Roof spoiler and extended boot lid questions

[Novaz_nz]

Looking good! I'm sure I'm behind you though. I have no data at all for the MPG of the car, and the wings were duct taped in place for the photo. I want to get hold of a non-spoilered boot lid to fix the wing to, as the current one has masses of holes and brackets for the factory spoiler.
Also, I will have to fill up, drive to an event, fill up again and check MPG, and then race. Can do the same on the drive home too.
I don't think taking the MPG from a day spent at full throttle would be that great!

[aerohead]

Originally Posted by Novaz_nz

Hi Metro,

I can trim down the supports to get the roof spoiler to follow and extend the roofline - would this help the airflow follow the window profile? I may as well make it as functional as possible before it gets fitted!

Novaz_nz, AMG Hammer,the performance tuner for Mercedes ran a spoiler combo as you have on your car.And as MetroMPG has mentioned,if you get your angles and curves correct,should show up favorably at the fuel pump.------------------------------ If you can locate" Metro's Permanent Kammback" thread,here at the aerodynamics forum,there is a "template"there that you could use to define the shape of your spoilers with a high degree of confidence for success.It's kind of a go-no-go for attached airflow.