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  #1  
Old 27th August 2016, 11:11 PM
JimH JimH is offline
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hi to all,a short intoduction I am 70 year old semi retired and just started to build a haynes roadster based on the chris gibbs book, in this project i am being assisted by my older brother! Progress so far, we have bought a mx5 and stripped it down,bought the book and downloaded the saturn plans.
The next step is to construct the chassis. This is where the questions start, I would like to use as many of the mx5 components has possible but after reading various comments on the forum it appears the is a problem with the mx5 diff in a chassis built to the saturn plans,would it be possible to strengthen the chassis in the area of the diff wings. Another possible solution I have considerd would be to use the mx5 rear subframe and modify the chassis to suit as anyone done ever done this if not why not. Any comments or advise on the above would be very welcome
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  #2  
Old 27th August 2016, 11:18 PM
SteveH SteveH is offline
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Welcome to the mad house
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  #3  
Old 27th August 2016, 11:46 PM
NeilW NeilW is offline
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Phil aka TalonMotorsport is the guy who can point you in the right direction. Not sure if he is still as active as he used to be but he designed a tmxr chassis (mx5 based). Try a search in the forum for previous mx5 builds there will be anything and everything for you to digest.

Welcome to the forum and best of luck with the build. Look forward to your progress
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  #4  
Old 28th August 2016, 06:21 AM
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vmax1974 vmax1974 is offline
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Hi and welcome

The problem people had with the diff was that they didn't mount the diff to compensate for the ppf on the mx5 this was solved on a few builds by changing the bushes for harder ones and almost hard mounting the diff nose

Phils solution is ok but if you are wanting to keep the components as standard as possible then maybe not for you
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  #5  
Old 28th August 2016, 04:43 PM
Ianr Ianr is offline
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On mine I put a sierra diff and book rear end in but used mostly MX5 for the rest of the build ie engine gearbox wiring and ecu steering column. I used engine mounts supplied by Phil at Talon and very good they seem. I have seen several solutions to use the diff from the MX5 and would probably use one of them if I built another.
Good luck with your build and welcome to the group!
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  #6  
Old 28th August 2016, 07:02 PM
garyt garyt is offline
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Hi and welcome. Life will never be the same for you both from now on
I used the mx5 diff et al and as said above mine is hard mounted nose and arms on the basis the Sierra diff was and is ok so mine is.
Good luck with the build and don't be afraid to ask questions the only daft one is the one you didn't ask
All the best Gary
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  #7  
Old 28th August 2016, 07:44 PM
Numplumb Numplumb is offline
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Hi and welcome check out Stot's thread for one idea of mounting diff.
Do a search for Saturn plans for the alterations to book spec for Mx5.
I used Mx5 diff and copied the front mount for the diff from one of the American sites, l also used the mx5 pedals on mine and mounted the diff 20mm further back than book spec which made the handbrake cables miss the frame, if you read some of the threads you'll see what I mean.
On mine I had the brackets made by Phil aka Talon Motor and used the Mx5 engine mounts.
Best of luck with your build.
Regards Mick.
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  #8  
Old 28th August 2016, 07:46 PM
Cropper Cropper is offline
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Hi, my diff is hard mounted on the nose & polyurethane bushes in the "wings", the diff unit pulled up solid on the bushes & i then made the nose bracket to suit, no problems so far. Depending on your donor you maybe lucky enough to get a limited slip diff as well! Enjoy!
Neil
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