Spoiler & Scoop
 

Anyone know when (what speed) the spoiler (on trunk lid) and front scoop (underneath front lip) begin to have any serious effect on holding the road? Just wondering how important they are.

The front lip on mine holds the road pretty good every time I pull out of my in-laws driveway.

Around 70+ mph.... but that was a general figure I heard. I'm sure each spoiler/splitter works slightly different due to how they are designed.

Hahaha I believe he means performance, not actually holding on the ground.

:bowrofl:

OP: I've read much higher speeds, above 100mph+. I could be wrong though.

Seriously doubt you are getting much performance/handling from either at any speed but that is just my opinion...

Read the last sentence, second paragraph.

2009 Nissan NISMO 370Z - Short Take Road Test - Car Reviews - Car and Driver

What do you drive?

A Sport Model 370Z has what is called "Zero Lift" Aerodynamics with the Spoiler and the small Wing on the trunk lid. This means they keep the car from trying to "float" at high speeds. Nissan does not define the exact speed at which these come into effect.

A NISMO model370Z has what Nissan terms "Negative Lift" aerodynamic package. At the Higher speeds, that Nissan does not define either, the aerodynamics package with the active front spoiler and the larger wing on the trunk lid actually start pushing down on the car (downforce) to keep it firmly planted on the road. By how much, Nissan does not publish these numbers either - at least no where that I have seen.

Hope this helps.

EDIT: The link in the above post to mine steers one to a Car & Driver article in which Nissan DID define these numbers. Apparently, 75mph and 18 Lbs of Downforce on a NISMO Model, QUOTE: " but Nissan claims all the body modifications create no additional drag and generate 18 pounds of downforce over the front axle and 35 pounds over the rear at 75 mph"

Funny you should ask. The dealer I bought my car from never installed the front air deflectors. They left all three in the hatch. Now at 6k mi. I had the new dealership I deal with install them at the last oil change. I immediately felt a difference on the highway. It's hard to explain, maybe more smooth since less air goes under the car.

I'm driving a Touring Coupe/Sports. I did note the link talking about the Nizmo, and the 18 lbs of downforce at 75 MPH. But my Touring Coupe spoiler is probably really minimal in its effect (my guess at this point).

I'd like to just remove the spoiler and the front deflectors (or whatever they are that hits driveways) and just didn't want to create a destabilizing situation of any consequence. On one hand I'll hardly drive at speeds where I suspect they have an effect - depending on what effect there is to begin with - and on the other hand I did get in the 100 MPH range driving it home from out of state after the purchase (you can do that and still stay under the 4000 RPM break-in limit with no trouble at all). But I probably won't be driving in that speed range in the future; it was mostly a "try it out a little" thing.

And if they don't even go into effect until around 100 MPH - or if the stuff I have is mostly cosmetic or mild enought that it makes little real difference - then I probably would be happy just removing them. (I know there are those who would never take off the rear spoiler on a "looks" basis but for me I'd actually prefer not having it.)

So if I can determine no ill effects, or neglible effects in the 100 MPH or less range, that's what I'm trying to figure out

or maybe they just inflated the tires to the correct psi and you're feeling that...(?)

im pretty sure if you remove the sport spoiler there will be holes in the trunk you need to fill.

As I stated before, this is not cosmetic. The aerodynamic package on the touring model keeps the car from "lifting" due to air flow under the carriage. Nissan calls this "ZERO LIFT", so the car would not float at high speed and lose traction with the road. DO NOT take those spoilers off for your safety (and those driving around you) at high speed.

Honestly I feel the same thing. My boy that has one without the spoiler drove mine and said something similar to what you just said as well.
I actually feel like there's something pushing down on the back of my Z with the spoiler.

been there down that.........:rofl2::rofl2: