tiddy1 Posted January 17, 2005 Share Posted January 17, 2005 I was considering fitting a lowered floor but am wondering how much torsional stiffness is lost by removing the flat stressed sheet and replacing it with a tub which will be no use in stopping the chassis from twisting any thoughts? Link to comment Share on other sites More sharing options...
V7 SLR Posted January 17, 2005 Share Posted January 17, 2005 I had exactly the same thoughts. Although it's not a "stressed" panel as such, it does use a sealant before the rivets are popped therefore it offers a lot of triangulation. I'd prefer to find an alternative for that reason AND because having my sensitive parts that much lower to the stuff I normally drive over seems a shade too "daredevil" for me. Link to comment Share on other sites More sharing options...
Myles Posted January 17, 2005 Share Posted January 17, 2005 any thoughts? Several... It's even worse for me (see recent threads) because fitting a lowered floor will (almost certainly) require me to remove a 'minor' chassis diagonal from my race-chassis. I'm also not entirely convinced by the statement that you no longer need the honeycomb insert due to the lowered floor being stronger (heavier gauge?) than the standard one... I dunno. Maybe I should get a tall-bar instead - the hood issues aren't for me - IYSWIM Project Scope-Creep is underway... Alcester Racing 7's Equipe - 🙆🏻™ Alcester-Racing-Sevens.com Link to comment Share on other sites More sharing options...
Tony C Posted January 17, 2005 Share Posted January 17, 2005 Having seen some lowered floor "Tubs" while I was at Arch, I am fairly certain that no overall stiffness will be lost - it's quite a robust looking piece of kit BRG Brooklands SV 😬 It seems that perfection is achieved not when there is nothing more to add, but when there is nothing more to take away. (Antoine de Saint-Exupery) Link to comment Share on other sites More sharing options...
Normans_Ghost Posted January 17, 2005 Share Posted January 17, 2005 As you may know I've replaced all interior panels including floor with RiF's excellent carbon panels. After a year of hard road use in the North there is no sign of rivet strain etc so I conclude (good word) that these panels are not put under stress. Norman Verona, 1989 BDR 220bhp, Mem No 2166, the full story here Link to comment Share on other sites More sharing options...
Myles Posted January 17, 2005 Share Posted January 17, 2005 Floor Run this past us once again... So how is your seat affixed ekt., ekt. Project Scope-Creep is underway... Alcester Racing 7's Equipe - 🙆🏻™ Alcester-Racing-Sevens.com Link to comment Share on other sites More sharing options...
Chris__ Posted January 17, 2005 Share Posted January 17, 2005 Carbon floor. Blimey. Link to comment Share on other sites More sharing options...
Joe 90 Posted January 17, 2005 Share Posted January 17, 2005 IMHO the loss of chassis stiffness will be negligible. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 21 Sept Link to comment Share on other sites More sharing options...
tiddy1 Posted January 17, 2005 Author Share Posted January 17, 2005 Interesting so is the "tub" considerably thicker Aluminium, I was going to use 1mm thick Aly and fabricate it myself. Link to comment Share on other sites More sharing options...
Trevor Newman Posted January 18, 2005 Share Posted January 18, 2005 i seem to remember my lowered floor was twice as thick as the passenger side Link to comment Share on other sites More sharing options...
Jason Plato Posted January 18, 2005 Share Posted January 18, 2005 The tub uses thicker ally of a different composition . Cant recall what type of ally it is ...... Link to comment Share on other sites More sharing options...
Rob Walker Posted January 18, 2005 Share Posted January 18, 2005 Tiddy, The new car I am currently building has the lowered floor. Lovely job IMO it is made from NS4 Ali and would guess its 2mm thick it is also runs the complete floor pan of the car tapering all the way from the peddle box bulkhead to the rear bulkhead behind the seats so no crossbracing is affected. I would not advise you to use 1mm ali for obvious reasons. Link to comment Share on other sites More sharing options...
