Right here's the questions:

1. Do you see a glass/carbon fibre bonnet as a weight reduction performance benefit or an aesthetic feature?

2. If you were to buy a lightweight bonnet would it be:-

No change from existing bonnet design

With vents, see models below and say your favourite


3. Would you want the bonnet hinged or fully removable?

4. Would you want it unfinished (carbon) or body coloured?

5. How much would you be willing to spend on a lightweight bonnet?

Anything else extra you would like to add?

Thanks guys

Ali

1) Not having looked into the weight difference, aesthetic
2)c) as that may actually be able to be ducted around where my turbo is going for some cooling!
3) Hinged, thats why sockets were invented
4) Body
5) No more than Volvo price (or the price I got an OEM Volvo bonnet for.... )

1) weight reduction
2) f (best of the bunch )but would like to see escort RS turbo or astra gsi vents
3) fully removable for better engine access
4) depends on the cars body colour i.e. would like carbon on a whiye car
5 )no more than £100.00
I have four kids of my own to help with there homework let alone a load of bloody workshy students lol

1. Weight reduction
2. C, that area where holes are has bit lower air pressure on speed so it helps to remove radiator heat and creates nice cooling airflow out from engine room.
3. Hinged
4. Body color is best
5. 50€, I'm poor

1. weight reduction
2. hmm. cant decide between b and c.
3. hinged
4. painted
5. im in the same boat as you, so as cheap as possible...

1) weight reduction
2) at a push B
3) removable or hindge to open the opposite way?
4) NO paint adds to weight and carbon looks sexy
5) £100.00

thanks lee

1. Weight Reduction
2. a
3. Hinge
4. Painted
5. realistically I wouldn't expect to pay less than £200 for a quality carbon fibre item

Thats great guys keep them coming, i've also noted the fiesta and astra vents Mick, was going to do them but needed to get the survey up asap and they'd take more time to model, any other ideas for designs just say though, i'll be looking at airflow a bit later in the project

Ali wrote:Thats great guys keep them coming, i've also noted the fiesta and astra vents Mick, was going to do them but needed to get the survey up asap and they'd take more time to model, any other ideas for designs just say though, i'll be looking at airflow a bit later in the project

Ok, so here is how you should shape those vents:


front of hood will have lower pressure than rear, also vents there won't interfere with aerodynamics, so air goes in at front and gets up to vents, with that kind of shape of vent as in pics it creates even stronger vacuum, but I'm sure you will have access to software that can model airflow and you can notice this very well in there.

That picture is actually not hood vent, but design of shape is same.

I have heard how snow that has get top of that area goes upwards instead of moving along bonnet, when going over 50kph in Golf with bonnet vent placed in such way

1. Weight reduction performance benefit.

2. No change from existing bonnet design.

3. Hinged.

4. Body coloured.

5. Not sure. Maybe 50% more than a standard replacement?

Anything else extra you would like to add?
I'm not sure if my answers will be very helpful. I'd only consider replacing the bonnet if the old one was damaged.

1.Performance (ohterwise whats the point?)

2.F (subaru style )

3.dont mind -hinged is good for the oringinal look but removeble is good for access.

4.Body colour

5.Nothing unless i needed a new bonnet and it was cheaper than a oem replacement.



i love solid works and stuff

I don't have much interest in a CF bonnet, so you don't have to use my answers

1. Weight reduction

2. Existing bonnet design, or maybe very subtle airvernts as Jani Showed. Location of vents should be based on cooling requirements rather than asthetics.

I can't believe no-one noticed this, but you'll need a cutout for the heater grill thing

3. Needs to be hinged so you can quickly open it up to check fluids etc, but it'd be handy it if was easy to fully remove, perhaps a few strong pins on the hinge mechanism?

4. It would obviously depend on if you had a proper modded car where a CF bonnet would be cool. On a stock car CF just looks rice, so body coloured.

5. I can't really say as I'm not really interested. I'd pay £40 maybe, although I know realistically this is far too low.

What software you using Ali? Pro engineer or Auto CAD or something?

It's fairly easy to have a hinged quick release bonnet, I've seen it on a mk1 Fiesta rally car - you just replace the hinge pins with stiff wire with hooks on the end, that just pull out to remove it.

1. If I ever considered one it would be for the performance benefit.

2. Standard I think, as often big vents cause more problems than they're worth by letting water get into the engine bay. I know a few people who've had various vent-related problems (on cars designed with them). I would only consider a vented design if I seriously needed the extra cooling.

3. Removable for better access in the engine bay, with maybe some sort of quick release hinge so you can have it propped up for minor work.

4. Body coloured. Unfinished carbon would look totally wrong on a 300 (as it does on most chav'd up cars IMHO).

5. No idea TBH. £100 is about the max I'd pay for one, wehther that's realistic or not I have no idea.

Hope that helps!!

MJ.. I know its missing, unfortunately haven't had time to model it yet but it will be getting done, just done 12hours straight on the project for the presentation tomorrow. From the research carbon bonnets are more like £450-600 and more like £200 for glass fibre, also combined with the fact you guys wanting body coloured panels starts to make carbon less attractive