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New Member F41 GTM Automatic to Manual Conversion 
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Part built GTM

Joined: Sun Jan 19, 2020 8:46 am
Posts: 65
Post New Member F41 GTM Automatic to Manual Conversion
Hi there,
I have just purchased an automatic Libra F41 GTM.
It will not be staying CVT because it doesn't suit the character of the car.
When driving it sounds like the driver is a complete bell end revving the nuts out off the car :D
I will have some specific questions regarding the conversion to manual, but thought I would say hi first :oops:
My name is Nick and I live in Kent.


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Last edited by Zagato on Tue Feb 11, 2020 9:30 am, edited 1 time in total.
Sun Jan 19, 2020 9:00 am
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On the Road
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Joined: Sun Oct 19, 2014 10:10 pm
Posts: 927
Location: Bristol
GTM: Spyder
Post Re: New Member F41 GTM
Hi and welcome. Looks like a nice car. I tend to agree on the CVT - what were they thinking! Hopefully not too hard to swap over. I guess the things to consider are how the gearbox end mounts to the frame - might need a new mounting to suit the PG1 and the ones that GTM originally supplied are not available. Can be made though as that is what I did when going from R65 to PG1.
Gearchange - probably easiest to go for the MGF cable change but there other options. In my experience a PG1 gearbox from a TF (ideally VVC for the lower final drive ratio) coupled with MGF gear cables workes best as the TF gearbox bellcrank comes forward (MGF goes bakwards) so the MGF cables are long enough to reach the TF bellcrank.
Other than that, I have a vague notion that the ECU is different but that could be nonsense!
Good luck


Sun Jan 19, 2020 10:44 am
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Joined: Sat Feb 14, 2009 6:06 pm
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Post Re: New Member F41 GTM
Looks like a lovely car.

I agree with Sanzomat with the MGF/TF gearchange. I might go a step further if budget allows and go to Mike Satur for his Slickshift. They give a fantastic shift quality, better than standard or Elise.


Sun Jan 19, 2020 12:01 pm
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Location: Bristol
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Post Re: New Member F41 GTM
Loving your car collection by the way - I wish my garage was like that!!


Sun Jan 19, 2020 12:02 pm
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Part built GTM

Joined: Sun Jan 19, 2020 8:46 am
Posts: 65
Post Re: New Member F41 GTM
Haha
No that isn't my collection or garage!
That is the dealer 'Total Headturners' in Essex where I bought the car.
Thanks for the suggestions re gearchange.
I'm not sure if I can just change the flywheel, l believe the crank sensor has to see a certain pattern or it won't run and there are different flywheels.....
I don't think the CVT had a special ECU but I might be wrong.
Is the pedal box from a Rover 100? It looks like the clutch pedal pivot is there, all I need is a clutch pedal :D


Sun Jan 19, 2020 5:01 pm
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Part built GTM

Joined: Sun Jan 19, 2020 8:46 am
Posts: 65
Post Re: New Member F41 GTM
BTW the car was factory built at GTM with the CVT and the original owner's wife had a disability.
So it was speced like this for a reason but it ruins the driving pleasure of a sporty car.
It is very rare with CVT but not desirable to anyone to keep this way.


Sun Jan 19, 2020 5:06 pm
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Post Re: New Member F41 GTM
Pedals are GTM mixed with Metro/Rover 100 for the Master cylinders and servo. Hydraulic clutch uses MGF master and slave.


Sun Jan 19, 2020 5:14 pm
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Part built GTM

Joined: Sun Jan 19, 2020 8:46 am
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Post Re: New Member F41 GTM
My engine appears to be a 1.6 and seems healthy enough.
It's also nicely detailed.
Please excuse the poor photo!


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Sun Jan 19, 2020 5:19 pm
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Looking like a GTM

Joined: Sat Mar 12, 2016 7:05 pm
Posts: 163
Post Re: New Member F41 GTM
Nick I looked at this car couple of years ago and it was in nice condition apart from one large star crack on the nearside rear. Was interested for my wife as she only likes auto but could not get in and out easily. Thought about converting like you but bought a V6 in the end. Are you road tax free with that reg ? Good luck with the conversion
Ian


Sun Jan 19, 2020 5:27 pm
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Part built GTM

Joined: Sun Jan 19, 2020 8:46 am
Posts: 65
Post Re: New Member F41 GTM
Hi Ian and thanks,
Why would the car be road tax free with a vanity plate?
The plate is a nice bonus but I don't think it has any road tax advantages.....


Mon Jan 20, 2020 12:07 am
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Joined: Wed Aug 11, 2010 9:27 am
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Location: Sheffield
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Post Re: New Member F41 GTM
I think you're gonna be better off changing to a different engine altogether.

_________________
2000 GTM Libra 1.8VVC 145BHP


Mon Jan 20, 2020 1:14 pm
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Looking like a GTM

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Post Re: New Member F41 GTM
Ignore me mate the F is on the wrong end for that
Ian


Mon Jan 20, 2020 5:56 pm
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Part built GTM

Joined: Sun Jan 19, 2020 8:46 am
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Post Re: New Member F41 GTM
Would I have to change the whole loom or just the engine loom to fit a VVC?
I could be persuaded if it were the later!


Tue Jan 21, 2020 7:47 pm
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Location: Bristol
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Post Re: New Member F41 GTM
Just the engine loom. In the 5 years since I bought my Spyder I've changed from a Mems3 1.6 (with R65 gearbox and rod change) to a Mems2 VVC143 with PG1 and cable change and now to a Mems3 VVC160 (it was originally built with a 1.4 and R65), each time just using the engine loom that came with each engine and mating it to the GTM body loom. It isn't too hard and if you do want to go down that route there is a very useful spreadsheet giving wire by wire advise on what to connect to what somewhere on the forum. I can't take credit for it but I think I've got it downloaded if you can't find it.


Tue Jan 21, 2020 9:55 pm
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Location: Bristol
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Post Re: New Member F41 GTM
http://www.gtmdrivers.com/forum/post22066.html

Link from Juls in fourth post down in this thread. There was only one wire that this spreadsheet got wrong for me - the 5AS to ECU handshake wire is apparently blue/slate on an MG ZR engine loom (what this spreadsheet is based on) but yellow/red on an MG TF engine loom!


Tue Jan 21, 2020 10:05 pm
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