Lightest Cayman S - Page 5 - Boxster/Cayman - PistonHeads UK

Hello I currently have a 293hp lotus elise honda s1 but I would like to change. I would like a rear center engine and a very low weight, so a light race prerared Porsche Cayman S (between 2006 2009) could be a good deal but how light can it be ? Keeping it barely road legal (means keep lights for example) and with safety devices (as a roll cage) I'm not asking "how to" (I know how to) but I just would like some numbers. Unfortunately I could not find an answer on the web whereas there is goog threads on others car. If I want to change it´s because I'm very tall and I dont fit well in my elise. I already had a stock Cayman S by the past and they are great cars. In France there is a championship call "cayman cup", cars weight 2843lbs (1290kg) but it´s not the lightest possible from far and it´s too heavy in my opinion. Hope you will be able to help me as always on pistonheads. Vive l'Angleterre ! Thanks Frédéric from France

Cayman R with a little bit of stripping perhaps 1150kg. Others on here will know better.

http://www.specialistvehiclepreparations.com/porsc... http://www.autometricsmotorsports.com/uncategorize... http://www.pistonheads.com/classifieds/motorsport/...

Hard to say. you can fit Carbon doors, lipo battery, ti exhaust, plexi glass, Carbon race seats, and rip every thing out etc it's all about money. weights not that much an issue with the gen 2 engine imo if you aim for 1200kg and 350 bhp. but add a cage back in and all that has been wiped out ! you can even spend 5k on wheels to make them only 7kg each ! or 15k to fit Ceramic disks. People on here are more about adding weight ;-p, get those heated seats in ,AC and a nice Bose system. Edited by mrdemon on Sunday 23 February 16:57

I know the first and the third, spoke to both of the sellers yet. First one says we can easily make it 1100kg but I want to check. My question still on...if someone who knows pass by. Thanks for your contribution ! Edited by Cayman48 on Sunday 23 February 17:11

Ask the guys at RPM what this one weighs: http://www.rpmtechnik.co.uk/sales/vehicle/cayman-s...

I asked already on Friday, too heavy !

have you spoke to Specialist Vehicle Preparations? https://twitter.com/JethroBovingdon/status/4358197...

The Hartech Boxster S I raced runs at 1275kgs [/i]including the driver[/i] as this is the minimum race finish weight allowed. I'm just over 90kgs with racesuit, helmet, HANS etc The weight could be reduced with: lightweight hardtop (not relevant to Cayman obviously) carbon fibre doors (from Cup car) carbon fibre wings (Cup car?) remove headlamp innards and replace with small bulb holders remove doorcards remove dashboard remove centre console remove aluminium bumper bars (the crash structures that sit behind the PU bumper covers) fit lighter weight wheels remove boot & bonnet hinges and struts (replace with pins) Lithium motorsport battery (£2500 though) remove handbrake remove heater matrix & plumbing drill holes in suspension components (with care!) custom titanium exhaust me going on a diet The car already has a full cage, extinguisher and 1 seat/harness, perspex windows (inc hardtop) & lightweight bonnet & boot, window mechanisms, central locking & airbags removed. I hope that helps.

To I know Joseph : Yes I spoke to SVP last week, they say they can make it 1100kg easily and barely streetable (but it's what I'm looking for). Despite I want to believe them as I'm more of a guy who believes what people say (unless I know that I'm speaking to an idiot), I'm Doubtful. So I want to make sure. I would be very happy with 1100kg WITHOUT DRIVER, they even told me they have a race car at 950kg !! but no lights and so on... To The Goose :This is an answer I like. Would you be able to guess an approximate minimum weight ? Does 1100kg or less seems doable for you ? Your rules says 1275kg minimum wich is almost the same as Porsche french Cayman cup championship (1290kg). Thanks for your contribution to all of you. Edited by Cayman48 on Monday 24th February 13:16

I have just started to strip my Cayman S. I am doing this in association with SVP, and will eventually end up with a road legal hill climb / sprint car. We are aiming for the SVP target of 1100 KGS, with a 3.7 litre engine. This will include a full FIA cage, 2 x race seats. I'll post a few photos as the build progresses. We aim to be competing in 6-7 weeks with the standard engine, then fit the 3.7 after we have run the car a few times.

