# 1STGEN's scirocco **URL:** \ **Category:** Builds\ **Created:** [February 17, 2009, 10:09am UTC](https://forums.speedlife.net/t/1stgens-scirocco/242194 "2009-02-17T10:09:48Z")\ **Posts on this page:** 1\ **Showing post:** 16
**Author:** ![Boxersix](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/boxersix/32/6327_2.png) [@Boxersix](https://forums.speedlife.net/u/Boxersix)\ **Post date:** [February 20, 2009, 7:49pm UTC](https://forums.speedlife.net/t/1stgens-scirocco/242194/16 "2009-02-20T19:49:49Z")
> [@Ahh, how I love poker](https://forums.speedlife.net/t/ahh-how-i-love-poker/14497/12): > > Why would you put side plates on a front air dam? You are creating drag city if there is no pressure area right behind the slitter itself (called air dam because of it) because the bumper is there. All straight vertical end plates would do here is impede air flow on the front of the car. > > They are on rear wings for stability. There’s low pressure area behind the wing so the air passing along the end plate. > > Instead, put dive planes to improve stability and reduce drag over the monster tires without increases drag at the very front of the car. +1 on not needing them on the front of this car. My take on this crap if it’s worth anything here. Dubbed spill plates for a reason, they regulate even airflow across the airfoils entire surface above and below without any flow disruption near the airfoils extremities(reducing flow roll off near the foils ends) and reduce foil drag. Low speed airfoil technology there. One of the factors in the downward extension of the plates is to dictate the airflow underneath the wing and regulate downforce. Proper airfoils do not create DF by just damming air on top of them but as an inverted wing which provides negative lift with low drag. By controlling the amount of airflow under the airfoil you can control the wings “lift ability”, just in an inverted state. The plates are also used in conjunction with the lower wing foil to aid air extraction from under the car(F1) and reduce drag at the tail from the converging flows 🙂 There’s alot of big time tech in F1 airfoil technology that’s WAY over my head to even bother understanding(like VG placement to direct core flow to other aero), but then again I’m a closed wheel, GE chassis aero guy 😉 Applying these to a home brewed flashing front splitter on a car is a little off kilt IMO**(nothing against your work Tom…LOVE the Grassroots/Racer Wholesale/Pegasus Racing look!!!)**. If his car was open wheel then I could maybe understand their use for directing airflow over the wheels to reduce frontal drag but again, this is elevated speed dependent… --- _[View the full topic](https://forums.speedlife.net/t/1stgens-scirocco/242194)._