Weight Difference Between Carbon Fibre And Steel?

[Freeman]

Hey just wondering, what is the weight difference between a normal r33 bonnet and a carbon fibre version? I dont know much about carbon fibre but ive felt the weight of a normal one and im guessing theres a significant difference.

and i tried to post this in the bodykit/aero section where i thought it would go but it wouldnt let me, whats the go?

Thanks

[lwells]

Covered a number of times

http://www.skylinesaustralia.com/forums/in...90&b=1&st=&p=

Lucien.

[midnight]

It depends on the build, I had a fiberglass silvia bonnet that weighed half of the carbon ones on the market.

[lwells]

It depends on the build, I had a fiberglass silvia bonnet that weighed half of the carbon ones on the market.

<{POST_SNAPBACK}>

And had, what, a tenth of the strength

LW.

[midnight]

it was bendable to some extent so strength was not an issue...

[Freeman]

thanks for that fellas

[scathing]

And had, what, a tenth of the strength

The bonnet isn't a load bearing structural component, and generally any accident that stresses the bonnet is usually a sizable one, which means you have other concerns.

As such, who cares how strong it is? Unless you're planning on spending a lot of time sitting on it, or having some lycra-clad bimbo doing that, as long as it supports its own weight its strong enough.

[Memph]

The bonnet isn't a load bearing structural component, and generally any accident that stresses the bonnet is usually a sizable one, which means you have other concerns.

As such, who cares how strong it is? Unless you're planning on spending a lot of time sitting on it, or having some lycra-clad bimbo doing that, as long as it supports its own weight its strong enough.

<{POST_SNAPBACK}>

lol, well said..

And i agree..

though with my R32 GTST... when the front of my car said gday to the back of an Ford EA wagon... Its rear bar was higher than my front bar so pretty much the only thing that got hit was my bonnet

[scathing]

Its rear bar was higher than my front bar so pretty much the only thing that got hit was my bonnet

<{POST_SNAPBACK}>

How hard did you hit? Conceivably it could have been enough to crack CF too. Its not like your average street car CF components are built to the same engineering and quality control as a race car, especially since most are just CF overlaid on fibreglass anyway.

At which point you'd be up for a new bonnet regardless of what it was made of.....and I know which one I'd rather pay for.

If I ever replace my bonnet and want the dark weave, I'll probably go for a CF overlaid 'glass bonnet. As long as it weighs less than my factory one and doesn't cost me a fortune, it'll do.

[lwells]

The bonnet isn't a load bearing structural component, and generally any accident that stresses the bonnet is usually a sizable one, which means you have other concerns.

As such, who cares how strong it is? Unless you're planning on spending a lot of time sitting on it, or having some lycra-clad bimbo doing that, as long as it supports its own weight its strong enough.

<{POST_SNAPBACK}>

My point was its not like fibrglass has a weight-to-weight advantage over C/F.

LW.

[midnight]

yeah but if people wanted strength theyd stick with the stock bonnet.

[scathing]

My point was its not like fibrglass has a weight-to-weight advantage over C/F.

midnight says that his fibreglass bonnet is lighter than a CF one. Unless its fallen apart on him, its strong enough to do the job.

No it doesn't have a weight to weight advantage, but it has a weight to strength necessity advantage.

Any strength over a margin above minimum requirements is wasted (especially on a component that isn't called upon to sustain loads), and if the tradeoff is extra weight then its a performance deficit too.

[lwells]

midnight says that his fibreglass bonnet is lighter than a CF one. Unless its fallen apart on him, its strong enough to do the job.

No it doesn't have a weight to weight advantage, but it has a weight to strength necessity advantage.

Any strength over a margin above minimum requirements is wasted (especially on a component that isn't called upon to sustain loads), and if the tradeoff is extra weight then its a performance deficit too.

<{POST_SNAPBACK}>

You'd think I had killed his dog or something.

Midnight pointed out an advantage of a fibreglass bonnet, I alluded to what some might see as a weakness. I seem to recall some posts awhile ago from people who had issues with the hinges sheering on one brand of FRP bonnet due to a lack of strength.

The weight comparisons to C/F bonnets can also be misleading: most people think their $800 "C/F bonnet" is the real deal when its little more than an FRP bonnet with a C/F top skin.

[scathing]

You'd think I had killed his dog or something.

The weight comparisons to C/F bonnets can also be misleading:  most people think their $800 "C/F bonnet" is the real deal when its little more than an FRP bonnet with a C/F top skin.

I loved Buster!

True about the composition, though. Most carbon bonnets are FRP with a wet CF skin, but that should weigh close to a pure FRP bonnet.

A pure dry CF bonnet should weigh a bit less and be a lot stronger, but that stuff is expensive.

[Freeman]

I don't think it would really matter if it was fibreglass on the inside, as long as there was a a good weight advantage over stock.

Hmm yeah i remember that thread about the CF bonnet flying off looked nasty. How quick was it going though? I thought it was doing a top speed run and was highly modified, lol i dont think that will be a problem for me