Lucky me you passed by, You are doing exactly what I want ! let me know how is it going Thanks a lot

Its lighter now!!

Lot of work left to do ! And so you can delete AC without bothering...

Car almost finished. Ran at first event this weekend, and went well. Certainly lighter than standard!! Still have to fit alloy door cards..and seat for wife!

The wife will just add weight. Looks great though!

I like it too ! Do you think it's possible to make it weight 1000kg keeping it barely road legal ?

I have stripped as much as I can. Aircon pump, Aircon rads, Heater, lower dash, sat nav, all interior, except part of door cards, and all other trim bits. It has lightweight seats, new wheels, lightweight flywheel, sports exhaust, new suspension, LSD. Do all this and you have a much lighter car. But then I wanted a full race rollcage, as we are competing in the car!! Next winter we will go lightweight with all the panels, which should make a big difference. The loom is the big weight, so we will change that as well. I don't think you would get a 1000 kilo road car, but give it a try and let us know.

We got our NSX down to 1000kg; surely you can get a little Cayman there!

Westwood 35 any updates / infos ?

The car has been completed for this season, with further work scheduled for next winter. Numbers are on the car because it is out this weekend!!

nice what did it weigh in at.

1230 Kilos at the moment, but we will take another 100-120 kilos over the winter.

Lightweight tailgate available on eBay too item no. 221354902336

They are the company that did all the work on the car, SVP Droitwich. With lightweight doors, wings, boot and plastic windows it was going to blow this years budget!!!! Wiring loom is the next big project, along with 3.7 litre engine.

westwood35 said: Numbers are on the car because it is out this weekend!! What type of events do you do?

Hillclimb and sprints. Mainly the Midland hills and the odd circuit sprint. Two day meeting at Prescott Hillclimb this weekend.

very nice. love to have one/do one.

westwood35 said: Hillclimb and sprints. Mainly the Midland hills and the odd circuit sprint. Two day meeting at Prescott Hillclimb this weekend. Very nice and a rare sight on the hills. It must be quite competitive given what you've done with it. I've taken my CS on track a couple of time and love the balance of the car. I also compete in sprints and hillclimbs but in an Evo, mainly in the SW championship.

westwood35 said: 1230 Kilos at the moment, but we will take another 100-120 kilos over the winter. Nice ! You already have plastic Windows and some light body panels, where do you think you can get 100/120kg less. ? Edited by Cayman48 on Saturday 14th June 15:57

We haven't put lighter panels or removed the glass yet. Wanted the electric windows for this year as it is still road registered. Panels and glass will be done over the winter, as well as lightweight loom.

Any updates to this build? I'm very interested to see what people are doing with this car to get weight out and keep street legal. I built a 900 kg 986 Boxster race car several years ago but working on a street legal Cayman S now. I'd love to get car to 1100 kg and keep all road going equipment. i have my 987.2 Cayman S down to 1300 kg so far.

We took another 100 kilos out of the car over the winter, giving us 1130 less driver. Not sure how you would get to that weight and keep all road going parts!! May be possible with new leightweight rear quarters, and roof. But everything is quite heavy on these cars. s

Curious how did you do door panels? Do you have any photos of them? I wanted to do Rs style door panels Edited by grantsfo on Thursday 7th July 18:01

