Gear Monkey
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| posted on 13/1/12 at 11:44 AM |
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Scuttle framework?
Hello,
Those that have fitted a GRP scuttle have you bothered with a framework to provide support or just fitted brackets to the chassis to hold it in
place?
Many thanks
Gear Monkey
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wylliezx9r
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| posted on 13/1/12 at 11:57 AM |
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No frame work required as long as the scuttle has been made correctly.
I spent a lot of money on booze, birds and fast cars. The rest I just squandered.
George Best
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jossey
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| posted on 13/1/12 at 12:33 PM |
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is worth supporting it just incase you have friends like me who stand on it to reach stuff in the ceiling space lol
Thanks
David Johnson
Building my tiger avon slowly but surely.
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mangogrooveworkshop
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| posted on 13/1/12 at 02:33 PM |
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quote:
Originally posted by jossey
is worth supporting it just incase you have friends like me who stand on it to reach stuff in the ceiling space lol
change you friends or empty their pockets ......
Ive beaten a scuttle out of ali before standing on it would be 
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ginger ninja
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| posted on 13/1/12 at 04:30 PM |
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Although glass fibre scuttle is usually solid enough without any additional support, I fabricated a simple frame (similar to a roll hoop in appearance
) which sits just behind the dash board to support the stearing column and bike clocks,etc. This not only gives a very solid fixing for the column,
but also allows the scuttle to be lifted off easily and quickly for better access because nothing is attached to it. Appreciate things might not be so
simple for a road spec car though.
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Gear Monkey
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| posted on 13/1/12 at 08:31 PM |
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Ok......I've been thinking (again!) I've attached some drawings of a design that would I believe provide a considerable improvement to the
stiffness of the chassis without adding too much weight. While the drawings are showing 25x25mm box, should I actually add this it would be made from
19mm 16swg tube which would only weigh a 4 or 5 lbs in total and would sit within a standard scuttle and provide it with a stable mounting point.
 
What do you chaps think?
GM
[Edited on 13/1/12 by Gear Monkey]
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MikeRJ
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| posted on 13/1/12 at 08:47 PM |
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I'm sure it could add some stiffness to the engine bay but I suspect the large unbraced rectangle right behind the engine bay (i.e passenger
compartment) will dominate.
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Gear Monkey
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| posted on 13/1/12 at 09:26 PM |
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I've not put the bracing on the picture, I pulled the image from the sketch up library and just added the parts I've mentioned. Assume the
normal bracing plus Aussie mods will be in position.
GM
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Badger_McLetcher
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| posted on 13/1/12 at 09:48 PM |
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You've found a way of incorporating your passengers into the chassis as bracing? Is it terminal? 
Edit: On a serious note, didn't Cymtriks' mods do something like that?
[Edited on 13/1/12 by Badger_McLetcher]
If disfunction is a function, then I must be some kind of genius.
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skov
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| posted on 14/1/12 at 06:38 AM |
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Interesting idea, but you might want to check where the inlet manifold sits.
It's pretty big on the MX5 and I ended up having to cut out TR5 to get my engine in...
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JonBowden
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| posted on 14/1/12 at 12:26 PM |
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I think you might get extra benefit if you also braced the bottom of the scuttle (bottom of dashboard) to the transmission tunnel
Jon
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Mad Dave
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| posted on 14/1/12 at 12:58 PM |
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The framework you have shown is actually in front of where the scuttle fits.
Road Runner Racing's SR2 has chassis bracing under the scuttle. The scuttle doesn't fasten to it, just sits over it as there is enough
strength in the fibreglass
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