Miura Posted September 7, 2006 Share Posted September 7, 2006 It appears to me that the single diagonal Arch FIA Bar is much more popular than the double diagonal Caged FIA Bar Is there any real reason for this? is one better than the other? Is the single diagonal still available new (I know I can phone CC but somebody here will know Link to comment Share on other sites More sharing options...
stephen grant Posted September 7, 2006 Share Posted September 7, 2006 I thought that the single had simply been replaced by the double about 18 months ago? stephen Link to comment Share on other sites More sharing options...
rgrigsby Posted September 7, 2006 Share Posted September 7, 2006 I think it's simply timing, the single "Arch" bar has been around for years, the double "Caged" bar is a recent introduction. Rob G www.SpeedySeven.com Link to comment Share on other sites More sharing options...
Miura Posted September 7, 2006 Author Share Posted September 7, 2006 Seems to make sense guys anyone has any views on the design itself? the rear-view? in a word which of the 2 designs is best? Link to comment Share on other sites More sharing options...
Tom_C Posted September 7, 2006 Share Posted September 7, 2006 I think the double diagonal is lighter, and fixing the head restraint pad is easier. Cheers Tom FH54WLX - only the car supports ManU, honest! see here - UPDATED Link to comment Share on other sites More sharing options...
rgrigsby Posted September 7, 2006 Share Posted September 7, 2006 The Caged one is lighter? really? hmm strange... Rob G www.SpeedySeven.com Link to comment Share on other sites More sharing options...
Leadership Team SLR No.77 Posted September 7, 2006 Leadership Team Share Posted September 7, 2006 The Caged version is noticeably narrower across the top than the original Arch FIA bar. I'll let everyone else judge the merits of the top width in a roll-over situation 😳 Stu. Link to comment Share on other sites More sharing options...
NevDyson Posted September 7, 2006 Share Posted September 7, 2006 CC are still stocking the Arch FIA, I picked up one for my XFLOW yesterday after waiting since may for them to get them in. Personally I think CC were expecting to get CAGED ones in but have now reversed their decision for 'older' cars. Must say not sure why they insist on selling the FIA with the petty strut, not all of us need that as well, it just seems a way of inreasing the costs. Surely it would be better to sell that as a seperate item ???? Get In , Sit Down, Shut Up, Hang On. :-) Working next door to Caterham Cars is getting expensive ......... Link to comment Share on other sites More sharing options...
Tom_C Posted September 7, 2006 Share Posted September 7, 2006 You get the Petty Strut as you're buying an FIA bar, and it's only FIA approved with the strut. AIUI, the original FIA bar is made to the min tube sizes in the MSA blue book, but a bar can also comply by design and test methods, which I think is how the Caged ones are lighter. I was told that my Caged Roadsports cage weighs no more than the old FIA bar, but is significantly stronger. Cheers Tom FH54WLX - only the car supports ManU, honest! see here - UPDATED Link to comment Share on other sites More sharing options...
nickh7 Posted September 8, 2006 Share Posted September 8, 2006 The Fia without the strut is liable to fold so i am told by an ex race mechanic, if your doing a track day fit it. Nick h Its Yellow and Black and makes me 😬 Link to comment Share on other sites More sharing options...
Gambo Posted September 8, 2006 Share Posted September 8, 2006 In all honesty it'll probably fold with the petty strut attatched. RED 2.0 HPC 230BHP Link to comment Share on other sites More sharing options...
stevefoster Posted September 8, 2006 Share Posted September 8, 2006 There have been cases of rolls with the strut and without the strut, the bar had done it's job. There have even been cases of rolls with the non FIA bar's and it did the job. It all depends on the type of impact / loads put on the equipment. The cage is def. a good idea see here Caterham racing incident, high res 21Mb near the top. Low res further down. Hants (north) / Berkshire club here Area meeting pics here My Racing here Edited by - stevefoster on 8 Sep 2006 12:12:45 Link to comment Share on other sites More sharing options...
