Quote:
Originally Posted by Phase
Yeah but that was back in the day. My wheel skirts bulge out a little but they reduce drag because they keep air flow attached and increase pressure in the wake. Smooth air flow is going to have lower drag than hitting a whole turbulent wheel well and detaching. So idk why they are saying that.
And now I’m confused about the diffuser part and it seems expensive now to try and do real testing to see if drag is reduced or not. Cardboard isn’t going to hold up for a coast down or throttle stop test at super high speeds. And i don’t think pressure gauges would show if drag is reduced and fuel economy is improved.
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Their diffuser lowered drag by as much as 2.5%.
If their baseline was Cd 0.32, then the 'lower than 8-degree' diffuser was good for as low as Cd 0.312.
