Quote:
Originally Posted by CigaR007
I am fully aware that the visualization above is not the actual behaviour when the vehicle is in motion.
The physical orientation of the exhaust (slightly outwards in this case) is something that will probably require some tweaking as it does offset the actual airflow activity.
Anyhow, I am planning another tuft testing session with your proposed idea to try and increase the pressure at the inlet.
Regards
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It's great that you are doing stuff, but aiming a hair dryer at tufts on a stationary car tells you literally nothing at all, and using tufts to determine duct flow on a moving car only tells you if there is
any airflow through the duct - or not.
I think that there is probably little flow through your duct, and that could have been determined (basically before you even started doing all the work) by measuring the pressure difference between the surface of the bumper (where you are trying to pick up air) and the front inner edge of the wheel arch (where you are trying to expel air).
My viewing of factory car air curtain ducts (viewing only - I haven't measured the pressures) indicates to me that they want a lot of air flowing, which means a big pressure difference.
By measuring pressures you would be able to see exactly what is happening, and what modifications to the intake are achieving (or not achieving).