CF Bonnet or Engine damper??

http://www.dotars.gov.au/transreg/vs...s_3Feb2006.pdf

Check this out for evidence. Sections 2.7 and 4.3 are most relavent to this subject (to save you reading the whole thing). In a nutshell pre 1971 vehicles can have fibreglass or other composite material panels as replacements, but post 1971 vehicles must comply with ADR 69/00 about frontal impact collisions. Essentially no car crashed in test situations is allowed to project the windscreen or dash towards the occupants and that is why CF bonnets fail.

this forum makes me laugh.


id go a cf bonnet man :thumbsup:

Seeing as there's been no discussion in regards to the engine damper I'd suggest considering the extra engine vibration transferred to the chassis, in particular the cabin comfort. Fine for the track but may be considered a little intrusive for a street driven car.

Comments?

Today, 10:31 PM
KWICKS
This message has been deleted by bennjamin. Reason: no more. Keep it to pm.

:confused:

I've made the most valid, supported point here and you delete my posts? I'm sorry but I thought your role was to facilitate forum participation. I would have emailed you but you have this feature turned off. I offered an alternative mod to an illegal one for appearance only (no weight saving granted) at significant saving. The post that should have been deleted is the one based on hearsay. You can delete this too once read as it was intended for your eyes only.

Quote:

---

Nice sig JasonGilholme

---

Is hardly on topic , mate. You "expanded" on points myself and others have already said.
Point is , its covered and verging on bitching so as i said ~ "keep it to pm".



ANYWAY - as T-onedc2 said - does anyone here run a engine damper on a daily basis ?
I woudl think they are MORE harsh than any mounts could be (since holding the max point of leverage?!) , and wouldnt last as long ?

Quote:

---

Originally Posted by yourfather

JUST TO POINT OUT.

If you are hitting a pedestrian in a road accident hard enough to bend metal, they're dead anyway.

---

dunno about that. Car metal bends pretty easily. I think anyone whos had a minor 'incident' in their cars, or has had something dropped on their bonnets (like i have :wave: ) will tell you that stuff bends pretty well. The idea is that it can make the difference between sever injury or death.

Quote:

---

Originally Posted by KWICKS

http://www.dotars.gov.au/transreg/vs...s_3Feb2006.pdf

Check this out for evidence. Sections 2.7 and 4.3 are most relavent to this subject (to save you reading the whole thing). In a nutshell pre 1971 vehicles can have fibreglass or other composite material panels as replacements, but post 1971 vehicles must comply with ADR 69/00 about frontal impact collisions. Essentially no car crashed in test situations is allowed to project the windscreen or dash towards the occupants and that is why CF bonnets fail.

---

no, that is NOT why carbon fibre bonnets "fail".

it is ONLY why carbon fibre bonnets not tested are illegal.

once tested they CAN be legal...

make sure you reveal all the parts to the puzzle KWICKS - then you can call people dickheads...

for example:

Mazda RX7 SP (Series 6)

is imported into Australia, yet has a OEM carbon fibre bonnet?

oh and JasonGilholme - check your neg. post quality score in regards to your signature...

Quote:

---

Originally Posted by tinkerbell

no, that is NOT why carbon fibre bonnets "fail".

it is ONLY why carbon fibre bonnets not tested are illegal.

once tested they CAN be legal...

make sure you reveal all the parts to the puzzle KWICKS - then you can call people dickheads...

for example:

Mazda RX7 SP (Series 6)

is imported into Australia, yet has a OEM carbon fibre bonnet?

---

These are factory equipped and as such not subject to the laws governing the modification of light motor vehicles that I quoted. As an absolute you could argue that CF bonnets can be made legal, but you would need an engineer to sign off on it after an equivalent planar sheet of the same CF material was tested in a NATA certified laboratory in Australia, and then still need it to undergo a frontal collision impact test to determine if the material forced the dash back on to the occupants as per ADR 69/00. That cost is prohibitive and it is why no-one has yet done it - even the suppliers/manufacturers of these products - so it is in effect illegal. By all means our modifier should put up the readies and pay for all of this testing so the mod can be legal in NSW and do all the hard work for eveyone else to follow in those footsteps. As it stands this mod cannot guarantee the safety designed into the car will not be compromised and is therefore illegal. I'm done making this point now. :)

Quote:

---

Originally Posted by KWICKS

As an absolute you could argue that CF bonnets can be made legal,

---

i.e. your "reasons" stating why they are illegal in post 12 are inaccurate...

Quote:

---

Originally Posted by KWICKS

Reason is the CF bonnet is made from a material that is so much stronger than aluminium or steel that it will not bend in a crash and defeats the purpose of the car's designed crumple zones, removing safety. It may shatter and reduce resistance to an impact increasing the forces in the crash or it may hold in one piece which could be worse - it could then come straight through the firewall or windscreen and decapitate the driver. Its also flammable.

---

the only "reason" they are illegal is that they are usually not tested under ADR69...

not becasue of any inherent properties of carbon fibre, as you have suggested...

I know a little about these products through exposure, but I'm done arguing. They look good, save weight and are not *proven* to reduce safety IN AUSTRALIA (google UK data ;) ). So go and get one. Never know your luck - they may register you in QLD or TAS.