Watching NHRA qualifying on ESPN2 tonight. One of the funny cars had the left side header break off during the run. The downward thrust from the open exhaust ports was enough to lift the car off the ground! They showed the high speed-high definition footage and you could see that the frame of the car was bowing upward as the engine pushed it up.
It's been discussed on more than one occasion how much benefit one can get from proper exhaust placement, and I thought that this was pretty interesting. I know that no one is going to be running a top fuel spec engine in LSR to make the kind of thrust that they make, but a lot of folks run pretty healthy stuff and to me this seems like proof that there are gains to be had from exhaust flow.
I thought it was interesting anyway. Not that my little 250 Triumph could ever show anything from it, LOL.