Aerodynamics of a bug

[graham]

Thanks for the replies fellas its all good information.

Something else I have been pondering about is running boards.I got wider than standard on my car as my wings/fenders have been widened.I will be taking them off soon to give them a tweak.
I was wondering about putting fibreglass flat bottoms on them with just access for the fixing bolts.Not sure if this is worth the effort though ? would the added weight of the fibreglass out weigh any aerodynamic gain, any thoughts ???

Looking forward to getting some serious time on the car soon so i'm gearing up for what I want to do.