So I bought some Vortex Generators made by airtabs. I'm not exactly sure how far back I should install them on the roof. I had planned to put them all the way back but the roof starts to slope down.
Anyone tried using VGs on the E30 roof?
edit: Heres some pics from earlier that I just placed on the roof
Not actually going to install these for a little while since a rear wing would be a good idea to add with it. I've got plans but for now I'm still learning the ideal location. I'm pretty sure I bought enough of these little guys but who knows.
I knew I wouldn't be able to go all the way to the rear window so I need to see if that's a problem, but I hope more reading will give me the answer.
For now, here's some pics since that's what we all want to see
At the edge...
![](https://uploads.tapatalk-cdn.com/20170124/707134b3348b63f5b193b18827d69c68.jpg)
Where it's flat:
![](https://uploads.tapatalk-cdn.com/20170124/66c8b311ff9aa2fedce386a841fe72e4.jpg)
Probably how they will get mounted, with a little more precise measurements:
![](https://uploads.tapatalk-cdn.com/20170124/8cfcfcdd28fdabac5348e6bc59599f04.jpg)
Another option:
![](https://uploads.tapatalk-cdn.com/20170124/227875e7091bd02ca84b77fa9a23508e.jpg)
From the front
![](https://uploads.tapatalk-cdn.com/20170124/9da5c89e8df9ae324faccb3939df6b99.jpg)
The second option leaves enough space between the outer ones that I can add more airtabs if I need it, but from an article I read, this many is about where any more and it doesnt really make a difference...
Anyone tried using VGs on the E30 roof?
edit: Heres some pics from earlier that I just placed on the roof
Not actually going to install these for a little while since a rear wing would be a good idea to add with it. I've got plans but for now I'm still learning the ideal location. I'm pretty sure I bought enough of these little guys but who knows.
I knew I wouldn't be able to go all the way to the rear window so I need to see if that's a problem, but I hope more reading will give me the answer.
For now, here's some pics since that's what we all want to see
At the edge...
![](https://uploads.tapatalk-cdn.com/20170124/707134b3348b63f5b193b18827d69c68.jpg)
Where it's flat:
![](https://uploads.tapatalk-cdn.com/20170124/66c8b311ff9aa2fedce386a841fe72e4.jpg)
Probably how they will get mounted, with a little more precise measurements:
![](https://uploads.tapatalk-cdn.com/20170124/8cfcfcdd28fdabac5348e6bc59599f04.jpg)
Another option:
![](https://uploads.tapatalk-cdn.com/20170124/227875e7091bd02ca84b77fa9a23508e.jpg)
From the front
![](https://uploads.tapatalk-cdn.com/20170124/9da5c89e8df9ae324faccb3939df6b99.jpg)
The second option leaves enough space between the outer ones that I can add more airtabs if I need it, but from an article I read, this many is about where any more and it doesnt really make a difference...
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