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Old 05-31-2014, 12:08 AM   #1
adm
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Default mx5 sr20det conversion speedo help!!

hi everyone

after a long build I hav gotten stuck with my speedo in my na8 mx5 lol , I have finished a sr20det conversion, the car is running and amazing!!, only thing i need to do to is get the speedo working

the factory mx5 speedo is cable driven but the sr20 5 speed gearbox out of a s13 uses a electronic digital speed sensor

has anyone who has done this conversion found a way to use to get the standard speedo to work with the sr box?

cheers!!
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Old 05-31-2014, 12:31 AM   #2
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heres a pic
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mx5 sr20det conversion speedo help!!-20140317_171708.jpg  
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Old 05-31-2014, 12:50 AM   #3
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You might have better luck with an NB speedo, they're electronic. No idea if you'd be able to get the two to talk though.
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Old 05-31-2014, 02:11 PM   #4
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Why not run an s13 speedo into a custom cluster? More work and more parts but youd know it would work. Very clean setup btw.
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Old 05-31-2014, 07:45 PM   #5
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I think custom clusters never look good although the kg works one is pretty cool but I would prefer to use the standard cluster I have all the other gauges working

I have read that you can use a ca18det cable drive in the sr box and get a cable made to suit the mx5 cluster I might try that first, just hope it will read the correct speed, if anyone could comfort that works will save me some mucking around
cheers!
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Old 05-31-2014, 08:09 PM   #6
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This is something along the lines of what I want in my car. But I doubt your car is stripped like mine. Lol

mx5 sr20det conversion speedo help!!-forumrunner_20140531_180852.png
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Old 07-12-2014, 06:56 AM   #7
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Hi,
Did you ever solve this problem? I have the same conversion and would like to use the original speedo.
I wonder if I could fit the guts of an NB speedo (but how would it get the signal)?
Ta
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Old 07-12-2014, 10:57 PM   #8
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I've seen info where some people have used S12 mechanical drive speedo senders on S13 transmissions when they swap SR20s into the older chassis.

Example:

Club-S12 - 10th Aniversary - Speedo pinion assemble - now with pics
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Old 07-18-2014, 06:44 AM   #9
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That link doesn't really give an answer (the results were hit and miss).
I'm thinking an NB dash may be the go (but info says it's a heap of splicing).
Maybe just the NB speedo (electric) alone, but will it talk to the Nissan gbox sender?
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Old 09-04-2014, 05:08 AM   #10
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for anyone who wants to get their speedo working, Dakota digital makes a product called a ecm-100 (link below) that will allow you to use an electronic speed sensor with a cable driven speedo, its made for gm cars so you will need to get a custom speedo cable made as well but it will work!

ECD-100
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