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hotgemini
Occasional Poster


Location:
Brisbane, Queensland
Registered:
April 2003
Re: Roll Cage Designs - AE86 / KE70 Specs Sun, 28 August 2005 12:36 Go to previous messageGo to previous message
It really isn't a lot of weight and the improvement to vehicle dynamics with a well-built rigid cage really shouldn't be underestimated. Using rough figures from my memory of the last cage I helped build I think that the cage as per the first gif I posted should come out at about 50kg including the mounting plates, so whilst its not light its not unworkably heavy.

The rigidity of a comprehensive cage really does make a marked difference to how a chassis behaves, back when we ran in GTP despite the fact that we would usually have to work reasonably hard to keep our cars down near the minimum weights we still ran a more comprehensive ROPS because the comparisons between our earlier built cars showed that you got better control of the suspension which more than offset any weight or CoG penalty. So even ignoring that I'm talking fairly high level motorsport, take it back to AGP2002's case, he ends up with a car which has greater potential for good handling *AND* is safer, apart from cost I really think its a win-win.

As an aside, one of the cars we ran for a while came with an alloy-cage (allowable as it was log-booked prior to the requirement for steel cages) now we had to run a significantly different spring rate in that car and it still wasn't as nice to drive, in the end the owner modified (note: not permitted under cams rules but thats life) the cage to add much more triangulation to the alloy cage and even that made the car drive much nicer.

But other than disagreeing on how much cage is appropriate I congratulate muvro on an excellent post.
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SubjectPosterDate
Read Message   Roll Cage Designs - AE86 / KE70 Specs agp2002Tue, 23 August 2005 00:16
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs takaiTue, 23 August 2005 00:23
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs bbaacchhyyTue, 23 August 2005 00:39
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs agp2002Tue, 23 August 2005 02:12
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs takaiTue, 23 August 2005 04:54
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs agp2002Tue, 23 August 2005 05:23
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs Cool1Wed, 24 August 2005 10:54
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs RedwarfWed, 24 August 2005 11:36
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs Rex_KelwayWed, 24 August 2005 15:07
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs agp2002Wed, 24 August 2005 16:56
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs beradFri, 26 August 2005 00:36
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs rthyFri, 26 August 2005 03:21
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs MR 1JZFri, 26 August 2005 03:25
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs agp2002Fri, 26 August 2005 03:35
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs Steve-AE86Fri, 26 August 2005 10:15
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs kingmickSat, 27 August 2005 04:59
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs agp2002Sat, 27 August 2005 12:49
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs hotgeminiSun, 28 August 2005 04:00
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs hotgeminiSun, 28 August 2005 04:41
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs hotgeminiSun, 28 August 2005 06:42
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs takaiSun, 28 August 2005 06:47
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs hotgeminiSun, 28 August 2005 07:50
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs takaiSun, 28 August 2005 07:54
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs hotgeminiSun, 28 August 2005 08:06
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs takaiSun, 28 August 2005 08:25
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs hotgeminiSun, 28 August 2005 08:30
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs beradSun, 28 August 2005 08:31
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs hotgeminiSun, 28 August 2005 08:34
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs muvroSun, 28 August 2005 10:19
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs agp2002Sun, 28 August 2005 12:13
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs  hotgeminiSun, 28 August 2005 12:36
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs agp2002Sun, 28 August 2005 12:53
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs muvroSun, 28 August 2005 13:29
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs hotgeminiSun, 28 August 2005 23:10
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs takaiMon, 29 August 2005 00:11
Read Message   Re: Roll Cage Designs - AE86 / KE70 Specs takaiMon, 29 August 2005 11:49
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