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Originally Posted by aerohead
suspect,the turbulators were intended for a notchback type car with a backlight angle so steep as to produce immediate flow separation at the header and no chance for re-attachment on the boot/trunklid rear.
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Weren't they intended for trucks with a big squared off rear face ?
There's be no re-attachment their either.
Going by their website, the airtabs are supposed to create a virtual tail.
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The upshot for you,is that your car has the beginnings of a really good Breer/Fachsenfeld/Kamm roofline.If you were to just extend what you have using the Aerodynamic Streamlining Template as a guide you can enjoy some real savings at the pump.
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At least the boattail and extended Kamm-backs are proven mods.
So far , no-one here has been able to proof Airtabs / VGs reduce the fuel consumption.