New Member F41 GTM Automatic to Manual Conversion
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Zagato
Part built GTM
Joined: Sun Jan 19, 2020 8:46 am Posts: 65
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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 I will have some specific questions regarding the conversion to manual, but thought I would say hi first My name is Nick and I live in Kent.
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E5FBD785-7579-42AA-9C28-79E71D7B516D.jpg [ 554.72 KiB | Viewed 15838 times ]
Last edited by Zagato on Tue Feb 11, 2020 9:30 am, edited 1 time in total.
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Sun Jan 19, 2020 9:00 am |
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sanzomat
GTM Nirvana
Joined: Sun Oct 19, 2014 10:10 pm Posts: 1138 Location: Bristol GTM: Spyder
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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
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Sun Jan 19, 2020 10:44 am |
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roger
Ready for SVA
Joined: Sat Feb 14, 2009 6:06 pm Posts: 389
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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.
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Sun Jan 19, 2020 12:01 pm |
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sanzomat
GTM Nirvana
Joined: Sun Oct 19, 2014 10:10 pm Posts: 1138 Location: Bristol GTM: Spyder
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Re: New Member F41 GTM
Loving your car collection by the way - I wish my garage was like that!!
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Sun Jan 19, 2020 12:02 pm |
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Zagato
Part built GTM
Joined: Sun Jan 19, 2020 8:46 am Posts: 65
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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
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Sun Jan 19, 2020 5:01 pm |
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Zagato
Part built GTM
Joined: Sun Jan 19, 2020 8:46 am Posts: 65
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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.
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Sun Jan 19, 2020 5:06 pm |
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roger
Ready for SVA
Joined: Sat Feb 14, 2009 6:06 pm Posts: 389
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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.
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Sun Jan 19, 2020 5:14 pm |
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Zagato
Part built GTM
Joined: Sun Jan 19, 2020 8:46 am Posts: 65
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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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Elansprint
Looking like a GTM
Joined: Sat Mar 12, 2016 7:05 pm Posts: 217
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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
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Sun Jan 19, 2020 5:27 pm |
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Zagato
Part built GTM
Joined: Sun Jan 19, 2020 8:46 am Posts: 65
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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.....
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Mon Jan 20, 2020 12:07 am |
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sidewinder
On the Road
Joined: Wed Aug 11, 2010 9:27 am Posts: 621 Location: Sheffield GTM: Libra
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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
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Mon Jan 20, 2020 1:14 pm |
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Elansprint
Looking like a GTM
Joined: Sat Mar 12, 2016 7:05 pm Posts: 217
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Re: New Member F41 GTM
Ignore me mate the F is on the wrong end for that Ian
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Mon Jan 20, 2020 5:56 pm |
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Zagato
Part built GTM
Joined: Sun Jan 19, 2020 8:46 am Posts: 65
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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!
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Tue Jan 21, 2020 7:47 pm |
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sanzomat
GTM Nirvana
Joined: Sun Oct 19, 2014 10:10 pm Posts: 1138 Location: Bristol GTM: Spyder
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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.
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Tue Jan 21, 2020 9:55 pm |
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sanzomat
GTM Nirvana
Joined: Sun Oct 19, 2014 10:10 pm Posts: 1138 Location: Bristol GTM: Spyder
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Re: New Member F41 GTM
http://www.gtmdrivers.com/forum/post22066.htmlLink 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!
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Tue Jan 21, 2020 10:05 pm |
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