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BabyDiesel · 05-30-2015, 11:15 AM

I know graphs do not help you much Cd, but it is all I can do for the time being

Here is a comparison of coast-down speeds with my current 0.269/0.01 combo versus 0.33/0.012. The numbers are a stock Zx2's Cd and a hypothetical increase in RR due to placecard air pressure.

The pink line is the hypothetical coast-down during a duration of testing a stock ZX2 in the same conditions as the original test. The dots are the data points for my coast-down test where I came up with Cd= 0.269, Crr= 0.01

Note the incredibly high Sum of Error^2. This shows the amount of deviation from my data points and it is quite a lot!

05-30-2015, 11:15 AM	#22 (permalink)
BabyDiesel Lean Burn Cruiser! Join Date: Dec 2012 Location: Johnston County, NC Posts: 936 Big Blazin' - '88 Chevrolet K5 Blazer Silverado SUV 90 day: 14.97 mpg (US) Chili - '00 Honda Insight Gen-1 Insights Team Honda House of Tudor Team Streamliner 90 day: 72.29 mpg (US) Thanks: 840 Thanked 491 Times in 310 Posts	I know graphs do not help you much Cd, but it is all I can do for the time being Here is a comparison of coast-down speeds with my current 0.269/0.01 combo versus 0.33/0.012. The numbers are a stock Zx2's Cd and a hypothetical increase in RR due to placecard air pressure. The pink line is the hypothetical coast-down during a duration of testing a stock ZX2 in the same conditions as the original test. The dots are the data points for my coast-down test where I came up with Cd= 0.269, Crr= 0.01 Note the incredibly high Sum of Error^2. This shows the amount of deviation from my data points and it is quite a lot! __________________ Remember, thank a fellow EM'er for a helpful post!!! I hypermile better in my cowboy boots Past threads: ZX2 modding thread Ecomodder's Top 10: How they do it! ZX2 Aerodynamics: Shooting for 0.15 Cd ZX2 coast-down testing for Cd & Crr