Quote:
Originally Posted by aerohead
While the Mazda is lighter and smaller,the Pontiac had a lower Cd.The CdAs of the two cars might be closer than you think.
The weight difference won't mean anything on the open road.
If you're going for HWY mpg you're gonna have to do something to the back of the RX-7.It's contour is too aggressive and prone to attached longitudinal vortices.
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Agreed, good dialog like yours is appreciated, and cD isn't difficult to improve, as my S-10 has proved to me. Much the same way the 5"-tall rear spoiler actually helps the '70-'81 Camaro / Firebird, even though it adds downforce, and the 2" rear spoiler on the '82-'92 Camaro is nothing but drag reduction, functionally (style is a matter of opinion) there are similar examples of spoilers reducing drag on late model cars ranging from Tauruses to Porsches.
So here I'm attaching an image that shows the rear spoiler I'm hunting for.
Even so, The plan is baseline the car, then try the airdam, then remove the airdam and try the spoiler, then try both together.
I'm not finding much for side skirts, but undercar airflow looks like something I might help with a belly tray.
I don't believe the Pontiac is all that good, it is the worst MPG in its class, even with its so-called ecotec engine, which may be a moniker getting slapped on several different families of 4 cylinders, and that pic looks nothing like wind tunnel test results I've found for similar cars.