imolazhp
Posts: 244
Joined: Sat Mar 28, 2015 8:02 pm

Re: Improve aerodynamics for better mpK

Thu Dec 21, 2017 10:56 am

Lower and add rear wheel skirts, might not be pretty (the wheel skirts) but would help with drag.

ecoangel
Posts: 203
Joined: Sat Sep 07, 2013 2:50 am
Contact: Website

Re: Improve aerodynamics for better mpK

Tue Jan 02, 2018 6:08 am

It was built to a price. CdA is actually no better than a 1990s Toyota Camry.

Lowering any car reduces effective frontal area no matter how badly designed the undertray is.

For down-force without a drag penalty then yes a flat bottom with proper diffuser is the way forward for race cars.
http://www.fuelly.com/driver/ecoangel/a2
http://www.fuelly.com/driver/ecoangel/a3

ecoangel
Posts: 203
Joined: Sat Sep 07, 2013 2:50 am
Contact: Website

Re: Improve aerodynamics for better mpK

Tue Jan 02, 2018 6:10 am

Nice pics Art,

Any more developments?
http://www.fuelly.com/driver/ecoangel/a2
http://www.fuelly.com/driver/ecoangel/a3

electronchaser
Posts: 79
Joined: Fri Nov 08, 2019 3:14 pm

Re: Improve aerodynamics for better mpK

Fri Nov 08, 2019 3:19 pm

ecoangel wrote:
Tue Jan 02, 2018 6:08 am
It was built to a price. CdA is actually no better than a 1990s Toyota Camry.

Lowering any car reduces effective frontal area no matter how badly designed the undertray is.

For down-force without a drag penalty then yes a flat bottom with proper diffuser is the way forward for race cars.
Hi ecoangel, sorry for bringing up an older thread, but I've been thinking about lowering the car on a new set of sports springs, which give about a 2cm drop up front. How much would a 20mm lowering reduce the frontal area, and thus drag. ( have one of the redesigned i3's with the new front end, 120ah ).

Many Thanks!
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Bertone
Posts: 22
Joined: Wed Jan 22, 2020 9:37 am
Location: Madrid, Spain

Re: Improve aerodynamics for better mpK

Wed Jan 22, 2020 12:43 pm

Re-opening this topic...

I believe the front of the i3 could have been made more aerodynamic by the BMW engineers.

If you look at the area between the front headlights and "kidneys", it is not a very smooth surface...in fact air will flow between the headlight and kidney and be trapped under the frunk area producing drag.

Perhaps those "holes" could be "filled" with, for instance, polystyrene to form a smooth surface. Also the kidneys can be made more smooth "filling them up"..

The difficulty is to make a perfect fit...but polystyrene is a light and easy-to-work with-material so perhaps it is doable.

What do you think? Just a crazy idea....??
2017 94Ah

Boxbrownie
Posts: 87
Joined: Sat Sep 06, 2014 10:21 am
Location: Pastyland, UK

Re: Improve aerodynamics for better mpK

Sun Jan 26, 2020 12:57 pm

Bertone wrote:
Wed Jan 22, 2020 12:43 pm
Re-opening this topic...

I believe the front of the i3 could have been made more aerodynamic by the BMW engineers.

If you look at the area between the front headlights and "kidneys", it is not a very smooth surface...in fact air will flow between the headlight and kidney and be trapped under the frunk area producing drag.

Perhaps those "holes" could be "filled" with, for instance, polystyrene to form a smooth surface. Also the kidneys can be made more smooth "filling them up"..

The difficulty is to make a perfect fit...but polystyrene is a light and easy-to-work with-material so perhaps it is doable.

What do you think? Just a crazy idea....??
Don’t forget to tape over all the shut lines also :lol:
Best regards........David

If anything in my post offends you please let me know, I may wish to offend you again. ;)

eNate
Posts: 506
Joined: Mon Sep 09, 2019 5:33 pm

Re: Improve aerodynamics for better mpK

Sun Jan 26, 2020 6:55 pm

Bertone wrote:
Wed Jan 22, 2020 12:43 pm

I believe the front of the i3 could have been made more aerodynamic by the BMW engineers.

...

What do you think? Just a crazy idea....??

Careful there, or we'll be all driving Honda Insight look-alikes! :D
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alohart
Posts: 2169
Joined: Sat Nov 01, 2014 7:36 pm
Location: Honolulu, HI

Re: Improve aerodynamics for better mpK

Mon Jan 27, 2020 2:39 pm

eNate wrote:
Sun Jan 26, 2020 6:55 pm
Careful there, or we'll be all driving Honda Insight look-alikes! :D
Having owned a 2000 Honda Insight for 15 wonderful years, I resemble that comment :lol:
Aloha,
Art

2014 BMW i3 Arravani Grey, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, JuiceBox EVSE

robthebold
Posts: 110
Joined: Sat May 11, 2019 5:09 pm

Re: Improve aerodynamics for better mpK

Tue Jan 28, 2020 9:44 am

Boxbrownie wrote:
Sun Jan 26, 2020 12:57 pm
Bertone wrote:
Wed Jan 22, 2020 12:43 pm
Re-opening this topic...

I believe the front of the i3 could have been made more aerodynamic by the BMW engineers.

If you look at the area between the front headlights and "kidneys", it is not a very smooth surface...in fact air will flow between the headlight and kidney and be trapped under the frunk area producing drag.

Perhaps those "holes" could be "filled" with, for instance, polystyrene to form a smooth surface. Also the kidneys can be made more smooth "filling them up"..

The difficulty is to make a perfect fit...but polystyrene is a light and easy-to-work with-material so perhaps it is doable.

What do you think? Just a crazy idea....??
Don’t forget to tape over all the shut lines also :lol:
I think caulk would be even better, combined with taking a green sharpie to the edges of the windows.

PVEVman
Posts: 4
Joined: Fri Jan 31, 2020 4:27 pm

Re: Improve aerodynamics for better mpK

Fri Jan 31, 2020 9:00 pm

Just rip off the side mirrors and use cameras. Put the screens in the corners of your dashboard and you should have better rear view vision too, without dead zones!

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