Thanks for the update! Looks great! One thing I did with 986 Boxster was to bead blast tub and remove all seam sealer . Amazingly enough there was about 20 kg of undercoat and sealer.removed in that process. Haven't looked closely on Cayman to see if it has similar potential. I have made fairly big impact this week on weight. Replaced stock suspension with JRZ coilovers, replaced stock flywheel with Lightweight Flywheel, replaced stock seats with Recaro SPG Profi , installed fab speed headers,and lightweight muffler, removed all stock induction and replaced with fab speed intake, IPD plenum and gt3 throttle body, lightweight Enkei NT03 wheels, Momo steering wheel, lightweight odyssey pc 925 battery, removed all interior behind seats including headliner, fiberglass hatch with lexan window. Pulled unused wiring out of rear of car., removed OEM bumper bars and replaced with small chromoly bars, removed all rear heat shielding , Don't have updated weight yet. Next will be AC delete , gt3 electric power steering, radio delete, I do have fiberglass doors and headlight covers I can bolt on for hillclimbs, I'm looking at bigger motor or forced induction as this is a Hillclimb car too. I run Hillclimb series in California and Oregon in the US. Edited by grantsfo on Thursday 7th July 18:03 Edited by grantsfo on Thursday 7th July 18:08

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grantsfo said: Curious how did you do door panels? Do you have any photos of them? I wanted to do Rs style door panels Edited by grantsfo on Thursday 7th July 18:01 I have aluminium doors, and made 1.00mm thick door cards and then had them flocked. Inner door handles off a 1980's VW Bus!!! The car is away at the race shop as I am not racing it for a month. When it gets back I'll take some photos of the interior.

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OP just keep the S1 Honda. A Cayman is never going to be anything like a Lotus. If you have a good Honda S1 you'll regret letting it go for something a lot heavier. I have a Cayman S daily complete with LSD and PCCBs but it will never go near a track as I have a couple of Lotus cars that are just better suited to the task. With no effort at all you could have a 700kg 350BHP S1 Honda that would destroy just about any Porsche on track. Even an NA S2 Honda is quicker than a Cayman S or R. The Cayman is a truly brilliant all rounder but anyone using one on track that hasnt had a Lotus or similar car should really try it. Best case scenario you are hauling 400kgs round that you simply dont need. Upcoming ring trip.... The Cayman is going because its much better suited to a long road drive and quick scoot up a little private road.

Car won its class at my first Hillclimb event. Edited by grantsfo on Thursday 28th July 11:21

Congratulations. They really are great cars. I have run my standard Cayman R in a road class at a sprint and it beat two GT3's to win its class.

Not entirely relevant - but some useful info here http://www.caranddriver.com/flipbook/porsche-911-g... If you go through the pics it gives the weight savings of removing/changing various bits on a GT3/RS, some of which might apply to Caymans too.

Composite doors dropped significant amount of weight. Car is at about 1175 kg now. Plans to go to about 1050 kg.

1175kg is an extremely impressive weight. Well done!

anonymous said: [redacted] It does give you an idea how much air cons weigh, how much the infotainments weigh and what a waste of time the silly door pulls are.

How much does paint weigh? Remember Mercedes' silver arrows?

DJMC said: How much does paint weigh? Remember Mercedes' silver arrows? A lot less dry than wet. Most of it evaporates.

ORD said: 1175kg is an extremely impressive weight. Well done! Thanks! I'm shooting for 1050 kg. Car stil has full dash, front carpets, AC, heater stereo, steel hatch, street muffler. Here is my old 900 KG 986.

That is one crazy 986 but fair play to you for doing it. What was the spec of that?

edc said: That is one crazy 986 but fair play to you for doing it. What was the spec of that? It was fairly tame on power. Base 1999 Boxster, 2.5 liter with larger throttle body and headers, 6 speed S transmission, all GT3 suspension and KW coilovers. New owner has put a built 2.7 that makes about 250 HP in the car. Its a national level autocross/Slalom car in US now.

grantsfo said: edc said: That is one crazy 986 but fair play to you for doing it. What was the spec of that? It was fairly tame on power. Base 1999 Boxster, 2.5 liter with larger throttle body and headers, 6 speed S transmission, all GT3 suspension and KW coilovers. New owner has put a built 2.7 that makes about 250 HP in the car. Its a national level autocross/Slalom car in US now. Nice. It sounds ripe for a lower final drive too.

edc said: Nice. It sounds ripe for a lower final drive too. Short 23 inch race slicks helped with that!

westwood35 said: I have aluminium doors, and made 1.00mm thick door cards and then had them flocked. Inner door handles off a 1980's VW Bus!!! The car is away at the race shop as I am not racing it for a month. When it gets back I'll take some photos of the interior. Sorry, been very busy and forgot about your request!

