me a prototype....
TIA
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obfripper
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| posted on 5/1/26 at 10:48 AM |
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Here's an stl model of a zetec blacktop complete engine at 1:4 scale, I don't know how accurate the model is, but looks fine by eye.
Probably needs scaling in onshape/freecad and checking against a few known measurements to be sure.
https://cults3d.com/en/3d-model/game/ford-zetec-engine-scale-model
Dave
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cliftyhanger
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| posted on 6/1/26 at 06:29 PM |
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Thank you
That is a slight curveball!
I will get my useful 24 year old to see what he can do with that.
I was hoping a Zetec file would be easy to find, plenty of adaptor plates for other gearbox conversions about, but I guess they are commercial and
don't share.
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pigeondave
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| posted on 6/1/26 at 10:10 PM |
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Can't you just search for zetec drawing on Google.
Or type 9 bell housing pattern?
The type 9 bolts straight up.
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cliftyhanger
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| posted on 7/1/26 at 01:20 PM |
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quote:
Originally posted by pigeondave
Can't you just search for zetec drawing on Google.
Or type 9 bell housing pattern?
The type 9 bolts straight up.
I have spent hours searching. I reckon most are "commercial" and kept by the people who make adapter plates. The ghetto approach uses card,
then steel sheet to make a template, but I am hoping for a "better" solution as getting the input shaft dead central is critical. All the
DIY stuff you have to rely on zero wobble on the input shaft.
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obfripper
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| posted on 7/1/26 at 02:02 PM |
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I have a possibly more useful diagram of a cosworth yb, AFAIK the mounting bolt pattern is the same as a type 9/zetec.
 
Cosworth yb bellhousing patter
The only help I can offer re the mazda pattern is someone in the following thread had created a dxf for the mazda gearbox flange using a faro arm,
however the link is dead, maybe someone who's a member might be able ask for a reupload of the file?
https://forum.miata.net/vb/showthread.php?t 312954
Edited to add: replace the space in the url with an equals sign, I can't post the link when the sign is in the text(possibly due to recent hacks
on the site)
Dave
[Edited on 7/1/26 by obfripper]
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obfripper
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| posted on 7/1/26 at 07:23 PM |
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Also had another thought, Clairetoo on here had put the mazda kl v6 on an mx5 gearbox in a fury and several mx5's , she may have or know of the
relevant cad files that you need.
Dave
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pigeondave
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| posted on 7/1/26 at 09:04 PM |
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Back in the wild west days of the internet I found some drawings. Thats why I thought it would be easy.
I have looked through my google drive and might have what you need.
U2U me your email and i'll ping over what I have.
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