APR GTC-200 wing placement project on Shelby GT350

Project objective to increase APR GTC-200 effectiveness.

First, I will make new wing risers which shift the wing rearward by 5.5" and raise the height an additional 3" from the out of box location. Next, I will make new larger endplates.

The 5.5" back and 3" raise were arrived at from the suggestions in the module. Wanting to make larger endplates also came from suggestions in the module. As a result of the module, I will also be looking for a spoiler / Gurney flap for the boot to also work in conjunction with the changes.

My question on creating a larger endplate. Would there be any benefit to having the suction side of the endplate be long enough to come down to the level of the boot? Would this give any benefit from stronger tie in with the low-pressure area behind the car? Or do I stick with the roughly twice the length of the high-pressure side?

Thank you for your time.

Jerry

Hi there Jerry,

I think the rearwards and upwards move are a good strategy as a start for powering up the wing if you're planning on adding a bit of front aero to the car. As you're probably aware, the GTC-200 isn't the most powerful wing out there, but this should help a bit. Given the high amounts of rearwards curvature on the wing element I would say adding a bootlid spoiler is definitely a good idea!

Regarding your question - going very long with endplates is always a balancing act - if you go too low the suction on the wing will draw up on the boot, so while you will get better communication with the low pressure behind the car, you may not see a big increase in downforce, especially if you don't already have a decent diffuser setup. I think given the relatively small size of this wing element that extending all the way to the boot after that proposed move might be a bit too much? Hard to be certain without images of where everything would sit. I'd say stick with the twice the length of the high pressure side. If you go somewhere around 5" up, 10" down for the endplate as a maximum on that wing you should be in the ballpark.

Hope that helps!