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Gtm weights 
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Joined: Thu Jan 16, 2014 5:54 pm
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Post Gtm weights
Just weighed the b18c libra. Half a tank, few tools, jack and spare. No driver. 820kg.

Anyone else weighed theirs?


Fri Jan 22, 2016 2:58 pm
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Post Re: Gtm weights
octance wrote:
Just weighed the b18c libra. Half a tank, few tools, jack and spare. No driver. 820kg.

Anyone else weighed theirs?

No, but planning to get the corner weights done in the springtime so I could add them all together to get the total.

I thought the Libra (k-series) was supposed to be 750kg, not sure if that included the spare. I guess half a tank is 20kg, jack and tools could be 5kg. How much heavier is the honda engine? K series are very light - only about 99kg. Internet just old me the B18c is 136kg so that is 37kg of the difference!


Fri Jan 22, 2016 3:25 pm
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Post Re: Gtm weights
See 'Spring rate/length' page 2 in 'Libra and Spyder' for my corner weights.

Bob.

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Fri Jan 22, 2016 4:09 pm
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Post Re: Gtm weights
sanzomat wrote:
octance wrote:
Just weighed the b18c libra. Half a tank, few tools, jack and spare. No driver. 820kg.

Anyone else weighed theirs?

No, but planning to get the corner weights done in the springtime so I could add them all together to get the total.

I thought the Libra (k-series) was supposed to be 750kg, not sure if that included the spare. I guess half a tank is 20kg, jack and tools could be 5kg. How much heavier is the honda engine? K series are very light - only about 99kg. Internet just old me the B18c is 136kg so that is 37kg of the difference!



37kg is hell of a difference! I wonder if that is with the A/C, power steering too (things i don't have)


Bobs car was "Total weight [nearly full tank] 1791lb [814kg]"

Time to look into where I can save some weight!


Fri Jan 22, 2016 4:31 pm
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Post Re: Gtm weights
I think the 750kg came from the early Libras before the full trim kit with plain door cards, 1.4 engine, R65 gearbox, GTM seats. Probably no fuel, spare wheel etc.

Who has the heaviest car?

I remember Brian Twigg building a 1.4 8v Spyder that managed to tip the scales at over 1000kg!


Fri Jan 22, 2016 7:59 pm
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Post Re: Gtm weights
roger wrote:
I think the 750kg came from the early Libras before the full trim kit with plain door cards, 1.4 engine, R65 gearbox, GTM seats. Probably no fuel, spare wheel etc.

Who has the heaviest car?

I remember Brian Twigg building a 1.4 8v Spyder that managed to tip the scales at over 1000kg!



how was it sooooo heavy? :shock:

I wonder what the v6 ones weigh?


Fri Jan 22, 2016 8:42 pm
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Post Re: Gtm weighing
I had mine weighed at a local weighing bridge with a full tank, spare wheel etc but no body inside and they said it was 737kg (potential chance of the weights being tweaked to reduce weight prices :wink:). In fairness I thought it would be in the low 800's any ways but was going to weigh it again when I road tax it as I won't drive it in the winter

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Fri Jan 22, 2016 11:24 pm
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Joined: Sun Oct 19, 2014 10:10 pm
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Location: Bristol
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Post Re: Gtm weights
roger wrote:
I think the 750kg came from the early Libras before the full trim kit with plain door cards, 1.4 engine, R65 gearbox, GTM seats. Probably no fuel, spare wheel etc.

Who has the heaviest car?

I remember Brian Twigg building a 1.4 8v Spyder that managed to tip the scales at over 1000kg!


Having just removed a R65 in favour of a PG1 I'd say (from feel alone) the the R65 is heavier? Someone will probably come on here with some hard facts to prove me wrong! I'd also say the rattle rods and linkages are heavier than the the cables? at a guess I'd say a PG1/cable set up would be about 10kg in total lighter than a R65/rod.

I think also that the smaller K series are heavier than the bigger capacity ones - the castings are the same but the liners are thinner. The VVC mechs probably cancel that out though although I'm sure I read that the VVC is 99kg and the 1.4 twin cam is 102kg.


Sat Jan 23, 2016 11:31 am
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Post Re: Gtm weights
Choice of wheels makes a big difference, compomotive MOs for example are very heavy, most of the team dynamics ones seem pretty light

Ermmmm, choice of battery - buying a lithium one could chop a chunk of weight off instantly but beware if you use an optimate or similar you cannot use a normal one on a lithium battery.

Shocks - steel gaz are much heavier than protech

I'll have a to get my Honda libra weighed when it's done

Still can't see how Brian managed to make his weigh so much, from memory I think all his water hoses were fully made from copper and solder jointed! Were the spyders generally heavier anyway from additional strength in the tub from losing the roof?

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Wed Mar 09, 2016 8:52 am
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Post Re: Gtm weights
I've read that the Spyder tub is 30Kg heavier than the Libra tub. Quite a bit of glass and resin!


Wed Mar 09, 2016 2:26 pm
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Joined: Sat Oct 22, 2016 12:41 am
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Location: Brisbane Australia
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Post Re: Gtm weights
yazza54 wrote:
. . . Shocks - steel gaz are much heavier than protech . . .
Anyone know how much heavier? The Gaz springs are probably heavier too (bigger diameter?)


Thu Feb 11, 2021 7:46 am
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Joined: Wed Feb 09, 2011 1:12 am
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Post Re: Gtm weights
L have just weighed my old type protec rear the one with narrow section at the bottom just weighed the shock and the bottom adjustable spring seat no spring or top cup was 1.45 kg would expect the current protec design to be more but not sure no idea what gaz would be


Sat Feb 13, 2021 2:55 pm
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Post Re: Gtm weights
Gaz/Avo use 1.9" ID springs which is smaller than protech ones I think?

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Sat Feb 13, 2021 4:15 pm
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Joined: Sat Oct 22, 2016 12:41 am
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Post Re: Gtm weights
Protech website lists 1.9" and 2.25" ID. Couldn't see which are standard on Libra/Spyder shocks.

Didn't realise GAZ were 1.9". Thanks - I will check mine.


Mon Feb 15, 2021 10:29 pm
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Post Re: Gtm weights
I thought gaz and Protech were 2.25 but not not sure will have measure Protech tomorrow also have atr rears but on car at moment so will have to wait till i have time to take one off to weigh it would expect it same or less than Protech


Mon Feb 15, 2021 11:04 pm
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