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Teardrop mirrors are vacuum formed over cnc milled tool. They will come on sale if they work in tuft testing. Realease date still unclear.
Same windscreen will still work.
If you start the boattail after the front doors the car will be about half meter longer to get the same results. In small car that is pretty big difference. You could leave the doors intact and just made the roof lower, but that aint easy task either. Also the frontal are will be the same.
My lupos frontal area have been 2.00 m2. I have lowered it with roof 0,0938m2. lowering the suspension 0,015m2 and with my future mirrors 0,0149m2 so total 0,1228m2 smaller frontal area. That means 6,1 % smaller total drag. The Cd value was 0.29 in Lupo 3L That will be around 0.2 at next summer so that is 31% smaller. So total drag Cd*A will be 0,375. Starting point was 0,58 so total drag is about 35% lower. So I will need about 35% less power (energy) to travel at 100 km/h speed. I would need also about 35% taller gear ratios to get the most of the aerodynamic mods but that aint gonna happen.
Remember also that car is also about 10% lighter and bearing frictions are also optimised, I can easily push the car with one finger.
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