[aerohead]

Originally Posted by Sven7

1987 GM Sunraycer by Tyler Linner, on Flickr


Oldsmobile Aerotech by Tyler Linner, on Flickr


1988 Pontiac Banshee Concept by Tyler Linner, on Flickr

Notice that these all have smooth, rounded noses.

I taped the gaps on the Probe for awhile and found no noticeable improvement. However if the nose were reworked I'm sure it could do better. It's just that the time/money would be better spent making a full, smooth belly pan.

there's no doubt that the nose helped on Sunraycer,although it was a consequence of shrink-wrapping the occupant while integrating into the solar array.Sunraycer would be nothing without its tail.
On the AEROTECH,I have no Cd for the short -tail depicted,although a member posted Cd 0.19 for the Long-tail version.No better than Mercedes Boxfish,although great compared with the Cd 0.57 March INDYCAR hidden under the body (downforce really kills you at the pump).
As to The Banshee,I've never seen drag data published for that car so we learn nothing from GM on that one.