My G35 sedan has the aero kit with the rear spoiler and under body air diffuser, but I am not sure if they actually provide any meaningful down force. Does anyone know the answer?

 

i am not sure I thought that it was just for looks

 

arent the spoilers and diffusers suppose to provide "zero lift" or something?

thats what was advertised for my 06 coupe..

 

i believe it lowers your drag coefficient by .01 and provides zero lift

 

what redlude97 said.....

 

yeah what they said

 

It's doubtful you'll ever be driving fast enough to actually produce a significant amount of downforce. We don't drive F1 Racecars here... unless you're an F1 Racecar driver So with that being said... i wouldn't worry about it. Body kits you see on the market nowadays are purely cosmetic.

 

whaaaaat? i thought the holes in the greddy skirts were more aerodynamic!

 

^^^ LOL! If you wanna get technical.... those holes are there to cool the brakes... because of all that HARD BRAKING that we do while making right handers at the intersection

 

The sedan has a very low coefficient of drag, even lower than the coupe!

.27 (.26 with the factory rear spoiler) vs .29 for the coupe AND the NEW sedan.

That's got to be one of the lowest c/d ratings I have heard of.

 

I've read that, but at legal speeds, I doubt anyone could notice any diff.
To my mind the rear wing is more aesthetic than anything else.

It's more likely that any kind of underbody kit addition will help with engine, transmission, and brake cooling than anything else.
JMHO.

C.

 

yeah... with driving legal speeds we will never see the downforce.

 

Well, when driving at high way speed, if I put my hand out of the window to catch the wind, I could sense quite a bit of drag. And since my hand has pretty small surface area compared to the rear spoiler, I guess the total force could be quite a bit.

Just my 2c.

 

Where is the underbody diffuser at? I dont have the aero kit, but am interested in what it looks like and where it is!

-sean

 

you'd be surprised to find that our g sedans' drag coefficient, as tall as they are, are lower than a c6 z06 corvette....if only we have stock turbos or bigger motors pushing out 500+hp and lighter weight we'd be in supercar territory and would definitely require the needed downforce of a rear spoiler wing like that of the r34 gtr's....