how light is your puma

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Re: how light is your puma

Postby Noobrider » Tue Nov 18, 2014 8:27 pm

not weighed it but I reckon it should be around the 900kg at the moment...I have no excuse either...a mate 100yards up the road has a weigh bridge
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Re: how light is your puma

Postby tuonokid » Tue Nov 18, 2014 10:15 pm

Hi Kizza
I think you'll struggle to get to near 700kg as my (heavy) road trimmed Westy weighs about 700kg fuelled up.
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Re: how light is your puma

Postby grayfox » Tue Nov 18, 2014 11:13 pm

With a rough tote up of everything thats come out incl spare wheel and difference in weight of seats (only few kgs) steering wheel, lightweight wheels - approximately 950kg that incl removal of all trim and interior, rear wiper motor, suspension top weights, all sound deadening, arch carpets and gutting doors.

Can only realistically see 900kg and below happening with a combination of either poly windows, Fibreglass/Carbon panels and removal of AC, plus maybe going too far with a holesaw.
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Re: how light is your puma

Postby gingerdave » Wed Nov 19, 2014 12:13 am

700 kilos? Matey that's light even for an Elise.Most s1 Elise drivers are happy with 735 kilos
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Re: how light is your puma

Postby Ziggy » Wed Nov 19, 2014 2:33 pm

You'll never get to 700 Kg unless you go for a carbon fibre monocoque. I expect sub 800 KG is possible with a lot of carbon fibre parts including all openings and loads of custom parts made in non standard materials.

How much do each of your lightweight panels save ? ditto lightweight rad / fan ?

I suspect it will get exponentially more expensive the lighter you go.
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Re: how light is your puma

Postby PumaJay » Wed Nov 19, 2014 2:45 pm

Not sure what mine weighs... need to get it on the weigh bridge at work.

If I was going to make it any lighter id want to be taking all the weight out of the front, the rear is light enough, id like to get...

fibreglass wings
fibreglass bumper
polycarb windows
tubular wishbones

and id also like to make a tubular front end, cut the slam panel and front cross member out and fabricate my own light weight version.
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Re: how light is your puma

Postby trublustu » Wed Nov 19, 2014 2:47 pm

I`ve seen a european manufacturer of carbon doors, wings, rooves etc.
The costs were extravagant but they are in the featherweight class.

I am always looking to strip another few grammes, but I`d be happy to get it to 850
I recon to get under 800kg would take some serious work
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Re: how light is your puma

Postby PumaJay » Wed Nov 19, 2014 5:10 pm

yeah I think anything below 850kg would be quite an achievement, i have been tempted to just start drilling holes everywhere to try and lighten the load abit!
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Re: how light is your puma

Postby RyanG » Wed Nov 19, 2014 10:11 pm

Our race puma is now 880kg with all steel panels allbeit chopped a little lol
Still has a glass rear window and half a dash
I would say 840 with fibreglass panels it just depends how far you go, if you can get fibreglass doors and a carbon roof you would be 820's id say :)
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Re: how light is your puma

Postby warrenpenalver » Thu Nov 20, 2014 12:59 am

It would be interesting to see if with a full weld in cage you could save more than the weight of the cage by cutting out basically all the inner frame work around the roof, b and c pillars etc. Just weld in some thin gusset strips to prevent the outer panels flexing too much.
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Re: how light is your puma

Postby PumaJay » Thu Nov 20, 2014 8:14 am

I think you'd need to remove a fair amount of metal to account for the weight of the cage. Although if the cage is done properly and goes through to the front suspension tops then you could remove and awful lot with out losing any strength.

Im just keen to try and get some weight off the front end of my car.
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Re: how light is your puma

Postby Ziggy » Thu Nov 20, 2014 2:32 pm

trublustu wrote:I`ve seen a european manufacturer of carbon doors, wings, rooves etc.
The costs were extravagant but they are in the featherweight class.


would love to see these, have you got a link ?
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Re: how light is your puma

Postby warrenpenalver » Thu Nov 20, 2014 5:54 pm

PumaJay wrote:I think you'd need to remove a fair amount of metal to account for the weight of the cage. Although if the cage is done properly and goes through to the front suspension tops then you could remove and awful lot with out losing any strength.

Im just keen to try and get some weight off the front end of my car.


52kg for a cds welded cage - about a quarter less if T45.

Ties into suspension mounts and floor so body just keeps the rain off. Inside each rear quarter is heavy double skinned panels, also internal panelling all around door top, B pillar, c pillar, above boot, around boot area etc.

Get youself a hole saw and hole swaager and you can cut weight out of the panel below windscreen on inside, bottoms of doors etc. Front crossmember could be replaced with alloy tubing to support radiator.
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Re: how light is your puma

Postby RyanG » Thu Nov 20, 2014 6:27 pm

warrenpenalver wrote:
PumaJay wrote:I think you'd need to remove a fair amount of metal to account for the weight of the cage. Although if the cage is done properly and goes through to the front suspension tops then you could remove and awful lot with out losing any strength.

