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Old 11-22-2014, 04:02 AM   #1 (permalink)
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Does a Kamback help on an insight?

I have enough election signs to do a Kamback for the insight, would it help or hurt mpg? I don't want to waste my time cutting/measuring/mounting for less than a 5% impact.

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Old 11-22-2014, 05:52 AM   #2 (permalink)
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http://ecomodder.com/forum/showthrea...uft-25223.html
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Old 11-22-2014, 08:09 AM   #3 (permalink)
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Originally Posted by 2000mc View Post
I'm not going full boat tail yet. That is really, really far off in the future.
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Old 11-22-2014, 09:53 AM   #4 (permalink)
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Balto, the lines on the Insight are pretty good as-is. I don't know how effective a Kammback would be.

Only a handful of production cars have ever had a drag coefficient lower than the Gen-1 Insight:

0.25 Honda Insight 1999-2006
0.2455 Tatra 77 1933
0.24 Mercedes-Benz S-Class 2014–Present
0.24 Mercedes-Benz C-Class 2014–Present
0.24 Tesla Model S 2012
0.22 Mercedes-Benz CLA Blue Efficiency Edition 2013-Present
0.212 Tatra T77A 1935
0.195 General Motors EV1 1996
0.189 Volkswagen XL1 2013

I might do a grill block and some under-body panels on Turtle, but mostly I'm trying to improve my driving techniques
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Old 11-22-2014, 10:08 AM   #5 (permalink)
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Quote:
Originally Posted by cowmeat View Post
Balto, the lines on the Insight are pretty good as-is. I don't know how effective a Kammback would be.

Only a handful of production cars have ever had a drag coefficient lower than the Gen-1 Insight:

0.25 Honda Insight 1999-2006
0.2455 Tatra 77 1933
0.24 Mercedes-Benz S-Class 2014–Present
0.24 Mercedes-Benz C-Class 2014–Present
0.24 Tesla Model S 2012
0.22 Mercedes-Benz CLA Blue Efficiency Edition 2013-Present
0.212 Tatra T77A 1935
0.195 General Motors EV1 1996
0.189 Volkswagen XL1 2013

I might do a grill block and some under-body panels on Turtle, but mostly I'm trying to improve my driving techniques
Yea I'm trying to learn driving techniques as well, but I'm going to have to somewhat relearn once I get proper tires, because it will take less throttle to accelerate, and maintain speed, so yea.
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Old 11-22-2014, 10:27 AM   #6 (permalink)
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Extending the tail a bit would help. I suspect adding some sharp lines to the back to help with clean air separation might be worth something, which extending the tail would also do. My only concern would be visibility, which is already fairly poor in our car.



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Old 11-22-2014, 03:38 PM   #7 (permalink)
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1st-gen Insight

Your Insights roofline is right at the ragged edge of attachment

Not as bad as the 1st-gen CRX,which I tried to correct




You can see how Honda lofted the roofline of their 2nd-gen CRX,netting Cd 0.29.


With the flow attached all the way to the rear,adding the elongation brings the wake area down and base pressure up for an overall drag reduction,as you see the the Mrecedes-Benz C-111 III

Theoretically,your drag potential would just be a function of the amount of elongation.
An idealized aft-body would allow the bodies drag to approach the drag of half-bodies,and with wheels faired,perhaps Cd 0.12,maybe a tad lower

The drag trend would follow as in this table for a streamlined half-body with wheels in ground proximity

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Last edited by aerohead; 11-22-2014 at 03:47 PM.. Reason: add 2nd CRX-2
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