Your CFD modeling of the interior is probably inadequate. CFD in general requires supercomputer levels of compute power. The modeling is not representative and the resolution is too coarse. Sorry.
You can click on your username, go to your profile and create an album to put you pictures in. then you can place them directly in the thread. You'll get more eyeballs on the problem.
You might CFD model the intake or exhaust port. Or you could observe best practices in the field. NACA ducts for intake, but they don't help on exhaust. Etc.
Were it I; the front wheelwells would follow this:
You already have a start with the open fender backs. Think about the relative volumes of the air swirling in the underbody, the amount needed for cabin ventilation and the amount needed for intercoolers on the apparently electric drivetrain.
Have you settled on a motor or would you like to hear an opinion on that?
If the exhaust vent is on the top of the canopy where high velocity air can pull it out, that could be a good location. You could probably have cabin air exhaust into the engine compartment. It may or may not require additional inlets.