Myles Posted January 18, 2005 Share Posted January 18, 2005 Hang-on... My understanding of the lowered floor was that it tapers from the pedal-box bulkhead down to the cross-brace underneath the drivers knees - it is then horizontal under the seat area - i.e. constant depth... Looks like this from the photos I've seen (curse CC for not having an Autosport stand) and this has been confirmed by an SV owner I know. Can you double-check.confirm, Rob - this is critical to my plans Project Scope-Creep is underway... Alcester Racing 7's Equipe - 🙆🏻™ Alcester-Racing-Sevens.com Link to comment Share on other sites More sharing options...
mav Posted January 18, 2005 Share Posted January 18, 2005 Myles you are correct... Link to comment Share on other sites More sharing options...
Jason Plato Posted January 18, 2005 Share Posted January 18, 2005 is it the same design of lowered floor with the taper for SV & std chassis ? Link to comment Share on other sites More sharing options...
Myles Posted January 18, 2005 Share Posted January 18, 2005 Dave - that's what I wanted to check. Broadly speaking (obvious dimensional-differences aside), I believe the answer is yes. Project Scope-Creep is underway... Alcester Racing 7's Equipe - 🙆🏻™ Alcester-Racing-Sevens.com Link to comment Share on other sites More sharing options...
mav Posted January 18, 2005 Share Posted January 18, 2005 Yes, the taper runs from the pedal box to the cross member under your knees, and then is flat across the 'seat pan'. I have a pic of the sv lowered pan somewhere here Link to comment Share on other sites More sharing options...
mav Posted January 18, 2005 Share Posted January 18, 2005 Pics of SV lowered floor pan: here and here Link to comment Share on other sites More sharing options...
Alex Wong1697456877 Posted January 18, 2005 Share Posted January 18, 2005 At 4cm lower, is it possible to ground the floor? My exhaust has taken a bashing from hard cornering and the tow eyes (I have 4 on my car - says alot about my car!) have all met the ground at one stage or other. I like the idea of a lowered floor but wondered if it could come into contact with the ground - not an appealing thought! Link to comment Share on other sites More sharing options...
knowley Posted January 18, 2005 Share Posted January 18, 2005 I hope not Alex! Am having one fitted to my car in March, from what I have read your sump will always be lower than the floor. I have seen one installed on a standard chassis, the bar at the front of the seat runners had over an inch gap to the floor, and looking underneath I could see lots of other bits hanging lower. R300 Register My R300 Edited by - knowley on 18 Jan 2005 12:13:39 Link to comment Share on other sites More sharing options...
Alex Wong1697456877 Posted January 18, 2005 Share Posted January 18, 2005 Is the adjacent A-frame bush higher or lower than the new floor? Link to comment Share on other sites More sharing options...
knowley Posted January 18, 2005 Share Posted January 18, 2005 Whats the A-frame 😳 I need explanations like, "lump of metal, silver in between rear wheels" = diff 😳 😳 😳 R300 Register My R300 Link to comment Share on other sites More sharing options...
Alex Wong1697456877 Posted January 18, 2005 Share Posted January 18, 2005 The A frame is the big A shaped frame that sits under the back of the car. The point of the A is attached to the diff (the big silver lump bolted to the back of the car), infront of the metal silver box (the fuel tank). The other 2 ends are attached to the chassis just in front of the rear wheels. I think the new cars have the A frame bush higher up than my old '97 chassis. My concern is that these have hit the ground before on my car (admittedly only in extreme circumstances), but they are less than 40mm tall, therefore I wondered if the new floor really was lower than these and could hit the ground. The worst place for this is exiting the Karrusell at the ring. Edited by - Alex Wong on 18 Jan 2005 14:19:54 Link to comment Share on other sites More sharing options...
knowley Posted January 18, 2005 Share Posted January 18, 2005 ahhh ok - was looking at a newer chassis and the lowered floor was not lower than bits at the back of the car 😳 I hear this is a very popular upgrade at CC, how come we don't have more pictures floating around? R300 Register My R300 Link to comment Share on other sites More sharing options...
Myles Posted January 18, 2005 Share Posted January 18, 2005 is it possible to ground the floor? I don't think so Alex... I currently run the old-style side-impact bar - this has a 38mm tube running underneath the current floor - right below the chassis member under your knees. As this is closer to the center of the car, I'd expect to grind this as much (if not more) than a lowered floor - and I've only ever had a problem negotiating those lie-flat security bollards used to protect parking spaces... Project Scope-Creep is underway... Alcester Racing 7's Equipe - 🙆🏻™ Alcester-Racing-Sevens.com Link to comment Share on other sites More sharing options...
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