Need opinions on a rear valence upgrade,

Vorsteiner


or

Rottec




The Rottec valence has a choice of matte or gloss finish carbon. Vorsteiner is more aggressive looking but is also a bit more pricy.

 

I like the ROTtech one better....

joel

 

Only thing I'm not sure about the Rottec design is the extra "lip" it has, looks like a carryover design from their 997.1 diffuser,

 

The Rottec doesn't seem to offer anything other than looks which is an individual thing. I don't care for either.

 

My choice would greatly depend on your other (if any) body panels/upgrades.

 

rottec, vorst too loud does not fit our pcars

 

My vote goes to Rottec too

 

The Vorsteiner looks like it hangs down too much, making the inside of the bumper act like a huge parachute trapping air that is trying to escape from underneath the car. It looks like it would have the *opposite* effect to what it is intended to achieve. The vertical fins on the back are merly cosmetic and have no aerodynamic benefit.

The Rottec looks like it is merely a horizontal cosmetic stick-on part.

I am not a big fan of these things, unless you are just looking to improve/change the appearance of the back end. In that case, it just depends on what you think looks better.

BUT, if you are looking for a diffuser to actually work, it would have to extend all the way underneath the car with a smooth plate to create a venturi effect. This would result in a high velocity low pressure region under the car creating down force and reducing drag at the back end. (Take a Look at the bottom of a Ferrari to see how the aerodynamics should be done if you want a functional diffuser).

 

its not a good body style for the finned diffuser

 

I kind of like that one:
http://www.championmotorsport.com/pr...-997-2-dfc.htm

Sorry for adding another option,

T.

 

I agee with the Champion being the best looking. it was also tested.

 

$3000? wow, that's it?

 

The price tag is what stopped me too...

I figured I could build a plant and make one out of unobtainium for that price...



T.

 

There is apparently a speedART diffuser http://www.fiercespeed.com/porsche/5...er-srs-ii.html which claims to improve aerodynamics and downforce.





Has anyone got one of these?

 

Thanks for the all feedback, I understand these are just cosmetic add-ons which is why I prefer to call it 'valence' instead of 'diffuser'.

At this stage I'm leaning towards the Rottec valence as it offers a cleaner look. But the speedart is also interesting, seems might be actually functiona?