What’s with the rear spoiler?

[1970]

I like the shape of the spoiler, but like kern said its too short, should come out to almost the ends of the qtrs, and the mountings should be farther apart, l always thought someone took the spoiler off of a E Body and put it on

 

[GTXDAN]

Here's a car with a spoiler.

Here's a car with a wing.
I think it looks better with black wheels

 

[j-c-c-62]

Since this topic continues, and as already noted a true and efficient wing requires adequate airflow especially on the low-pressure side. This being the lower wings surface on a car seeking downforce. Most of the benefit of a wing occurs on this side. Mounting close to other surfaces or in turbulent air a wings efficiency/DF is greatly reduced and approaches just becoming just added drag. Mounting a wing close to another surface helps impart an unintentional uplift force on that surface, almost negating the whole DF goal of installing a wing in the first place. This is the core design flaw with the common pictured wing here. Ideally it should be mounted high enough to be in clean air, it should be as wide as the car (ie wider than the green house), if allowable be mounted rear of any decklid surface, it should be of proper profile and mounting and be 3D if height is restricted in order to best account for different airflow paths around the roofline across the width of the car..