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Forum Mod  5933 Posts Member #: 784 9 times Avon Park Class C winner Milton Keynes |
23rd Dec, 2005 at 10:39:16pm
Does anyone know what the weight saving is when you cut out the boot floor and substitute it with either Curley carbon fibre or alloy sheet?
I seriously doubt it! |
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5795 Posts Member #: 80 AFRacing LTD Newbury, Berks |
23rd Dec, 2005 at 11:15:41pm
boot floor is 7kgs...
AlexF |
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Forum Mod 10980 Posts Member #: 17 ***16*** SouthPark, Colorado |
24th Dec, 2005 at 12:24:23am
On 23/12/2005 23:15:41 AlexF2003 said:
boot floor is 7kgs... Alex My arse it is... Or are you still including the battery being sat in the box and the jack in the wheel well - maybe a spare tyre aswell? 
Paul let's apply it with some maths! Just measure the approximate size of it as if it were a rectangle; ie- a little over, a little under, in places (ignore the battery box for the mo). So that's (say 24"x 45") = 1080sq" Now find a small piece of steel approx the same gauge - i'll take a guess at 20's - you'll know better  . Measure the area, then weigh it on the wife's kitchen scales.
Say it measures 12" x 8" then this = 96sq". Now divide the boot floor area by the 'sample piece' area; eg 1080/96 = 11.25. Now times the weight of your sample piece by 11.25. That is the approx weight. Ally is around very close to 1/3 the density of steel. Hence If you replace the whole boot floor with a sheet of ally the same gauge, you'll have saved 2/3 of whatever you calculated above. This is great in theory - but ally this thin has all the rigidity and support of an apple skin... BUT replace the boot floor with a sheet of ally three-times the thickness of the original boot floor, and it'll weigh exactly the same. You have saved on tha battery box 'sides' however - but instead you now have to fabricate a mounting cradle and bracket for the battery - so what have you actually gained? Even a crappy little plastic battery box has a mass... Something else to consider: If you use (say) 20 nuts and bolts to hold this new floor in place, don't forget to add a half-kilo or something for them. And if you use half a tube of sikaflex to bond it into place - don't forget to weigh the sikaflex tube before and after!!! I'm the last person to be advising on weight-loss , but i can apply common sense engineering logic to recognise that the boot floor is a pretty important structural member - ESPECIALLY in a vehicle without a cage to instead rely on to hold everything together...
Edited by turbodave16v on 24th Dec, 2005. On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better Ready to feel Ancient ??? This is 26 years old as of 2022 https://youtu.be/YQQokcoOzeY |
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 9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
24th Dec, 2005 at 09:38:55am
I've cut my boot out and replaced it with nothing.
Fastest 998 mini in the world? 13.05 1/4 mile 106mph
On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination, talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry. |
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 9812 Posts Member #: 332 Resident Cylinder Head Modifier Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem |
24th Dec, 2005 at 10:57:46am
it must be the burgers Dave!
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 6965 Posts Member #: 507 Fastest A Series Mini in the World leeds/wakefield. |
24th Dec, 2005 at 12:17:26pm
Dave ,you should knoiwm not all alluminiums are the same , alluminium in its pure state is soft as poop. but use a good tensile alloy plus run it through the jenny wheel a few times and it will be equally as stiff as the origional,
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 5329 Posts Member #: 140 Proven 200+bhp & Avon Park 05,06,07 Class D 3rd place |
24th Dec, 2005 at 01:03:37pm
mr F or jimster for this question i think. Best 1/4 mile 13.2 seconds @116 mph
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 6274 Posts Member #: 509 Post Whore Isle of Man |
24th Dec, 2005 at 02:53:42pm
i cut mine out 2 fays ago and its in the garage still so will weight it and get back to you "Turbo's make torque, and torque makes fun"
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  4436 Posts Member #: 164 The Stig.. Newport Pagnell |
24th Dec, 2005 at 02:59:37pm
To be honest i can not remember the weight of the floor an battery box combined. i do have it written down in the little MOT logbook..