Thanks! Those look great! I went to composite doors so bypassing RS style door panels now. I'm to 1135 KG now. I still have full dash, AC , Heat, Stereo, carpets, even have cup holders. I'm going to try to hit 1000 kg. That should give lotus guys fits.

Down to 1105 kg now. lightweight pulleys and dash deconstructed now.

grantsfo said: Down to 1105 kg now. lightweight pulleys and dash deconstructed now. Pretty impressive - but does show however what an achievement the Alpine A110 is to be even a bit lighter fully fueled.

If I go to smaller wheels and tires than 18x11 with 335/30/18 DOT R in favor of 16x10 with slicks and go for CF roof, fenders and rear quarters I'd get this car to 1000 kg no problem. For steel chassis car the cayman is very efficient once you get all crap off the car With 350 HP 3.4 liter 6 cylinder my car is becoming very quick!

grantsfo said: If I go to smaller wheels and tires than 18x11 with 335/30/18 DOT R in favor of 16x10 with slicks and go for CF roof, fenders and rear quarters I'd get this car to 1000 kg no problem. For steel chassis car the cayman is very efficient once you get all crap off the car With 350 HP 3.4 liter 6 cylinder my car is becoming very quick! Yes but you are lumbered with all the stiffening (in the wrong places) needed for the Boxster, which probably costs 50-75kg (maybe more) - or have you managed to cut some of that out?

anonymous said: [redacted] Do you know he has taken it out then? Difficult - particularly making the windscreen pillars thinner.

anonymous said: [redacted] I suggest you take an empty cardboard box (of say chocolates), hold it at each end and twist. Try it with the lid open and then closed. You will find it is vastly stiffer in torsion with the lid closed. That is why closed cars are almost always stiffer or lighter (and often both) than their open counterparts. In the case of the 981 the Cayman is (needlessly)over twice as stiff torsionally as the (adequately stiff) Boxster - and inevitably heavier than it need be. It's why when you take a saloon (almost invariably designed as a closed box) and make a convertible out of it a lot of extra weight (50-150kg typically) is added to make it stiffer - but it's rare that even then it comes close to the stiffness of the saloon. A few examples coupe vs convertible BMW 2 series 1415 vs 1570kg BMW 6 series 1825 vs 1895kg C Class MB 1605 vs 1735kg You won't find the reverse - except when a metal hardtop is added to a car designed as a roadster. Porsche could have chosen to make the Cayman lighter than the Boxster - but, presumably for development cost reasons chose not to. You acknowledge in a previous post relating to the Alpine that you don't know why the Cayman is so heavy - it's because of the degree of commonality with the Boxster. The fact that the Alpine is designed as a coupe only is a major part of the reason it is 200+kg lighter than a 718 (yes the fact that it's all aluminium obviously helps - but a Cayman is 44% aluminium according Porsche) Just to give you an example - the Alpine would almost certainly have had a closed "transmission" tunnel if it had been designed as an open car - the transmission tunnel, is a major contributor to torsional stiffness in most open car designs. I could go on - but please start with a chocolate box and (I sincerely hope) you will appreciate how important the roof is.

