big_wasa
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| posted on 10/3/06 at 10:08 PM |
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Progress .... So alloy or steel floor ?
Haven’t done anything this week or last due to work 
Chassis is nearly done.
Things to do: Top harness mounts
Tank Mounts
Steering column mount
pan hard rod mount
rad mount
And I guess as is the locost way lots more 
Question. What is best for the floor, alloy 2mm or 1.6mm steel? And do I need to reinforce the area where the seats mount and the area you step on
when getting in and out?
 
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Deckman001
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| posted on 10/3/06 at 10:11 PM |
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Ally floor keeps the weight down, you will need to re-enforce the area where the seat will mount though, a couple of med sized strips across the
bottom normally does 
Jason
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nitram38
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| posted on 10/3/06 at 10:12 PM |
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Nice Chassis. I like the roll over bars.
My personal preference for panels is aluminium.
[Edited on 10/3/06 by nitram38]
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zilspeed
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| posted on 10/3/06 at 10:16 PM |
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My own preference is for an ally floor, but I know someone who will give me some glavanised steel sheet (nice and thin, honest) for nowt - so
I'll be using steel 
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flak monkey
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| posted on 10/3/06 at 10:16 PM |
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Ali floor's considerably lighter than a steel one. Just rivet and bond it (with PU adhesive) on.
As Jason says, you will need a couple of strengthening strips of steel across where the seats mount. The rest will be fine though.
David
Sera
http://www.motosera.com
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big_wasa
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| posted on 10/3/06 at 10:21 PM |
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Roll bar is the only part that I havnt made. Its an MK X bar.
Pleased with the chassis on the whole. Would do a few things differant.
Sick of cutting/welding but already thinking about the next one and how I can make it better.
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graememk
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| posted on 10/3/06 at 10:23 PM |
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are you going to powder coat it ?
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big_wasa
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| posted on 10/3/06 at 10:28 PM |
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Nope going to paint this one.
Cant Keep up with your avatars Graeme Hows your build going m8
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big_wasa
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| posted on 10/3/06 at 10:31 PM |
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pic
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BKLOCO
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| posted on 10/3/06 at 10:33 PM |
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If you have any intention of ever racing it you'll need to fit a steel floor.
Ally is not allowed by 750 club rules.
Just thought I'd mention it.
Experience is what you get when you don't get what you want!!! 
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graememk
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| posted on 10/3/06 at 10:41 PM |
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hi wasa, all built and nearly finished. . electrics and plumbing all in but having ecu probs. . . hopefully will sort out for sunday.
your welcome to have a look i'm building in low fulney in my uncles garage (bigger than mine) just up the road from you. theres a westie live
axel there to if you need to have a look at anything in real life.
[Edited on 10/3/06 by graememk]
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big_wasa
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| posted on 10/3/06 at 10:43 PM |
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cool would like that ,,,,
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MikeR
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| posted on 10/3/06 at 10:45 PM |
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Steel floor has more penetration protection than ali - ever seen a brick / rock / branch on the road??????
Steel is easier to attach and is less likey to detatch (i have heard stories from some westfield owners whos floors have come away after years of use
(but they didn't glue them as well). Steel floor does become more structural and doesn't need re-inforcing.
I worked out 1.2mm steel is about as heavy as 2mm or 2.5mm ali, easier to attach, cheaper, and, oh sod the justification, its what i went for and i
used the sheet for other things like footwell bulkhead etc.
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JoelP
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| posted on 10/3/06 at 10:49 PM |
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if 1.5mm ally turned out to be over 10kgs lighter than 1.5mm steel, id probably be tempted myself.
only for a bec racer though
[Edited on 10/3/06 by JoelP]
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big_wasa
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| posted on 10/3/06 at 10:53 PM |
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Cheers bkloco But a track day is the most it will see.
Its going to replace my bikes as a fast sunday afternoon blaster. Had to get rid of bike due to pier pressure. I would always have it flatout on a run
(Rf900)
Already planning a Bec.
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flak monkey
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| posted on 10/3/06 at 11:31 PM |
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Ali is 3 times lighter than steel. IIRC when I did some CAD modelling a 2mm ali floor was 6 or 7 kg lighter than a 1.6mm steel floor.
David
Sera
http://www.motosera.com
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DIY Si
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| posted on 10/3/06 at 11:33 PM |
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Have to agree with the penetration protection thing. You see too much crap on the roads to risk it burrowing through the floor at speed. If it gets
anywhere near you, you're toast. Even if it doesn't hit you, you'll probably cack yourself so hard it might hurt anyway!
Note to self, must type faster. Also, ally is generally 3 times lighter than the same size steel panel, but is roughly half the strength.
[Edited on 10/3/06 by DIY Si]
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MikeR
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| posted on 10/3/06 at 11:50 PM |
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i did a spreadsheet of comparisons, i'll see if i can find it and post it up. Note i'm not an engineer so there are probably mistakes -
but please keep the mentioning them down to a whisper .... remember this was my justification to myself (plus how easy it would be to fit (weld)
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DIY Si
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| posted on 10/3/06 at 11:51 PM |
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Don't worry, I'm welding in the roof of my donor as part of my floor. Probably. Depends how much a nice big sheet of 16 swg is.
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MikeR
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| posted on 10/3/06 at 11:57 PM |
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here you go, steel vs ali spreadsheet.
my choice was 1.2mm steel as i felt it was better than 3mm ali (second choice)
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stevebubs
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| posted on 11/3/06 at 12:44 AM |
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FWIW, My Sylva Fury has a steel floor welded where the seat goes, a brace across infront of this and then an Ali floor bewteen this and the front of
the cockpit.
Think the later Fisher chassis do away with the steel plates and just use ali.
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cossey
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| posted on 11/3/06 at 09:10 AM |
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if you hit anything that will go through an ali floor of the thicknesses generally used then it is very likely that it will go through a steel floor.
something penertrating the floor is effectively localised bending which the extra thickness of the ali will help reduce. also the work hardening of
the ali should mean that although the floor is damaged and needs replacing the object wont actually go through it. (with either floor if it is a large
enough object to possibly go through the floor its going to be a brown trouser moment.
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MikeRJ
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| posted on 11/3/06 at 02:41 PM |
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I would go for a steel floor purely because it can be welded in place rather than pop riveted. Riveting the side panels is fine, but the floor has
to support the weight of your legs and the rivets are in a bad location wrt corrosion, especialy if your 7 has to live outside.
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badding
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| posted on 13/3/06 at 09:49 PM |
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HI
I want to use a carbonfloorpanels, made from 2 layers CF with 2 layers glasfiber in between...
Looks nice and weights practically nothing and much stronger than ally ay 2 mm thickness
[Edited on 13/3/06 by badding]
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britishtrident
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| posted on 14/3/06 at 08:46 AM |
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With this type of application CF is best a thin layer of glass fibres on exposed side to ressist penetration --- unlike kevlar cf isn't good
with point impacts. Putting a thin layer of glass or kevlar on makes a big difference.
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