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Old 10-23-2009, 01:46 PM   #76 (permalink)
wagonman76
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Join Date: Jun 2008
Location: Northwest Lower Michigan
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Red Car - '89 Chevrolet Celebrity CL 4 door
Team Chevy
90 day: 36.47 mpg (US)

Winter Wagon - '89 Pontiac 6000 LE Wagon
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The simplest assumptions often seem the most clever ones. They are also usually wrong.
Yes I thought the same thing. Scale is the same. Small difference on a golf ball scales to small difference on car. Ratio of improved air flow to total air flow would likely be the same.

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Tire pressure didn't change, hence more rolling resistance. The car is definitely sitting lower with 800 pounds on it, hence less aero drag. But then again it's got a slightly larger frontal area. It's kind of surprising all of that evens out, but anyway.
And those cars are so lightly sprung too, at least the ones I've seen and ridden in. I bet it sat quite a bit lower with all that clay. Wonder about the tire pressure too. May have been more resistance at the start, but then again more sidewall flex means more heat which raises pressure and maybe compensated somewhat.

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I think there's a reason land speed record cars do not look like this.
That's for sure, they've got the freedom to make it however it will perform best, regardless of if anyone will buy it.

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They like A-B only testing do they. Even the beer-liquor test was done that way.
My first comment when watching the test was that they started with a cold engine for the mud test. Hard to say with the dimple test, but I bet it took a long time to apply all that clay (cold engine) and it didn't take that long to cut the dimples and test again (warm engine).

And Kari makes the show worth watching regardless of how bad they do testing. Baby or no baby she is fine
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