Easiest Areo Mods to do that ..

[320touring]

Dont considerably alter the look of the car?

A difficult one..

I'm interested in improving the aero of all my cars, but any overt mods will draw attention from all and sundry...

so I'm looking for " stealth" aero mods...

Let me know what you think..

I can see that a bellypan would work

[piers.singer]

Depending on your car (and your skill), you may or may not be able to incoporate upper and lower grille blocks without substantially altering the look of your car. Judging by your garage entries, I'd say that the Avensis and BMW don't have recessed grilles and so you could make a simple mod that way, if you created grille blocks of a similar colour to how they should appear otherwise. On the Clio this could be trickier as the upper grille is essentially a large panel gap between the bonnet and the bumper. Still, if you filled the space with some dark material, it could still be adequately inconspicuous on the move.

What I have also seen done is grille blocks being placed behind the original grille. This is a bit of a compromise from an aero perspective, but it should still raise engine bay temperatures for better efficiency and is practically un-noticeable.

[jtbo]

Originally Posted by 320touring

Dont considerably alter the look of the car?

A difficult one..

I'm interested in improving the aero of all my cars, but any overt mods will draw attention from all and sundry...

so I'm looking for " stealth" aero mods...

Let me know what you think..

I can see that a bellypan would work

Grille block should be doable, you can make it from transparent material too.

Bellypan of course, but it is not very easy to attach without ruining the car in process, means lot of new holes.

Filling gaps of bonnet etc. then painting filler with non glossy black does not change appearance a lot, but it requires lot of work and gain is not too great.

Moving antenna or removing is also small gain, but is not very clear to general public that there has been some change.

Those mods that make some difference and does not change looks are only few, best gain seem to be at the rear and not much possible without changing looks of car.

[euromodder]

Deflectors right in front of the wheels ?

They will hardly be notable as you need to cover the inside corner of the wheel well anyway (given the diagonal flow underneath a car).


Air dam ?
Paint it black, no-one will notice.

[SwamiSalami]

remove side mirrors. i could almost guarantee no one would notice AND you'll definitely notice the mpg boost. (anybody know what % boost mirror delete provides?)

This is definitely one of the more significant aerodynamic mods.

Good luck!

[SwamiSalami]

p.s. I know that sounds crazy, but seriously...do it.

[euromodder]

Originally Posted by dieselbeetle

(anybody know what % boost mirror delete provides?)

2.5% on average.

Side mirrors - EcoModder

[SwamiSalami]

nice

[Exalta-STA]

Here's some pics of the aerodynamic modifications of my friends B13 Sentra

-lowered suspension
-blocked off grille
-aerodynamic bumper (from a GTS Sentra)
-flat black air dam/chin below the bumper
-side skirt
-ultra light weight wheels
-light weight fiber hood



older pic


i like how he did it because it made the car look sportier

[Exalta-STA]

For your BMW, You could try this out..looks good too