Windtunnel results MK1 83' spoiler

[Unwishedmk1]

Hello,

Since July I am the proud owner of a Dutch MK1 83' and recently I have found something really interesting.
I got aerodynamic results of a Volkswagen MK1 with and without a zender spoiler (I believe Zender, I don't know for sure..)
Apart from the fact that this find is very interesting I am wondering if this is something common and possibly add value to the car?
The results and description are in German logically.

Looking forward to hear some expert advice 😉

Thanks in advance,
Joris Peters

[Tjaap]

http://www.volksforum.com/albums/files/7/G2Kamei.jpg

[Unwishedmk1]

So that is what it should've looked like.
But, I have a graph and table with the downforce results. So a before and after. Was this common to get with your Zender spoiler back in the day when they could be bought new?

[Oudelut]

It was included in the original package with mine. Was a Kamei-spoiler though. Maybe it was a 'Zeitgenossen'-thing?

[Unwishedmk1]

You are right, it is a Kamei spoiler. So this isn't any special? Too bad, I will keep it in that case.