On 21st Jan, 2011 fastcarl said:
therefore acheiving two things , a sore knob and a beer bellyl |
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Forum Mod 10980 Posts Member #: 17 ***16*** SouthPark, Colorado |
24th Dec, 2005 at 04:00:45pm
I'll just add here that i was talking about the area 'between' the arches - and around 1-2" inboard of the subby mounts - and enough 'all around' to leave a lip on there to attach the aluminum sheet to...
On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better Ready to feel Ancient ??? This is 26 years old as of 2022 https://youtu.be/YQQokcoOzeY |
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Forum Mod 5933 Posts Member #: 784 9 times Avon Park Class C winner Milton Keynes |
24th Dec, 2005 at 07:41:04pm
I was considering fabricating a boot floor out of ally sheet to resemble the original then bond it in with something like Plexus
I seriously doubt it! |
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6274 Posts Member #: 509 Post Whore Isle of Man |
25th Dec, 2005 at 09:32:48am
the bit ive cut out is just enough to fit the curely carbon bootfloor. still havent weighed it though so bear with me.... "Turbo's make torque, and torque makes fun"
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 3341 Posts Member #: 218 Post Whore Bingley, West Yorkshire |
25th Dec, 2005 at 10:56:21am
in the 7kg whats included? are you including the inner wheel arches and the shocker mounts and whatever else you can see in the boot floor area? Previous Engine: 1040cc Morespeed engine, 1275 turbo head T2 Turbo Mirage Manifolds Megajolt
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5795 Posts Member #: 80 AFRacing LTD Newbury, Berks |
25th Dec, 2005 at 12:34:24pm
boot floor
AlexF |
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5795 Posts Member #: 80 AFRacing LTD Newbury, Berks |
25th Dec, 2005 at 12:38:43pm
AlexF |
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 9326 Posts Member #: 59 First mini turbo to get in the 12's & site perv Herefordshire |
25th Dec, 2005 at 01:15:19pm
wheres my grinder? |
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271 Posts Member #: 653 Advanced Member Cambs |
25th Dec, 2005 at 06:40:23pm
Its only a bit of metal. If it blows it blows!
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9812 Posts Member #: 332 Resident Cylinder Head Modifier Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem |
27th Dec, 2005 at 01:38:28pm
right! the removing of the boot flor IMO is insane!
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5795 Posts Member #: 80 AFRacing LTD Newbury, Berks |
27th Dec, 2005 at 02:47:40pm
care to explain why EVER racing mini has the boot floor out then?!
AlexF |
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9812 Posts Member #: 332 Resident Cylinder Head Modifier Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem |
27th Dec, 2005 at 03:49:20pm
Because its as simple as this alex:
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 3329 Posts Member #: 184 Senior Member Melton Mowbray, Pie Country |
27th Dec, 2005 at 04:16:06pm
I don't agree that the boot floor is structural at all. It is a floppy piece of metal. All the rear strength is in the subframe and the box section under the rear seat where the subframe attaches. Removing the boot floor will have no structural effect IMO. http://www.twin-turbo.co.uk
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9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
27th Dec, 2005 at 04:44:50pm
I agree, it does little more than hold the shopping. The subfram has all the strength.
Fastest 998 mini in the world? 13.05 1/4 mile 106mph
On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination, talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry. |
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9812 Posts Member #: 332 Resident Cylinder Head Modifier Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem |
27th Dec, 2005 at 05:24:45pm
well iam sorry gents i cant agree on this one!
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3329 Posts Member #: 184 Senior Member Melton Mowbray, Pie Country |
27th Dec, 2005 at 06:08:30pm
But thats it, we don't remove it and then stiffen it up, we just remove it. As it serves no purpose except holding the shopping, replacing it also serves no purpose.
http://www.twin-turbo.co.uk
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Site Admin  15300 Posts Member #: 337 Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner & TM legend. |
27th Dec, 2005 at 07:40:15pm
Just a point of view;
On 29th Nov, 2016 madmk1 said:
On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else Like fuel 😂😂 |
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