anonymous said: [redacted] As often the case, your example to support your case, nobbles it! You omitted to notice the VAST (much criticised) sills - you can create stiffness with vast (wide) sills (and keep overall width in check) a big transmission tunnel or a modicum of both. Or let torsional stiffness go hang - plenty of examples of that. Did you not notice that the Alpine manages without either a "transmission" tunnel or vast sills? Ask yourself why? Just perhaps, given their clear focus on weight reduction, it's because, for a closed car, it's not the most weight efficient way... Just try the basics with a chocolate box - with or without a central tunnel! Anyone who thinks, all things being equal, an open car can be as stiff and light as a closed one (or that a rear engined car naturally understeers) really doesn't understand the basics. Edited by bcr5784 on Friday 24th March 19:33 Edited by bcr5784 on Friday 24th March 19:37 Edited by bcr5784 on Friday 24th March 19:48 Edited by bcr5784 on Friday 24th March 19:53

bcr5784 said: Yes but you are lumbered with all the stiffening (in the wrong places) needed for the Boxster, which probably costs 50-75kg (maybe more) - or have you managed to cut some of that out? Having torn apart both Boxster and Cayman making both lightweight racers , the Cayman is worlds stiffer . I had to weld in full cage with door sill reinforcements into Boxster to stop front end from twisting so much. Weight in Cayman comes from roof structure as opposed to Boxster that can loose its top and wind screen However the Cayman chassis is still quite well engineered . I will be carving more weight out. I think people will be surprised at how low I can go with this car. To give you a sense I built lightweight Nissan 370z and literally made semitube frame with aluminum floors , CF roof, doors, fenders, rear quarters , hatch, front hood and the Nissan still weighed 150 kg more than my Cayman weighs now. The 370z was a 400 hp beast but is still a bit hefty more like Porsche GT3 weight. Check out my old lightweight 370z with new owner chasing a GT3 cup car. https://youtu.be/eRILfG2IsQ8

grantsfo said: Having torn apart both Boxster and Cayman making both lightweight racers , the Cayman is worlds stiffer . https://youtu.be/eRILfG2IsQ8 I know - 40500 vs 17000NM/degree (981). Thats the point I'm making. Either the Cayman is stiffer than it needs to be (and heavier as a result) or the Boxster needs to be stiffer (and therefore heavier). Both can't be true. Actually the Boxster is unusually stiff for an open car and (on the road) suffers none of the scuttle shake or shudders of (say) an MX5 or 911Cab so my conclusion is that the Cayman is needlessly stiff. It's as heavy as it is because it shares the same floorpan as the Boxster - and you would design it differently if it didn't have an open sibling, as Alpine have done. It would be interesting to know what torsional stiffness they have achieved. http://blogs.youwheel.com/2014/04/25/car-body-tors... has a fairly comprehensive list of torsional stiffness. The Cayman would come almost on the top. Coupes are generally about twice as stiff as their roadster siblings - and it's interesting how much difference folding rear seats make! Edited by bcr5784 on Saturday 25th March 08:21 Edited by bcr5784 on Saturday 25th March 09:14

grantsfo said: Thanks! I'm shooting for 1050 kg. Car stil has full dash, front carpets, AC, heater stereo, steel hatch, street muffler. Here is my old 900 KG 986. Is that the one that ran on 15" teledials? I'd love to see a side on photo of it if you have one!

Well not street legal anymore but have made much progress. Down to 1030 kg and grew a wing and got fatter.

Edited by grantsfo on Sunday 9th July 01:53

awesome. It's rubbish that a car can be overly stiff stock without a full roll cage. Even a cayman can do with additional stiffening. ergo the Gt4 with half cage instead of a simple harness bar. any inside shots?

I must say that I've really enjoyed following this thread. I am surprised how heavy the basic shell of the Cayman is though. After all the stripping and it's still over 1,000 kg. I guess the 987 hadn't started on the route of more advanced materials like the 981, and now 982. Keep up the good work James.

