14 degrees, I would have thought you'd want to keep that as close to 0 as possible. It seems as though 14 degrees would create an area of high pressure and slow the flow of air (the exact opposite of what you want to do under the car).

Anyhow, I don't think it would be that big of a deal, just would thought since you're fabb'ing it up you would have gone that route.

BTW, BEAUTIFUL build man. Best of luck.

 

Sick build

 

By pointing the splitter up you create a high pressure "plow" on the bottom side up front which creates a low pressure zone there after under the car. If you look at most GT2 cars they will have an upward slant on the diffusor with side diffusors to direct air. This is kinda the same idea as having a radiator duct that has a smaller inlet than outlet. By jamming air at a certain point, you can create a low pressure from there after.

 

Ehh... not sure I agree with ya there. Although its still better than stock, the whole idea of a splitter is to limit the amount of air underneth the car. That's why the lower the better (to a degree the suspension isn't limited) is widely accepted. By lifting the front you are effectively allowing more air under the car. This in itself is a problem. The next problem arises when you have to evacuate the air as quickly and efficently as possible. By creating an area of high pressure under the car (slowing down the flow) you are correct in saying it will return to a lower pressure afterwards because that is the nature of flow dynamics but the idea is not to slow the air down anywhere under the car because that creates lift (high pressure under the car and relative low pressure on top). I'd like to hear more about the principles or source you got the AOA from. Maybe I'm missing a principle at play. But truly, I can't see that great of an effect one way or the other so it is really moot but I'd still like to know the source and understand the principle behind that concept.

 

For me, my source was "Race Car Vehicle Dynamics" and you can find it here http://www.amazon.com/Race-Car-Vehicle-Dynamics-R146/dp/1560915269

I tried to search and find you a free source but unfortunately this is the only thing I could find. http://en.wikipedia.org/wiki/Diffuser_(automotive)

I have also found a nice description for a front splitter “A Front Wind Splitter is a protruding flat surface in the front of a car that is designed to decrease front end lift and exert downforce. By creating a high pressure area on top of the wind splitter, high pressure air flow is restricted to flow underneath a car. With low pressure below the car, the effect of lift is reduced and a driver can gain from the extra traction and control” http://www.aprperformance.com/index....d=76&Itemid=49

Please also check this site, it has some very good information
http://racecaraerodynamics.com/

 

Porsche CGT underbody.

As you can see it uses the same principal of diffusing the air in the rear

 

^OMFG!

 

the principal behind such an underpanel is called venturi effect. You should create an aera of high air velocity and because of that degreasing air pressure which sucks the car to the ground. To get the pressure conditions right you have to build a diffuser at the rear to slow down the exiting air so it matches the speed of the entering air.

 

Thank you I could not have said it any better

 

I tried to explain it as easy as possible. I´m actually doing my own underpanel in carbonfibre and i can tell you it is very hard to fabricate an underpanel for the 350. You have to flow enough air through the underpanel for cooling exhaust and diff so they wont get hurt. Additionaly i´m placing some service "doors" into it so i don´t have to take it off when doing oil change and stuff like that. looking forward to your final products!

 

^ Maybe start a thread and post progress pics? I'd be interested in seeing how you're going about doing it.

 

I´ll think about doing a thread but i actually plan on selling those parts in cooperation with an 24h race team so i can´t really show single steps. Most of the parts will be designed via cad and an flow simulation. There is a lot of engineering to do it right the first time.

 

^ Good luck man

Tips and hints are welcomed

 

basic knowledge of aerodynamics helps a lot. any aircraft engineer could help you. We usually build something that generates lift but we also know something about downforce

 

The dashboard

I don't need a lot of dashboard space since I'm going to use the MoTeC SDL dash which will be mounted to the steering column and I will have two switchs.

 

wow, amazing

 

Sick! keep it up......

 

kittens are dying across the world... sub'd

 

in for the results

 

Update:

- We just finished the brake lines and clutch line, and as you can see its much shorter than stock and inside the car. I just need to buy some AN -4 supply hoses.

- The Hyd. hand brake has the pressure sensor in it, which will be used for the rear brake light

- We are also finishing the wing mount, which as you can see is way back then the normal install and about the same hight. I'm using the OEM traction arms to mount the wing. Installing the wing this way reduces the turbulence behind the car

- We also finished routing the radiator hoses. The only thing that worked was Gates flex hoses, no pics for now but I will get some tomorrow.

-We also finished the fuel filler hole and fuel cell vent.

- Still waiting on the rear section of the under panels.