Use .46 for your Cd. Just remember one thing, the frontal area of the car has a much bigger effect vs the Cd number.
If you have two perfectly round objects: One the size of a golf ball and one the size of a basket ball, they both will have exactly the same Cd number. The Frontal Area will be much larger on the larger round ball. The smaller frontal area makes it possible for the "golf ball" sized round object to travel much farther than the "basket ball" sized round object.
Food for thought.
Tom Vaught
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"Engineers do stuff for reasons" Tom Vaught
Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward.
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