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Old 04-30-2009, 12:55 PM   #1 (permalink)
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Using vortex generators on my car?

Hello all,

I've got a Vauxhall Astra ECO4. The Astra is a common as muck car in the UK, but the ECO4 is a rare factory modified Astra to improve areodynamics. Basically, Vauxhall stuck on underbody panels, spoiler, thin high pressure tyres and a very low ratio gearbox. As the spoiler is only found on the ECO4 - the standard Astra spoiler is very different, I can believe that it improves areodynamics, so would using vortex generators to improve flow towards the spoiler help?

Here's a couple images of the back of my Astra, and here's an image of the standard spoiler on someone else's Astra.

Thanks very much for your time in advance!

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Old 04-30-2009, 02:11 PM   #2 (permalink)
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The value of vortex generators at all is in debate, I think, but I'll let someone else chime in on this one.
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Old 04-30-2009, 03:12 PM   #3 (permalink)
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Eddles -

I have airtabs (see here), but I can't prove that they help.

Mine are designed for the end of truck trailers, i.e. boxy-ended shapes.
My advice is that if you have a boxy car like a Honda Element or a Jeep, they could help :



If you search this site, you will be able to find lots of "DIY" vortex generators that will keep your wallet plump and happy.

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Old 04-30-2009, 04:34 PM   #4 (permalink)
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Quote:
Originally Posted by cfg83 View Post
My advice is that if you have a boxy car like a Honda Element or a Jeep, they could help
Whereas my experience with boxy vehicles and a sedan is they made no measurable difference - http://ecomodder.com/forum/showthrea...fect-6381.html and http://ecomodder.com/forum/showthrea...olla-2390.html

(Although that's with AirTabs, not delta style VG's)

I get the impression that VG's are seen by many as a magic bullet. They're not.

Recall that even in a scientifically optimised deployment of delta wing style VG's, Mitsubishi's results were a reduction in the coefficient of drag of just -0.006 .
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Old 04-30-2009, 05:31 PM   #5 (permalink)
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MetroMPG -

Yeah, here's another way to quote myself :

Quote:
My advice is that if you have a boxy car like a Honda Element or a Jeep, they *might* help
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Last edited by cfg83; 04-30-2009 at 06:56 PM..
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Old 04-30-2009, 06:09 PM   #6 (permalink)
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Hi,

I found that AirTabs added drag to my Scion xA, and I got slightly worse mileage when they were on the car.

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