ValidusVentus

So after doing some more research I do think a larger spoiler (rather than just a gurney flap) put at an angle would be of benefit to our car, especially if I cover some of the gaps in the underbody in front of the rear bumper. For the same reasons they are able to produce downforce on NASCARs they should work for our vehicle. For our car it should create a larger static high pressure area on top of the rear hatch as well as directing the airflow coming off the back of the car in a bit of an upwards direction, which due to newtons second law of motion will also produce some downforce. It also creates a more "intense" low pressure area behind the car -yes, adding drag- which helps to pull air more actively out from under the rear end, -this would be a huge benefit for anyone with a functional rear diffuser - reducing static pressure beneath the car (contributing to downforce). This low pressure area also acts on the underside of the spoiler. Seems like with the design of our rear hatch the boundary layer should be staying attached pretty well as it comes down from the roof and we should be getting pretty good airflow over the spoiler area.

Also looked into the effects of a front chin spoiler extension / air dam. It should create some front downforce (with a very slight increase in rear lift- but a net overal gain in DF) via creating a low pressure area directly behind it which acts on the underbody of the car. If I ever put a front splitter on the car it would increase the DF generated by the splitter as well (even higher pressure on top, even lower below it). It will also cut drag by reducing the flow of air over the relatively rough underbody. This lower pressure below the engine compartment also helps pull air through the radiator and out of the engine bay, as well as through the wheel wells. This should obviously help with engine cooling (which isnt really an issue for us) but the lower pressure in the wheel wells coupled with higher pressure seen by the front end could possibly help with pulling air though the brake ducting - which is an issue.

I didnt completely explain everything here, that would take a while and people can look it up in more detail. The trick will be finding a way to make a rear spoiler that doesnt look completely ugly lol. I prefer functional over form in most cases but I cant put sometihng on my car thats straight up unattractive.

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Mods: Dedicated caged track car, lots of things. ||| Valkyrie Autosport |||