any aerodynamics experts out there

[terryobeirne]

i have just started to try to learn something about race car aerodynamics, especially as it applies to production type cars being used for amateur racing. i have done some wool tuft testing on one of my cars and i need someone with more experience than me to offer comment. from what i can see, the flow lines seems OK at the front and down the side going into the air intake, but i'm not so sure about the downward pointing tuffs near the sill, and the around the rear wheel arch/spoiler. The sill ones mifght suggest its turbulent there and possibly i need some skirts to stop flow going under???. down the back, it could be just typical of an open car??. be happy to receive any comments at all from people more used to studying this stuff. thanks