Quote:
Originally Posted by jtbo
I tested also on dusty road, dust behaves differently, I would say dust is now lifted up, bit mixed, but it is not like before where dust did spread all over the road, it is more controlled if one can say so.
Also I did notice that rear window is not getting much of dust or water spray as I did notice when there was wet section of road, water spray is really great for carboard body parts 
Not very scientific, but I think they show that there was some change. |
Dust and rain are great real world indicators of air flow like smoke in a wind tunnel. It sounds like you have made a big reduction to the trailing vortex.
You may want to try adding streamers to visualize airflow over the surface of the car. Check before and after modifications. Unfold the passenger mirror, watch air flow on side of car, and fold it again to see what improvement was made.
I'm toying with the idea of rigging a video camera outside of vehicle to see how water mist acts around wheels and under the car. I drive a truck so the underside airflow is far worse than a car.
I'm also wondering about the best way to control airflow to radiator/intercooler but I'm more concerned for where the air goes after passing through as you are. I've read that with my truck the engine bay actually pressurizes with air to the point it restricts flow through the radiator so reducing air coming in will help in my case.
How much air is needed to keep engine bay cool?
Underhood temperatures are a bigger concern with a turbo. Exaust wrap is not cheap but not expensive either. That will go a long way to help with temperatures. It would be very difficult to install without removing the exaust first.
Everyone likes to see pictures. Please post some if you are able to.