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Jul 19, 2009 22:54:20 GMT
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Last Edit: Jul 19, 2009 22:55:05 GMT by retrowagen1234
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stealthstylz
Club Retro Rides Member
Posts: 14,956
Club RR Member Number: 174
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Stiffening a bodyshell ?stealthstylz
@stealthstylz
Club Retro Rides Member 174
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Jul 19, 2009 23:05:43 GMT
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You need to stitch weld the seams (usually 1" of weld, 1" gap, 1" weld etc) to stop cracks propagating. A full cage is the only way to fully stiffen it really. You could weld a rear strut brace in, then run bars down to the floor.
What about running a bar across the A pillars then bars out to the front strut tops. Not sure how much strength this would add though?
Matt
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I'd find a race series that uses or used the cars you are modifying and go look at one and see whats been done, no point adding weight where its not needed and it is possible to make a shell to stiff and it'll damage itself on the road if theres no flex at all.
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Volvo back as my main squeeze, more boost and some interior goodies on the way.
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93fxdl
Posted a lot
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Posts: 2,015
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many moons ago I had a ford rs catalogue and one of the sections was shell stiffening and for a mk 1/2 escort it was stitch weld the chassis rails to the floor and the main part was stitching all the parts of the strut towers together and also to the inner wing and finally a triangular section was added to brace the front chassis to the bulkhead, so possibly this may give you a few ideas, also a friend was involved with a few race cars and something they did was to brace from the strut towers to the full cage with bars through the bulkhead .
ttfn glenn
ps the rs book did say that shell stiffening wasnt needed for road and track just rallying
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Last Edit: Jul 20, 2009 9:19:25 GMT by 93fxdl
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kee
Posted a lot
Posts: 4,991
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a simple cage will do the trick nicely. for an old polo a rear strut brace won't make masses of difference but on very hard cornering will help a little. Stitch weld the chassis rails and strut towers not much else needs it. front upper and lower braces will help.
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Jul 20, 2009 11:57:01 GMT
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wicked, cheers for the advice guys  and on the race series side of things, the only thing i can think of is the berg cup..... and going to europe just to have a look at some welding seems a but much lol |
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Potter
Part of things
'E who dares wins,eh Rodders??!
Posts: 304
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Jul 20, 2009 12:54:27 GMT
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About the stitch welding.
I once read something somewhere about it doing real bad things to a shell.I can't remember any details but I think it said the shell would warp as a result?
Kickin myself here for not saving the link. Anyone conform this or maybe add some input??
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More cars than sense or money!🙄
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kee
Posted a lot
Posts: 4,991
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Jul 20, 2009 12:56:58 GMT
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only if you do complete welds along all seams. do as stealthstylz said and you should be fine.
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berendd
Europe
why do I need 3 keys for one car?
Posts: 1,449
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Jul 20, 2009 13:14:36 GMT
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Jul 20, 2009 17:02:36 GMT
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oooh kool cheers dude, not realy wanting to use a subframe tho , had a mk2 with one before and it just felt too golf like somehow...
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qwerty
Club Retro Rides Member
Posts: 2,419
Club RR Member Number: 52
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Stiffening a bodyshell ?qwerty
@qwerty
Club Retro Rides Member 52
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Jul 20, 2009 17:05:50 GMT
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I seem to remeber someone welding a tube in between the end of the chassis leg and the front panel on a mk3 Polo as there is a hefty gap, and this supposedly helped???
Not really a subject I know much about but that was just something i'd seen done before.
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kee
Posted a lot
Posts: 4,991
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Jul 20, 2009 17:15:05 GMT
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great choice of first picture by the way  |
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berendd
Europe
why do I need 3 keys for one car?
Posts: 1,449
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Jul 22, 2009 11:53:08 GMT
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a frame may be a bit over the top but a front lower brace is really helpful for getting round corners
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Jul 22, 2009 12:02:39 GMT
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yeah I'm thinking upper and lower braces on the front, and maybe stitch weld the rear.... if i don't like that i can allways add to it... whereas if i find it doesnt need a rear brace its going to be a pig to get rid of
and i thought you would like that mk1 pic KEE
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berendd
Europe
why do I need 3 keys for one car?
Posts: 1,449
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Jul 22, 2009 12:08:59 GMT
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there are braces for the rear too, that mount on the strut tops..
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Jul 22, 2009 14:17:29 GMT
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realy? arnt they those real cheap ones tho, that don't do anything and look it too ?
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and on the race series side of things, the only thing i can think of is the berg cup..... and going to europe just to have a look at some welding seems a but much lol
