Styling Bonnet vents

[cc1]

I've got to take my car back for respray as the paints still soft after 3 months.
Was thinking of fitting a bonnet vent at the same time but can't find a suitable one. Some thing to fit in front of the washer jet maybe?

Does anyone know any good webb sites to browse?

 

[J333EVO]

There was pics of a Renault 19 16V vent on a yellow Cinq in about the position you mention, can be lucky and get one from scrap yard as the real thing is so much better than the cheap copy stuff.

Or I had the bonnet on my turbo Cinq vented from here

http://www.coollouvres.com/

 

[custard]

fimmo had it on his cinq,check his gallery

 

[J333EVO]

Yeah it was his Cinq but there is only 4 pics in his gallery, though decent one of a Sei bumper on a Cinq which has no relevance here but thought I'd put it up anyway

 

[custard]

yeah was a nice cinq,was on ebay a few months ago

 

[cc1]

I quite fancy this.

Bit much tho.

 

[balidey]

I thought about getting some vents for a while, but have since gone off the idea. But my prefered ones were late HF Turbo vents. Like these

http://cgi.ebay.co.uk/LANCIA-DELTA-...ryZ31352QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

 

[cc1]

Bit ugly. Looking more at the descrete under bonnet type.
Quite like this though, but might be too big to fit wthout cutting into the strengthening bars..

 

[Sei_rory]

why dont you get some cut outs and meshed ?

 

[custard]

i would go with kool louvres TBH
understated and practical

 

[cc1]

The cars going in Thursday morning so no time now for postal deliveries.
Shame. Would have been nice to do take advantage of the situation.

I was reading an article on bonnet vents and it said that the closer to the windsreen the more positive the pressure can be above the bonnet, so the placement and design of a vent is important for it to work properly.
I wanted negative pressure (extract) but this seems to be at the front of the bonnet.
Nothings ever simple..

Cheers for the input..

 

[soopahfly]

One from an astra gte?

 

[custard]

that was what i was gonna use.probably still got them somewhere

 

[rallycinq]

Front of the bonnet facing backwards is negative. Front of the bonnet facing forwards is positive.

As you move towards the back of the bonnet the air going up over the windscreen leads to a low pressure area there.

Cheers

D

 

[J333EVO]

You want a lesson in vents then look no further than an integrale EVO front, apart from the obvious rad grill and oil cooler grill below number plate, the headlamps have vents around them to allow air to flow into engine bay, the right hand side specifically for air filter feed, three vents along the front rear facing to extract heat from manifold/engine bay, and one along the ear forward facing to bring air into cabin/heaters.

 

[K4RL]

why dont you get some cut outs and meshed ?

yeah like what i did with my first cinq.

i cut the abarth scorpion out right above the air filter just make sure you put a rain tray under it though. you dont want to litterally flood the engine, lol

 

[cc1]

Front of the bonnet facing backwards is negative. Front of the bonnet facing forwards is positive.

As you move towards the back of the bonnet the air going up over the windscreen leads to a low pressure area there.

Cheers

D

In theory, if air passes over a vent, you create negative pressure and it extracts. If the air pressure at the bottom off the vent becomes more negative, then air gets supplied down the vent.
In an engine compartment, the air gets dragged under the car so at or near the bulkhead it would become a vacuum so, if a vent is introduced at the rear of the bonnet it should (in theory) help air flow downward and remove the heat under the car.
The only problem is, Which pressure is greater? Under the car or over the bonnet?

 

[randomizered]

anyone tried an adjustble vent? either a flap, or a hosing you can reserve....theory is great, but actual trials are best

Quite often its look sthat win though

Kristian

 

[cc1]

Don't you get that sort of thing on those crap exhausts to adjust the volume.

 

[jamie86]

yeah like what i did with my first cinq.

i cut the abarth scorpion out right above the air filter just make sure you put a rain tray under it though. you dont want to litterally flood the engine, lol

Not the best pic but.....