Lauben Posted September 4, 2002 Share Posted September 4, 2002 What is it that makes an R lighter than the Roadsport, exept from the obvious of course The Slippery Road and Welcoming Ditches Society of 1993 Link to comment Share on other sites More sharing options...
scooby dooby doo Posted September 4, 2002 Share Posted September 4, 2002 here we go - with a guess at the weights spare wheel and tyre 12kg spare wheel carrier 2kg hood spreader bars 1kg hood 2kg doors 2x2kg seats 2x3kg carpet (side, floor, boot floor) 3kg screen 10 kg wiper motor 5kg washer bottle 2kg (when full) carbon wings 3 kg carbon nose 2kg wheels 6kg tyres 6kg 67 kg. hmm.. 540 to 470 kg is 70 kg so i can't be far out... R500s have more magnesium as well to save a bit more. HOOPY CYCLE WINGS CUCUMBER Link to comment Share on other sites More sharing options...
Lauben Posted September 4, 2002 Author Share Posted September 4, 2002 Just the info I needed, thanks. The Slippery Road and Welcoming Ditches Society of 1993 Link to comment Share on other sites More sharing options...
stevefoster Posted September 4, 2002 Share Posted September 4, 2002 Screen is 3.9kgs on it's own. S leather seats are 7.7kgs. Tillet carb/kev are 2kgs plus mounting you choose. There's also things like there is no wiper motor bracket welded in. /Steve My racing pics, 7 DIY, race prep. Updated often here Hants (North) and Berkshire area club site here Edited by - stevefoster on 4 Sep 2002 23:06:17 Link to comment Share on other sites More sharing options...
scooby dooby doo Posted September 4, 2002 Share Posted September 4, 2002 so more difference in the seats, less in the screen (does that include the stanchions Steve?). I think the GRP tillet seats are a similar weight to the kevlar ones. The seat runners make a BIG difference. 8kg total for adjustable versus a few hundred grams for the fixed runners. However, an R model will gain weight in the following ways/options (again - the weights are estimates) HEAVIER seat runners - 4x2kg apollo tank - extra 4 litres of oil plus the ali tank itself dry dump - similar gain i guess FIA - its 10 kg vs 2kg for a standard SL cage is only 10 kg, i think the roadsports one is heavier honey comb tank protection kit 1kg master switch - the wodge of extra, high current cable 1kg LIGHTER the big ali race rad vs the non race item 🤔 carbon dash will be a tad lighter i guess... the stack dash is probably a bit lighter than the other dials 6 speed box is lifter than the standard one - any guesses anybody 🤔 wiper motor mount as mentioned already HOOPY CYCLE WINGS CUCUMBER Link to comment Share on other sites More sharing options...
Julian Thompson Posted September 4, 2002 Share Posted September 4, 2002 Dave - you're miles out on the seat runners I reckon. My "R" with kevlar tillets has a pair of alloy rails on the passenger side which weigh a few hundred grams and a pair of steel runners on the drivers side that can't weigh more than a kilo, all in. What sort of runners weigh 8 kilo's? Link to comment Share on other sites More sharing options...
Fred Posted September 4, 2002 Share Posted September 4, 2002 JULIAN had a look at your site found it more helpful than all my phone calls to caterham for information thanks. fred Link to comment Share on other sites More sharing options...
Fred Posted September 4, 2002 Share Posted September 4, 2002 caterham anorexia 😳 fred Link to comment Share on other sites More sharing options...
scooby dooby doo Posted September 4, 2002 Share Posted September 4, 2002 hmm.. maybe i *am* being a bit rude to the runners. but they are stupidly heavy for what they are - 8 kg may be a "tad" excessive as an estimate though. Thats 8kg in total - ie for both seats which is 4 runners which is 8 bits of folded steel. I'm on GRP tillets and ali mounts now. I used to have new style S-type seats on runners but I've sold them all so can't weigh them. I'd be interested to see the reult of them on some scales though... HOOPY CYCLE WINGS CUCUMBER Link to comment Share on other sites More sharing options...
Julian Thompson Posted September 4, 2002 Share Posted September 4, 2002 Fred - thanks very much! OK Dave, you're forgiven!! I am also getting a bit of a "weight phobia" (as I slurp a glass of vino-collapso worth at least 200 calories) and would like to do a better seat mount. I have a pal who is a total genius in the metal shop (he runs a business making model aircraft diesel engines) and I was thinking he might be the answer for a nice set of alloy mounts, superlight stylee! Any ideas on design? Link to comment Share on other sites More sharing options...
scooby dooby doo Posted September 5, 2002 Share Posted September 5, 2002 the superlight mounts are just 20mm (1.5mm wall) box section ali with holes and slots cut as appropriate to clear the holes in the seat/floor and the rivets in the floor. I think they're 30 quid a pair. again - treat all the numbers with a large dose of skepticism HOOPY CYCLE WINGS CUCUMBER Link to comment Share on other sites More sharing options...
stevefoster Posted September 5, 2002 Share Posted September 5, 2002 Yes the screen is inc stanchion. Runners are 1.6 kg a pair. The GRP seat felt about the same weight as the leather one but could be a bit lighter. My Tillet seat mounts are my own untra light construction...fixed position. I have a huge spread sheet with every change or thing I have every had off the car weighed... how sad is that! /Steve My racing pics, 7 DIY, race prep. Updated often here Hants (North) and Berkshire area club site here Link to comment Share on other sites More sharing options...
scooby dooby doo Posted September 5, 2002 Share Posted September 5, 2002 runners are 1.6 kg 🤔 so 3.2kg for two seats worth 🤔 so i save about 3kg going for the ali ones. I've heard the two types of Tillet are very similar in weight with the kevlar ones just being stronger. Not weighed any of them though so it might just be heresay.... HOOPY CYCLE WINGS CUCUMBER Link to comment Share on other sites More sharing options...
