That’s not downforce, that’s drag.
thats what I just said
What he’s saying is that anything that creates downforce (or lift) is also going to create some drag. The hand out the window is a good example. Also look at racing, its always a delicate balance to get as much downforce as possible with as little drag as possible.
Back on topic, if you want to push your car to 150, do so in a controlled enviornment (track). Don’t do something like this anywhere there might be a chance of an innocent bystander getting in the way. There’s enough tragedy on the roads as is with people not able to controller their cars at normal speeds, don’t add to it.
no, you dont know what your talking about, the front body panels of a sho create downforce
the rear spoiler of a sho … that sho specific one, creates downforce … it was SPECIFICLY enginieered to do so via windtunnel testing
now if the front of the car has say, 50 mpounds of downforce,
and the spoiler creates say, 50 mpounds of downforce,
BUT the roof, due to its shape, creates 50 pounds of LIFT…
then you have 50 pounds of EFFECTIVE downfoce remaining
now if you create turbulance over the roof, you kill the lift created by the roof
you know how planes have a distance they have to trail the next jet ahead of them ? this is because the front planes TURBULANCE will destroy the trailing planes lift
create turbulance with a cars sunroof and you can kill the lift on the roof
now in our previous example about the sho …
50lb down on the front
50 lb down on the REAR
ZERO pounds UP on the roof
total effective downforce created by the car … 100 pounds ’
there you go
i know more about the sho
i obviously know more about aerodynamics
thank you, please come again
here’s just to give some of you guys an idea of how areodynamics work.
AND how much VW sucks 
Well… when you give us the graph for the original ‘box on wheels’ 
sigh Hotrodkid your “basics” are there, but you clearly have no applicable knowledge, im done trying to convince you otherwise.
Did a tire go down, or what?
i’m actually with MPD47… i kinda get what you mean creepy, but… no
<— works for boeing
Correct, front right tire went down.
both you you…SHHHHHHHHHHHHHHH… i am very stock thank you 
blow the welds off the intake… 
The Rally car gets every nut and bolt torqued on it almost every service, and gets gone through more thoughoutly between rallies. This is people lives you are messing with, anything can go wrong at 150 plus that can go wrong at any other speed, although the results will be 100% worse, your reaction times to anything are increased expotentially, and you are creating much worse stresses on your car. In other words, don’t be an idiot… save it for the track.
to the poeple that keep saying leave it on the track, though i agree it would be perfered but where can i got to top out my car? really becasue i have posted about this before and got no usefull information.
the 400 
honestly… its paved niceley and relatively straight… or 490 just after exit 47
is anyone else a little shocked that a VW hippie van has a coeffiecient of drag of .38??? i’d say that’s pretty damn good for a super tall flat faced brick…
here’s some food for thought a C5 z06 has a cd of .29 and that is stellar, lower than some of the high priced exotics.
as far as the sunroof thing is going, i understand the sho owners point of view he’s saying when you only lift the rear of the sun roof (“vent”) , creating a “mini wing” on the roof. but at the same time, i think that for any amount of downforce it could create, it would be negated by the extra drag, and as for being able to “feel” the downforce or the car squatting it could also just be the extra drag slowing you down and yes slightly pushing the car down at the same time.
Just a point to add to the sunroof thing you do realize they are talking about opening just rear portion, and not sliding it open. But wouldn’t something at an angle cause downforce?
Where opening it completely would just generate a ton of drag.
as far as the sunroof thing is going, i understand the sho owners point of view he’s saying when you only lift the rear of the sun roof (“vent”) , creating a “mini wing” on the roof.
that’s exactly what i said when i posted because i wasn’t sure everyone here knew what he meant. but yes, sunroofs that have a vent option simply lift the rear of the sunroof up at an angle some can go from like a few degrees to 45 degrees before sliding backward.
Regardless 150 is just a bad idea on a public road period. Granted there really is no place that you could do that legally but for good reason.
My car has a CD of .31, Is that good?