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Old 05-04-2020, 01:22 AM   #28 (permalink)
Cyborg ECU
California98Civic's Avatar
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 5,764

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,147
Thanked 1,852 Times in 1,262 Posts
Originally Posted by JulianEdgar View Post
No it is definitely NOT an ad hominem argument; it is a simple statement of fact. You are talking about something you've not done, so you have no direct experience in how repeatable it is, how the results correlate to changes, etc.
You seem to think I am arguing it is not a good method because I am pointing out how variables still apply. I've already told you I like what you've done here, and I plan to try it. But whether I have or do has no bearing on the relevance of variables, and anyone who wants to try what you are suggesting should think about them.

Originally Posted by JulianEdgar View Post
I just did a good throttle-stop testing session. Ideal conditions - 13 degrees C, no wind, 30 per cent throttle. To give some idea of the consistency that is achievable, I did three tests of the car in its standard configuration (ie with undertrays and rear wing). One at the beginning, one at the middle and one at the end of the 40 minute test session. The results (km/h) were:
  • 103
  • 104
  • 104

I am therefore using an average of 103.5 km/h as the reference.

Results of testing were:
  • No rear spats - 104
  • Vertical front winglets 40mm gap - 103.5
  • Vertical front winglets 20mm gap - 105
  • Edgarwit front air curtains 40mm gap - 106
  • Edgarwit front air curtains 20mm gap - 107.5
  • Rear vertical spoiler lip 35mm - 102.5
  • Windows open - 101
Sounds great. I'm reticent to ask you any question, though, or try to discuss any of this, because you seem to get defensive. You seem uninterested in conversation. So good luck. I'll be curious what you come up with.

See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.

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