Just fitted the roll bar in the Griff
Discussion
It's in and it looks very tasty.
Not a job for the faint hearted though. Glad I've got the rear suspension off at the moment, it would have been more of a struggle otherwise. Just got to make the floor good around the holes now and then I can put the interior back in.
Better get back to the decorating quick before the wife comes home !
Colin.
Not a job for the faint hearted though. Glad I've got the rear suspension off at the moment, it would have been more of a struggle otherwise. Just got to make the floor good around the holes now and then I can put the interior back in.
Better get back to the decorating quick before the wife comes home !
Colin.
Theres instructions on here on how to post, it's dead easy even for an amature like me
http://ph.uncle-dave.co.uk/upload/
http://ph.uncle-dave.co.uk/upload/
Equinox said:
Theres instructions on here on how to post, it's dead easy even for an amature like me
http://ph.uncle-dave.co.uk/upload/
good ol' uncledave to the rescue
How long did it take you guys to fit? Am interested in fitting one to my Chim but balking at the £500 fitment charge quoted so far.
Is it something that can be done without much major disassembly of the vehicle? Mine will be a daily driver soon so it would have to be done in a weekend.
Is it something that can be done without much major disassembly of the vehicle? Mine will be a daily driver soon so it would have to be done in a weekend.
old64er said:
Theres instructions on here on how to post, it's dead easy even for an amature like me
http://ph.uncle-dave.co.uk/upload/
good ol' uncledave to the rescue
Looks good Quinny!
And £900? How the
do they justify that? >> Edited by UncleDave on Monday 20th February 20:06
For some daft reason insuring with a roll bar can be difficult (you'd think it ought to bring the premium down with the advantage of reducing personal injury). All you DIYers beware that many insurance companies will insist on a 'professional' installation. I imagine they'd similarly baulk at a roll bar you made yourself. My company only increased the excess, but insisted on 'professional installation'. IF you DIY you might be able to convince the ins. co. with an independent engineer's report - but of course that costs money too...
One of the reasons is that if the roll bar is not designed correctly and fitted so that it will survive a crash, it could actually make the car a more unsafe in an accident. One of the main issues is the fact that many designs have the roll bar next to someone's head so in any type of shunt the risk of serious head injury is increased. When looking at pictures, imagine where your head will be. If it is underneath or alongside the bar, it is like driving along waiting to be hit with a baseball bat. Any shunt will bring the roll bar in contact with the head as the whiplash causes your head to hit the bar. Trouble is that this type of accident is more likely than a roll over. If I look at Quinny's bar it has this flaw that the bar is too close to the head and the mounts don't meet the MSA recommendations either. In an accident the bolts are likely to shear and the bar come loose. The factory roll bar also made the same mistake which is one of the reasons it was discontinued. The MSA recommendations are the absolute minimum for any design IMHO.
If you want a rollbar to increase your safety then it needs to be designed to do so. It isn't a case of simply bending a bit of metal and bolting in place which is why the good ones are expensive.
The problem is that the insurance companies pick up the bill and that is why they can be a little wary.
A correctly designed and fitted roll bar generally doesn't add to the insurance bill.
All this has been covered in the forums before BTW.
If you want a rollbar to increase your safety then it needs to be designed to do so. It isn't a case of simply bending a bit of metal and bolting in place which is why the good ones are expensive.
The problem is that the insurance companies pick up the bill and that is why they can be a little wary.
A correctly designed and fitted roll bar generally doesn't add to the insurance bill.
All this has been covered in the forums before BTW.
If you get hit from the side or rear, that bar is going to pop your head open like an egg dropped on a stone floor. It looks absolutely terrifying to me.
I have the Rollcenter bar, which goes behind the seat headrests, plus I have it covered in FIA foam, and it's not beside your head, so can't hit it in a side impact. And you're far more likely to get smacked up the arse at a junction than you are to roll over.
I have the Rollcenter bar, which goes behind the seat headrests, plus I have it covered in FIA foam, and it's not beside your head, so can't hit it in a side impact. And you're far more likely to get smacked up the arse at a junction than you are to roll over.
What if you are a professional engineer?
Are there any drawings available copied from a rollcentre bar? Actually manufacturing one would be very cheap as long as you had drawings for reference. A bit of trial and error otherwise which is the hard bit.
I expect those bolt-on bars would be ok if they were properly triangulated and welded on to the chassis.
Are there any drawings available copied from a rollcentre bar? Actually manufacturing one would be very cheap as long as you had drawings for reference. A bit of trial and error otherwise which is the hard bit.
I expect those bolt-on bars would be ok if they were properly triangulated and welded on to the chassis.
There are quite a few roll bars that have been made by professional engineers that do not offer any protection and/or reduce the safety of the occupants in normal more common crashes. Usually have the words for cosmetic use only associated with them. What that means in reality is that the correct design and manufacturing processes were not followed and the liklihood of the bar to performing its protection task is unknown. All you can do is ask the right questions:
Do you make roll cages for a living?
Have any of your cages/roll bars been approved/certified?
What design code/rules do you use?
What experience do you have from manufacture and design that this item will increase safety and not reduce it?
Would you trust your head to a design from a source that couldn't answer these type of questions satisfactorily? I wouldn't.
PS I hope you are not advocating the stealing of the design BTW. The RollCentre bar is not in the public domain. A lot of time and money went into its development.
>> Edited by shpub on Tuesday 21st February 14:05
Do you make roll cages for a living?
Have any of your cages/roll bars been approved/certified?
What design code/rules do you use?
What experience do you have from manufacture and design that this item will increase safety and not reduce it?
Would you trust your head to a design from a source that couldn't answer these type of questions satisfactorily? I wouldn't.
PS I hope you are not advocating the stealing of the design BTW. The RollCentre bar is not in the public domain. A lot of time and money went into its development.
>> Edited by shpub on Tuesday 21st February 14:05
shpub said:
PS I hope you are not advocating the stealing of the design BTW. The RollCentre bar is not in the public domain. A lot of time and money went into its development.
>> Edited by shpub on Tuesday 21st February 14:05
Nothing wrong with it if it isn't patented but no I wouldn't advocate stealing a design and then profiting commercially from it. I expect rollcentre have put more design effort into theirs than TVR have with the factory fit items.
Just saying that a qualified person is capable of making a judgement as to the benefits and possible disadvantages of their own design. Just because something doesn't originate from one of the established TVR 'names' doesn't mean it is no good.
I agree that as long as you have taken care to pad the bar properly and made sure it is nowhere near your head then anything is probably better than nothing. After all some of those full race cages are pretty close (although admittedly they are wearing helmets.) I think a full race harness would minimise your chances of injury anyway.
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