Graham Perry Posted September 8, 2006 Share Posted September 8, 2006 Eeeek ❗ Link to comment Share on other sites More sharing options...
McBreadhead Posted September 8, 2006 Share Posted September 8, 2006 Another big benefit of the twin diagonal new style bar is you can retain your standard boot cover as the tubing diameter is small enough (just) to use the same fabric cut outs. I know as I've just had one fitted and saved a good few bob. So Miura did you get your radiator/nose cone sorted? Link to comment Share on other sites More sharing options...
Unclefester Posted September 8, 2006 Share Posted September 8, 2006 McBreadhead, So what is the diameter of the Caged main and sub tubes? I understand FIA demands either 45mm dia 2mm wall thickness or 50mm dia 1.5mm wall for the main tubes. Given the same length the 50mm tube is lighter. I'm interested in this as it does sound a bit odd the Caged bar being lighter as it's got more tube length, although I suppose being narrower at the top shortened the main tube somewhat. I was thinking of adding a diagonal (or 2) to my SV Caterham bar........ Be interesting if someone would actually WEIGH the things of course.... BY the way, my PTP 210bhp K 1800 motor weighs 75kg, I know this as I weighed it on the bathroom scales the other day. Without flywheel and alternator, leads and water rail admittedly. By comparison, my Davrian Imp race 1040cc motor weighs 60 kg all in, with carbs, clutch, exhaust, silencer,& airfilters, though it does only make about 120bhp. The race 5 speed box (LSD, straight cut CR Jack Knight) is 30kg. The car handles very well when it keeps its rear tyres oil free. 😬 Blackout!!! 😬 😬here *eek* Edited by - Unclefester on 8 Sep 2006 20:40:18 Link to comment Share on other sites More sharing options...
Tom_C Posted September 8, 2006 Share Posted September 8, 2006 Uncle, those FIA sizes don't applt if it proved to comply in some other way. I haven't stuck calipers on my cage, but I guess the tubes are < 40mm dia. Cheers Tom FH54WLX - only the car supports ManU, honest! see here - UPDATED Link to comment Share on other sites More sharing options...
Unclefester Posted September 8, 2006 Share Posted September 8, 2006 Are they really that small? I saw the Caged bar on Delberts car, and I thought it was the same as on my standard type which is 45mm, but I may well have been mistaken. It would be interesting to draw up a list of weights on these though..... Blackout!!! 😬 😬here *eek* Link to comment Share on other sites More sharing options...
Site Manager Posted September 8, 2006 Share Posted September 8, 2006 When you have the weights, could you add them to this weights page? Link to comment Share on other sites More sharing options...
ewenm Posted September 8, 2006 Share Posted September 8, 2006 I was warned when I switched to an aeroscreen that the central mirror would be useless as the view is blocked by the FIA bar. I've got the new Caged double-diagonal one and it turns out that the view through the central mirror (Racetech sourced with aeroscreen from RIF) is perfect just below the crossing point. I don;t know if this is because the diagonals are narrower or slightly higher than the Arch version, but it's good for me :) Project BUMBLEBEE lives on! Link to comment Share on other sites More sharing options...
rgrigsby Posted September 9, 2006 Share Posted September 9, 2006 It does depend on the hieght of your central mirror, Chris at the 7's workshop modified mine so it works perfectly with an Arch bar 😬 Rob G www.SpeedySeven.com Link to comment Share on other sites More sharing options...
Unclefester Posted September 9, 2006 Share Posted September 9, 2006 Hello Site manager....As I've just removed my standard CC rollbar on the SV I thought I'd weigh it. 4.2kg ...but I don't know how to add it to the weights page. Seems very light, but I've no way of checking the wall thickness of the main 45mm diameter tube. Should be 2mm to be up to FIA standards assuming I weld a diagonal in. Couldn't find any "add new items" button! Blackout!!! 😬 😬here *eek* Edited by - Unclefester on 9 Sep 2006 21:40:48 Link to comment Share on other sites More sharing options...
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