Edited by grantsfo on Sunday 9th July 16:46

finestjammy said: I must say that I've really enjoyed following this thread. I am surprised how heavy the basic shell of the Cayman is though. After all the stripping and it's still over 1,000 kg. I guess the 987 hadn't started on the route of more advanced materials like the 981, and now 982. Keep up the good work James. 981 and now 718 haven't really moved away from similar steel chassis. They use aluminum doors and hood . Those were and option in 987 cars with R model. Porsche has stuck with fairly conventional steel in Its cayman and boxsters. For a modern steel chassis 6 cylinder car I find them to be fairly light weight. I'm not nearly finished and suspect I ll have car in 950 kg range eventually . Heck my old bare bones 914/6 weighed same and was much smaller. And 914 was a flexy flyer Thing that amazes me is that Porsche can bolt on so much heavy crap on a car that is fairly light . It was as if good engineers designed chassis and then allowed marketing to bolt a bunch of heavy stuff onto platform.with no regard to how it weighed.

just for my curiosity, can you please name the items you have found to be the biggest and heaviest items you removed in that order? tx

I'd be interested in how it's now so light. Mine is at 1130kgs, and there's bugger all left in the car!!!

Should consider a 5 speed box, stronger, good final drive ratio and at least 50lbs/22.5Kg lighter

In approximate order Replacing steel doors with composite doors Ceramic brake rotors OEM power seats to race composite seats Front and rear bumper bar removal OEM wheels/tires to lightweight race wheels/tires Rear hatch from OEM to composite Removal of interior - seats backward Lightweight battery AC delete OEM exhaust to headers and lightweight mufflers Lightweight flywheel Airbag delete Edited by grantsfo on Wednesday 12th July 11:48

ajondyh said: Should consider a 5 speed box, stronger, good final drive ratio and at least 50lbs/22.5Kg lighter Interesting. My experience with 5 speeds in past was that they were weaker than 6 speeds I broke a 5 speed and know of others who broke them as well.. No issues with 6 speed. What data do you have that indicates stronger ? Might be an option.

grantsfo said: Interesting. My experience with 5 speeds in past was that they were weaker than 6 speeds I broke a 5 speed and know of others who broke them as well.. No issues with 6 speed. What data do you have that indicates stronger ? Might be an option. Hmmm, generally in motorsport I have found the consensus is the 6 speed is weak. The place fitting mine now (EMC) also endorses the 5 speed over the 6 speed. I have broken a few 6 speeds myself. Also you can easily get a much better diff for the 5 speed without having to break the bank shipping a very expensive one from USA.

grantsfo said: In approximate order Replacing steel doors with composite doors Ceramic brake rotors OEM power seats to race composite seats Front and rear bumper bar removal OEM wheels/tires to lightweight race wheels/tires Rear hatch from OEM to composite Removal of interior - seats backward Lightweight battery AC delete OEM exhaust to headers and lightweight mufflers Lightweight flywheel Airbag delete Edited by grantsfo on Wednesday 12th July 11:48 tx. so the replacement of steel doors with carbon ones loses the most weight but I suppose must be done in conjunction with a full cage?

That would be sensible. Different pork but I weighed pretty much everything when building my 944 S2 race car, the original spec complete 944 doors are 27Kg each, to put that into context 2 doors weighs about the same as a 944 transaxle gearbox. Stock electric leather seats about the same. Its interesting looking at the latest Pork the same trends seem to hold true which frankly I find amazing (stock S2 around 1340 Kg, my race car 1120 Kg), one would have expected they would have found a way to make a lot of the stuff like seats much lighter over the years but alas no it seems.

Electric seats are boat anchors. Doors are so heavy I can barely lift them by myself. Hatch weighs a ton too. Insulation over engine cover is ridiculous. Again all things done to make car feel upscale as opposed to performance enhancing . Yes for track car door bars required but I'm not currently tracking car . All autocrsses on flatt smooth surfaces at reasonable speeds . So rear cage works for me now.

Lexan windshield ordered.

Ok guys. I broke 1000 kg barrier and made car wider and added aero. 975 kg now! I'm thinking Cayman is actually pretty light given it is a steel chassis. New target 900 kg.

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Mega. Have you got a listing of the part weights by any chance? Keep up the good work, it is genuinely interesting that the scope for weight reduction on the Cayman is so big.

