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Wheels 
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Part built GTM

Joined: Wed Apr 15, 2015 4:52 pm
Posts: 141
Location: Devon
GTM: Libra
Post Wheels
Going through the car
I will report the track and camber settings when finally done and when driving is good.
I have 7 x 17 Compomotive wheels
Do you guys think 16s are better
If so where can they be bought at a sensible price
Seems the Metro / MGF wheelnut spacing makes them expensive

Pete


Thu Apr 30, 2015 7:55 pm
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Part built GTM

Joined: Wed Apr 15, 2015 4:52 pm
Posts: 141
Location: Devon
GTM: Libra
Post Re: Wheels
Sorry - not quite on topic but info needed
Are the brakes in the Libras heavy or light
Seems the servo is working but heavy pedal
Servo appears to be working and I think they either work or don't
Part number or model of servo would be appreciated


Thu Apr 30, 2015 8:49 pm
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On the Road

Joined: Wed Aug 11, 2010 9:27 am
Posts: 619
Location: Sheffield
GTM: Libra
Post Re: Wheels
Pull the vac tube off the servo and see if you're getting a decent pull off the engine with it running.

Is the servo corroded on top at all around where the master cylinder fits? There is an O ring sealing the master to servo. I found mine had corroded around there and water had got inside the servo so obviously that means it would leak air too. I kept the o ring seal but also added a rubber gasket (same shape as the master's 'foot') cut from some rubber gasket sheet for a better seal.

If you have standard metro front/rover rear brakes they are a bit poor I found. I fitted MGF 304mm discs and 4 pot calipers on the front and it gives better feel IMO.

I'm also looking at putting bigger discs & different calipers on the rear to match - currently looking at around 280mm discs with 2 pot calipers with separate mech handbrake calipers.

Servo is the one from the late metro/rover 100 series as is the master cylinder.

Have you checked that none of the calipers are seized etc and all function ok?

SAS

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2000 GTM Libra 1.8VVC 145BHP


Fri May 01, 2015 11:22 am
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GTM Nirvana
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Joined: Sun Oct 19, 2014 10:10 pm
Posts: 1136
Location: Bristol
GTM: Spyder
Post Re: Wheels
I've not checked my servo but I think its okay. My brakes need a fair shove on the pedal but when I've got used to the pressure needed they work fine. With no ABS I quite like having to push hard as it makes it less likely I'll lock up. I'm going to check the servo is working though.


Fri May 01, 2015 1:35 pm
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Part built GTM

Joined: Wed Apr 15, 2015 4:52 pm
Posts: 141
Location: Devon
GTM: Libra
Post Re: Wheels
I have the MGF front 4 pots
Servo looks pretty rusty and old
I will source a better Rover 100 unit
The brakes do work but need too much shove to be comfortable
All pads replaced and all calipers working well.


Mon May 04, 2015 6:42 pm
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GTM Nirvana
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Joined: Sun Oct 19, 2014 10:10 pm
Posts: 1136
Location: Bristol
GTM: Spyder
Post Re: Wheels
If you have the 4 pot calipers then I've a feeling you may have to stick with the 17" rims as I'm not sure they fit inside smaller wheels? I expect someone will come along and say you can though!


Mon May 04, 2015 7:53 pm
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Ready for SVA

Joined: Sun Apr 04, 2010 10:11 pm
Posts: 286
Location: Cwmbran, South Wales
GTM: Libra
Post Re: Wheels
Sure enough, your right.
I have the 305mm discs and 4pots on mine with 16" wheels on the front and fits fine with no spacers but probably depending on your wheel offsets that spacers may be required

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Colin


Spin up the Rotrex

GTM Libra Honda 2.0l rotrex type r
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Mon May 04, 2015 11:19 pm
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GTM Nirvana
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Joined: Sun Oct 19, 2014 10:10 pm
Posts: 1136
Location: Bristol
GTM: Spyder
Post Re: Wheels
Whilst on the subject of wheels I'm thinking about getting a set of cheap 15" alloys to use with track day tyres as they seem to be much cheaper in 15" than 16". There seem to be plenty of slightly ratty MGF 15" rims on fleabay - anyone know if they the right offset (or close enough)?


Tue May 05, 2015 8:11 pm
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On the Road

Joined: Wed Aug 11, 2010 9:27 am
Posts: 619
Location: Sheffield
GTM: Libra
Post Re: Wheels
15s won't fit over the 4pots.

SAS

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2000 GTM Libra 1.8VVC 145BHP


Tue May 05, 2015 8:35 pm
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GTM Nirvana
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Joined: Sun Oct 19, 2014 10:10 pm
Posts: 1136
Location: Bristol
GTM: Spyder
Post Re: Wheels
Mine aren't four pots. There seems to be plenty of room inside the 16" rims already on there, its just the offset I was wondering about


Tue May 05, 2015 8:49 pm
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Part built GTM

Joined: Wed Apr 15, 2015 4:52 pm
Posts: 141
Location: Devon
GTM: Libra
Post Re: Wheels
Offset compared to MGF is the question
Have price coming to refurb the 17s
Unless MGF wheels do fit then after market alloys to the PCD needed are costly
Info about MGF offset would be really good


Tue May 05, 2015 9:22 pm
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Part built GTM

Joined: Thu Jan 23, 2014 10:26 pm
Posts: 73
GTM: Libra
Post Re: Wheels
According to the god of google the offset for the MGF / TF is 30-35mm.

There is some good info on this site : http://www.mgf.ultimatemg.com/group2/su ... he_mgf.htm

Check out the range of weights!

Some older posts from this wery forum too which are relevant : libra-gtm-wheels-304mm-disc-ap-racing-4pot-t2703.html

Refurb should be 35-40 per wheel. Take the opportunity & get them to fit your nice new spangly tyres so you effectivley get them fitted free! Ideal if you sourc the tyres from mytyres, black circles or camskill as supply only.

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StewB

'09 Libra K20
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Ex Libra V6


Tue May 05, 2015 9:39 pm
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Ready for SVA

Joined: Mon Feb 09, 2009 12:11 pm
Posts: 317
GTM: Libra
Post Re: Wheels
I run mgf 15" alloys with 195/50/15 winter tyres on my libra through winter fit over my rover 200 brakes.
Matty


Wed May 06, 2015 3:10 pm
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GTM Nirvana
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Joined: Sun Oct 19, 2014 10:10 pm
Posts: 1136
Location: Bristol
GTM: Spyder
Post Re: Wheels
Great, I've found a set of four MGF 15" rims for £50 (pick up only). I'm thinking I'll get these and use for track day tyres as things like R888s seem fairly reasonable in 15" but twice the price in 16" and there are quite a few second hand slicks in 15" but I've not seen any in 16".

Also if the rims are a bit rough it doesn't matter if I catch them on stuff.

Will probably then find my suspension isn't up to slicks without ARBs but that can be next years upgrade!


Wed May 06, 2015 8:18 pm
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