Julian Thompson Posted September 5, 2002 Share Posted September 5, 2002 Dave - certainly the weight saving is expensive - but still noticeable. The Kevlar ones need to be tied down with weights to stop them floating off..... 😬 The glass ones are, I would guess. about 3kg per seat heavier. That makes it over £100 per kilo!!!!! (but they do look great, eh?) Link to comment Share on other sites More sharing options...
elie boone Posted September 5, 2002 Share Posted September 5, 2002 Does anybody got the weight for the clam shell & headlight support ? Link to comment Share on other sites More sharing options...
stevefoster Posted September 5, 2002 Share Posted September 5, 2002 New style head lamps weigh in at 3.1kg per pair. That includes the bent metal mouting and the indicator. When I picked up a Carb/Kev Tillet and then a GRP I put the GRP one down and lusted after the Carb/Kev one until I cracked and bought it... The weight difference in you hands is noticeable. Junk the heavy runners of course. I liked the comment about weight and floating away . They would blow away pretty easily to I reckon. /Steve My racing pics, 7 DIY, race prep. Updated often here Hants (North) and Berkshire area club site here Link to comment Share on other sites More sharing options...
scooby dooby doo Posted September 5, 2002 Share Posted September 5, 2002 i prefer the look of the GRP ones - everything in my car has to be red, black or me ❗ 3kg is alot more than i had been led to believe though... someone talking b*ll*cks i guess... HOOPY CYCLE WINGS CUCUMBER Link to comment Share on other sites More sharing options...
Julian Thompson Posted September 5, 2002 Share Posted September 5, 2002 It's just a guess, Dave, not bollocks. I do still think it could be about that though, based on the way they feel. Link to comment Share on other sites More sharing options...
scooby dooby doo Posted September 5, 2002 Share Posted September 5, 2002 sorry - i think you misunderstand me. If you've tried both in your hands and reckon 3 kg then i'm happy to believe it. I'd *heard* (unsubstantiated rumour etc), that the difference was tiny. but it was at least 3rd hand info so I don't trust it very much. certainly not as much as you telling me you've tried it when deciding which to buy. I always did wonder why they bothered selling the kevlar seats if they were no lighter... Can we argue about the weight difference of somehing else now cucumbers perhaps 🤔 😬 HOOPY CYCLE WINGS CUCUMBER Link to comment Share on other sites More sharing options...
Julian Thompson Posted September 5, 2002 Share Posted September 5, 2002 I bet my ass is heavier than yours. I've weighed it with and without curry and I reckon on a 2 kilo saving if I don't eat any naan bread...... ❗ Link to comment Share on other sites More sharing options...
Trevor Phillips Posted September 6, 2002 Share Posted September 6, 2002 Dry sump + pipes on VX is 3.6kg. Adjustable runner 1.68kg If you look at Graeme Finlayson's website there is a detailed database of weights that you can contribute to. I've got about 50 items to schedule and then add. Link to comment Share on other sites More sharing options...
scooby dooby doo Posted September 6, 2002 Share Posted September 6, 2002 how do you weigh your ar5e without waying your belly 🤔 I think the reading for one may be affect the other 😬 HOOPY CYCLE WINGS CUCUMBER Link to comment Share on other sites More sharing options...
stevefoster Posted September 6, 2002 Share Posted September 6, 2002 VX Wet sump / windage plate / gaskets 5.7 4lt oil 3.6 Total 9.3 Caterham dry sump pump (inc connectors) 2.25 QED sump pan (inc connectors) 3.4 Oil tank (inc connectors) 0.7 Pump drive pulley and belt 0.3 5 lts oil 4.5 Dry sump hoses ~2 metres 0.7 total 11.85 Not as big a diff as you might have thought. /Steve My racing pics, 7 DIY, race prep. Updated often here Hants (North) and Berkshire area club site here Edited by - stevefoster on 6 Sep 2002 15:10:18 Link to comment Share on other sites More sharing options...
Ray Pearce Posted September 6, 2002 Share Posted September 6, 2002 How to Weigh your A**e (The Archimedes weigh) 1) Fill a bowl with water 2) Arrange several bathroom scales around bowl 3) Assume a 'spider' position above bowl balanced on scales 4) Take readings from scales and add them up 5) Dunk A**e in water 6) Take further readings As water is approximately the same density as A**e, the difference between the two readings is approximately the A**e weight. Edited by - ray pearce on 6 Sep 2002 15:26:30 Link to comment Share on other sites More sharing options...
Gary G Posted September 6, 2002 Share Posted September 6, 2002 Top Tip: Don't use a washing-up bowl for this exercise. SL No.84 Link to comment Share on other sites More sharing options...
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