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Carbon Fibre Bonnets

Rozza

By Rozza,
in New South Wales

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sewid Grand Master

sewid

Posted
Posted

It's incorrect to say that a bonnet is illegal simply because it is made from carbon fibre. If this was true how could all the R34 GTR V-Spec II's with carbon bonnets from the factory be roaming the streets. Is a carbon bonnet illegal because it shatters? What about a carbon roof like in the new M3? Wouldn't that also pose some crazy risk in a rollover...

Please link to the relevant legislation saying that bonnets made from carbon fibre are illegal.

Auto Group Buy Collaborator

Auto Group Buy

Posted
Posted
It's incorrect to say that a bonnet is illegal simply because it is made from carbon fibre. If this was true how could all the R34 GTR V-Spec II's with carbon bonnets from the factory be roaming the streets. Is a carbon bonnet illegal because it shatters? What about a carbon roof like in the new M3? Wouldn't that also pose some crazy risk in a rollover...

Please link to the relevant legislation saying that bonnets made from carbon fibre are illegal.

The reason why GTR V spec and M3 have approved CF products because they go heaps of safety and crash test. They show the results on the paper and video to prove its safe for that car only for street use.

sewid Grand Master

sewid

Posted
Posted
The reason why GTR V spec and M3 have approved CF products because they go heaps of safety and crash test. They show the results on the paper and video to prove its safe for that car only for street use.

Yes this is obvious but thanks for posting it.

All I'm saying is to say a carbon fibre bonnet is illegal is not correct. To suggest a carbon fibre bonnet cannot be as strong or crash as safely is another falsity as Nissan would not be able to sell them otherwise.

Bullet32 Veteran

Bullet32

Posted
Posted

To settle this properly...Contact the RTA - under the freedom of information act you get get them

to e-mail the official regulations to you.

I know because I did it with wheel and tyre regulations and they e-mailed me a 70 page pdf file

with every rule and regulation on wheels and tyres in NSW / ACT.

R338OY Veteran

R338OY

Posted
Posted

This must be a grey area- far as i know carbon fibre is stronger than steel. So there must be some way around regulations. Yeh i'd day some bonnets are ADR approved, from an assumption anyway.

Best to find out cause it's an EASY way to get defected.

sh@un Grand Master

sh@un

Posted
Posted

i remember one of the concerns Holden had when they were going to put the HRT427 into production was that they might not be able to get the 100% CF bonnet to crumple in a head on collision like a steel or alu one would, and thereby posing a threat to occupants when the bonnet comes through the windscreen. the problem isn't strength, but a lack of deformability (i.e too much stiffness)

like others have said- CF bonnets aren't illegal per se, but where can you buy an aftermarket one that has satisfied the ADR's with regards to crash regulations for your particular car?

MK2 Experienced

MK2

Posted
Posted

Bodywork and interior

There are general requirements concerning alterations to the bodywork:

No alteration may cause a hazard to persons due to exposed sharp edges or projections; and

No alteration may cause a reduction in the level of safety or overall strength of the vehicle.

and-

Front structure

Where ADR 10B, 10/00 or 10/01 applies, the front of the vehicle is sometimes designed to crush on impact to

absorb crash forces. Any structural modifications in this area should only be made on the advice of an engineering

signatory experienced in body and chassis structures

RTA NSW- PDF of light vehicle modification guidelines

Basically, if you can get the engineer to sign off on it, then it's legal, if they won't, it ain't legal.

Got Boost? Experienced

Got Boost?

Posted
Posted

They are not illegal, if you goto Custom Carbon in Brisbane they can make you a carbon fiber bonnet from scratch that is compliant, has the relative strengths and safety features to comply with ADR and still looks the goods. The law has to do with the underside structure and bracing and the way the vents are facing (if they are facing the windscreen they say oil may spray through it onto the screen obstructing your view) The guys there have done plenty of bonnets which you see on cars every day, such as the HLUCN8 GTR. Give them a call if you want info on them.

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