[plucas]

Originally Posted by JDKane527

Curious in the cfd analysis, was the assumption made that the underbody of the car was flat or was the underbody modeled?

Originally Posted by eric6

Our model was built off of blueprints. The underbody of the car, which can be viewed up a few posts, is completely flat. I know this is stated in our "technical article," but I will state it again. This is comparing a relatively accurate model of the twins to that same model with a splitter, and then with a splitter and rear diffuser. Real world results will vary from the CFD analysis. What the analysis does do is give us a good indication of what is likely happening in real world scenarios (going down the hightway, drag strip, road course, etc.)

This is the best we can do at this time. We are looking into getting a portable scanner and at that time we may model the car's underbody more accurately, but that takes a lot of time and effort. In most cases this is considered accurate enough to properly see the benefit of the devices we have tested.

This. I do apply a surface roughness to the underbody however. This it improve the accuracy by mimicking the type flow under the car.