NJH said: Mega. Have you got a listing of the part weights by any chance? Keep up the good work, it is genuinely interesting that the scope for weight reduction on the Cayman is so big. I wish I were that organized! I pretty much just pull things off and either chuck them or sell them on ebay. There are hundreds of items to weigh. When you tear into these cars its mind boggling how many things they bolt onto these cars and how heavy some things are. For example weather stripping is very heavy. I only left strips so doors wont rattle. Next bits: Stock dash weighs a lot too. Im moving to composite dash. Pulling heavy OEM adjustable steering column out and putting in lightweight unit, eliminating power steering pump and pulley in favor of elective pump in front trunk, removing engine compartment fan , replacing OEM radiator fans with lightweight fans. Titanium lug studs, putting even lighter suspension in the car now. 900 kg Cayman S track and hill climber is possible. And that's with heavier 6 speed trans and drive train. Base model with 5 speed likely could go to 875kg.

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What happened to this car?

I'd like to think it became so light that it eventually floated away!

Late to this thread, what an inspiration. I love the 987 Cayman platform but it really does feel overly heavy for the size of the car. I currently have a rear cage and primary usage is Nurburgring so door strength is very much required. Do you have to get a custom cage for a proper job? I'm considering the ability to return to stock - Heigo do a bolt in cage, but nothing that goes through the bulkhead and welds to the front struts, very much permanent) I'm currently 1350kg so miles to go yet. If I could get to 1200kg whilst retaining everything to be road legal that would be OK I think.

Bad Biddy said: Late to this thread, what an inspiration. I love the 987 Cayman platform but it really does feel overly heavy for the size of the car. I currently have a rear cage and primary usage is Nurburgring so door strength is very much required. Do you have to get a custom cage for a proper job? I'm considering the ability to return to stock - Heigo do a bolt in cage, but nothing that goes through the bulkhead and welds to the front struts, very much permanent) I'm currently 1350kg so miles to go yet. If I could get to 1200kg whilst retaining everything to be road legal that would be OK I think. Road legal, or road-going ? 997 Aluminium doors Lightweight 18” wheels Lightweight seats, side mounts and floor adaptor plates Lightweight battery Lightweight exhaust Lightweight CF tailgate Remove AC Remove radio etc Remove tailgate load area carpet and sound deadening Remove froot trims, carpet etc Fit single mass flywheel I reckon that lot adds up to 100kg, and maybe closer to 120kg, depending on how lightweight you go on seats, battery, wheels, exhaust and flywheel. The only issue is, the car’s not the only thing that’ll be lighter, your wallet will be positively featherweight.

Quite a thread resurrection. I also have an SV modified 3.7 engined former hillclimb car. Supposed to be 1200kg, but have not weighed it. Most of the weight saving seems to be from composite panel use on front and rear hatches, and the seats. After a bolt in roll cage from SW in the NW, the trim and dash were put back in place, I guess there could be some weight savings to be made there, but without the sound deadening and carpets in place the car is incredibly noisy inside.

Slippydiff said: Road legal, or road-going ? 997 Aluminium doors Lightweight 18” wheels Lightweight seats, side mounts and floor adaptor plates Lightweight battery Lightweight exhaust Lightweight CF tailgate Remove AC Remove radio etc Remove tailgate load area carpet and sound deadening Remove froot trims, carpet etc Fit single mass flywheel I reckon that lot adds up to 100kg, and maybe closer to 120kg, depending on how lightweight you go on seats, battery, wheels, exhaust and flywheel. The only issue is, the car’s not the only thing that’ll be lighter, your wallet will be positively featherweight. Hi Slippy Already have some of that (seats/battery/wheels/exhaust) I'm looking for ANOTHER 100kg which I think might be a stretch given I'm not willing to remove crash bars etc. Will post back with progress later this year.

super cool thread but as said before, the platform doesn't seem that great to get ultra low weights even with huge effort

Like what? Last time my Cayman was on the scales it was 1350, it is very fast at that weight - and I can only imagine how agile it would be at 1250