Just wondering if anyone has ever vented a bonnet to expel/extract heat.
If so, how effective was it?
Were the vents used more of an 'add on' nature or were they the primary air extraction (instead of under the car)
I have seen people lift the back of the bonnet, but I think that would probably release air on the sides rather than the back, as the rear of the bonnet is usually in a high pressure area at the base of the screen and the aero would probably be screwed over in the process.
I don't really like vents and crap in the bonnet, but I'm happy for form to follow function if required.
I'd prefer something a little more subtle and less ricey than the vent below if possible, but aerodynamically it is actually quite soundly designed.
The goal is to give the primary airflow through the radiator an easy evacuation route and to reduce high pressure under the car.