Quote:
Originally Posted by kach22i
That's the perfect car to prove or disprove the principles I've discussed about a roof wing with vented and non-vented leading edge.
I say this because of the dirt roads you apparently drive on.
You most likely have a good idea how much dirt you have on your rear window normally, this can be used as a crude measurement of attached airflow, yes?
Now you have your partial Kammback or coroplast, and can observe dirt attachment.
Then you can move back or cut out an air-slot at the leading edge to see if you are getting some Venturi effect.
The dirt has a less chance of settling on surfaces with attached air-flow, yes?
I guess other methods are tufts or rolling down a hill tests, or even your gas gauge.
Tuft testing kammback spoiler and rear wheel skirts in a vw lupo 3l
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The cars currently in the shop for suspension work I don’t have the tools to accomplish... I don’t drive on dirt roads but my driveway is extremely muddy... so far as I’ve tested it I’m getting more drag now... angle might be a little off... when I get the car back I’ll adjust and try again