Quote:
Originally Posted by AlexR
The low pressure zone to the rear of the bonnet sucks air in, stopping the air from the grille from escaping. It may provide cooler air to the bodies but as an overall thing it's not good.
You need a nice steering wheel to go in there 
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I see what your saying about the low pressure area - standard, the bonnet has a rubber seal that goes inbetween the bonnet and the scuttle top, so as standard there's no area at the back for hot air to escape, so even with the bonnet raised the air not escaping would be just like standard?
Next time im out i'll have a look at the intake temperatures to see the difference between ambient and when driving.
I don't know one thing about aerodynamics as you guys can probably tell