Im just keen to try and get some weight off the front end of my car.


52kg for a cds welded cage - about a quarter less if T45.

Ties into suspension mounts and floor so body just keeps the rain off. Inside each rear quarter is heavy double skinned panels, also internal panelling all around door top, B pillar, c pillar, above boot, around boot area etc.

Get youself a hole saw and hole swaager and you can cut weight out of the panel below windscreen on inside, bottoms of doors etc. Front crossmember could be replaced with alloy tubing to support radiator.




Only problem with this Warren is if you are in any sort of race series, or your puma becomes a race car at a later date, the scrutineers can be very picky about internal skins being cut and removed
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Re: how light is your puma

Postby warrenpenalver » Fri Nov 21, 2014 4:15 pm

For a race series i see your point.... but youd have to be mad not to consult the scruntineer if you are racing and doing such mods.

Track days its less important.
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Re: how light is your puma

Postby gingerdave » Fri Nov 21, 2014 9:20 pm

Funny coincidence a guy on SELOC (a lotus forum) has just had his S1 on a weighbridge.The car has standard interior,which ain't much :grin: car has a turbocharged K series engine an Exige bodykit not too special wheels and it weighs 762 kilos.So think you are gonna struggle even to match that.Think my S2 Exige with some trim removed a very light 2ubular exhaust weighs 880 kilos.
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Re: how light is your puma

Postby Scott134 » Thu Jan 01, 2015 10:44 pm

Saw this posted on the track day puma FaceBook group today ... This guy apparently has an Autograss Puma. Not sure if he's on here but hope he doesn't mind me re-posting his photos. I just think it looks awesome. Just like you mentioned above, using the cage for strength and removing all metal. The rear quarters have Kizza's fibreglass skin on the outside and all the inside cut away. He's also taken a lot of the floor out from the look of the second pic. I got lots of inspiration from this. Hope it does the same for others!

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Re: how light is your puma

Postby gingerdave » Fri Jan 02, 2015 12:05 am

That looks a bit fragile to me .Would not fancy a side impact at a trackday by anything weighing more than 50 grams :grin:
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Re: how light is your puma

Postby TGPlayer1 » Fri Jan 02, 2015 1:13 pm

The rollcage is providing all the support removed from the body.

When i bought my seats the chap i got them off used to do autograss (had those seats in a Pug IIRC) and he was saying that all the Pumas were like that; no body panels, half the back end cut off, holes in the floor etc. So i guess it works.

I would probably do that myself just for laughs, see if it's still road legal and go shopping in it haha.
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Re: how light is your puma

Postby PumaJay » Tue Jan 27, 2015 8:24 am

I dont think id go that far for a road/track car, imagine the noise of driving something that extreme on the road, most track cars become comprimised road cars but that would take things to the next level!

Shaving weight can become a bit obsessive, at some point its easier just to go for power!
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Re: how light is your puma

Postby trublustu » Tue Jan 27, 2015 9:08 am

Bit of both is a happy compromise...
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Re: how light is your puma

Postby gingerdave » Tue Jan 27, 2015 10:17 am

PumaJay wrote:I dont think id go that far for a road/track car, imagine the noise of driving something that extreme on the road, most track cars become comprimised road cars but that would take things to the next level!

Shaving weight can become a bit obsessive, at some point its easier just to go for power!

Noise you can get around that on the road with earplugs.If you run a very aggressive geo that can be a pain due to tramlining.Also if you run track brake pads (something like CL rc6 ) the noise gets a bit tiring.And of course semi sliks can be arse clenching in heavy rain on a busy motorway.Apart from that can't see the problem :lol:
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Re: how light is your puma

Postby Scott134 » Sat Jan 31, 2015 11:27 pm

Don't forget that weight saving is not all about straight line speed though. So while I agree that after a point more power is easier and cheaper than extreme weight saving, less weight can also improve handling and braking, as well as acceleration. I'm all for taking a track-only car to the extremes to see what can be done but I agree completely that for a road car there has to be compromises. Mine was pretty tiring on the road and that was before anything too serious in terms of weight saving! Lol
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Re: how light is your puma

Postby Andrew Hebron » Wed Mar 04, 2015 2:13 am

I'd be quite interested, having stripped mine right out, put bucket seats in, poly windows, cut-down dash, removed heater etc. But then I've stuck 56kg cage in it and sumpguard, tank guard and floor guards underneath. I have a sneaking suspicion it will actually be heavier.
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Re: how light is your puma

Postby adrianm » Mon Aug 17, 2015 2:27 pm

Thing to remember with a lot of race series is that they have a minimum weight as well as regs on cutting floorpans etc.

Mine weighs 850kg dry but the class I race in has a minimum weight of 1050kg so lots of lead bolted to the floor, fat driver and 3/4 of tank of fuel to get there.
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