Lip/Bumper = useable down-force?
 

So, which lip or bumper do you think would provide the most amount of useable down-force? If there are any hard facts of comparison please share! I am interested in getting a lip or bumper but i want to gain some down-force from it. Any inputs will help.:tiphat:

No and no. The Amuse makes... 200 (?) Lbs of downforce, but there is no real evidence. The Nismo kit makes 140 lbs, but not much info to support that besides Autech saying it does.

Best of luck figuring out which lip gives you better front end grip

Nismo s-tune kit front lip does..as well as sides and rear spats. Couldn't tell ya the amount, but can confirm that has proven downforce. What I love about them is they are oem nissan fit, templates included, painted to match and the best part they each have bolts and 3m for attachment points..so you can ensure they won't just fall off like other cheaper lips...

And you can feel that difference? Or you saw it said something like "added aerodynamics" in a Nissan book?

:bs:

sorry man but i dont think this is true.

Closest thing I found to adding downforce.

http://www.the370z.com/members-370z-...n-journal.html

i think eating more charburgers will give the car more down force than any little lip/splitter out there for street use.

unless going for the look, just keep the sport front end with the air deflector.

Drivermod FTL :ugh2:

:icon08:





:rofl2:

Anything that is angled up in the rear is going have down force, simple physics.
How much is measurable by the speed, angle of deflection and surface area.
You might be surprised at how much force there is at 70 miles per hour on a small area. Stick your hand out the window and play dolphin.

Been a while, but it isn't rocket science to figure out how much and at specified speeds.

He was talking about the front lip I thought? Justice, how much would the rear spats, which don't really look like they do anything help out? (No bs, honest question)

What is approximate angle and surface area. I can figure it out, but will have to wait till I get home.

we wernt talking about spoilers, just added on lip, side and spat pieces....

i play dolphin everyday! ......wait.... wtf is dolphin? hahaha

unless these add on lips extend under the vehicle i doubt they do much of anything.

Yeah don't even worry about front "downforce" with the stock or aftermarket cosmetic pieces. All that can really be said for those is that the stock sport front-spoiler skirt (and the Nismo setup) are "zero lift", so they at least block off upforce :)

To get real downforce, you really need a setup like mentioned in the earlier link to Megan's journal, where you build little frame rails that screw under the car where the undertray does and build a huge solid platform. I haven't heard of or seen any ready-made commercial options of that nature for our car (replacing the undertray basically), although they wouldn't be that hard to make, just no real market for it.

^agreed. Anything held on by tape is useless even the stillen splitter held on by tape. It has to be mounted to the frame or the trunk lid since it" pushes down on the frame. APR makes a universal splitter you just send them an outline of your bumper and they cut it out of CF. The nismo kit (not s-tune) is the only kit that was "wind tunnel tested". I am making my own rear diffuser and splitter and doing my own tests to see if it ACCTUALLY creates downforce if not then I will **** can it. I am a function over form kind of person though. My dream is to have an aero motions dynamic wing but I don't have that kind of scrilla hangin around.

Actually, in the rear I got a great idea from looking at one of the GT race-prepped 370's: they built a little rectangular frame from 1-inch square-tube aluminum. They cut holes in the trunk floor and the underside of the trunk lid, and their little frame sits between the car's lower subframe and the base of the wing. Basically the wing is bolted to the trunk lid (just to hold it there when the trunk lid is open), and then also bolted through to this frame when the lid is closed (you unbolt to open the rear). Sorry I don't know how to describe it better, wish I had taken pics of it. But the bottom line is: the aero force on the rear wing will push through this square tubing straight down onto the lower subframe stuff under the car, not onto the sheet metal or lid.

^I know exactly what you are talking about, i have seen it before but this is similar to what you are talking about.

*****************************************/ID/2571/PageID/4764/Team-America-World-Time-Attack--ARK-Designs-BNR32-Skyline-GT-R-Part-6.aspx

I think it all comes down to what type of wing you use and what application it is used for. If its for auto x and the wing will only produce 150lbs of DF at <60 mph then i woul say your fine with out an extra frame. But road race/ time attack with a wing making much more pounds of downforce then i would definately want the extra support to fully untilize that energy. There is also the option of doing the R's Tuning GTR type wing and have the mounts cut through the rear bumper. I thought about that option too, but i dont have the knowledge or resources and dont want to pay for such a custom spplication.

I was going to do something like that with the frame, but we figured a couple plates attached to the rear lid would spread the force out evenly enough. They are about 60 square inches each, so 120 total. even with 1200 pounds of force, it would only be 10 pounds per square inch.

btw, when I had the APR Wing that broke, using just its small mounting plates, it also cracked the skin of the rear hatch, another reason we did the plates.
http://imageshack.us/a/img853/3338/ndtu.jpg

its hard to see in this pic because the car is black, but the cracks are at the back end of these bases, going in towards the middle of the car about 3/4"
http://imageshack.us/a/img850/9260/imagenxr.jpg

Nismo S-Tune Aero Package Nissan 370Z 09+
Nismo, Nissan’s factory performance arm has released a group of factory tuned performance accessories for the 370Z to the motoring public in Japan. The 370Z package is an external aero appearance related piece, the Nismo 370Z S-Tune Aero Package includes a nose extension, front lip spoiler, side skirts, and rear spoiler as well as rear fender protectors. Also included in the package are Nismo badged floor mats.

The Nismo 370Z Aero Package was tested extensively in a wind tunnel and will eliminate lift and provide additional downforce over the 370Z’s already well developed stock sports aero package. The aftermarket will be hard pressed to beat the Nismo parts in performance and fit, after all what aero kit manufacture has access to a wind tunnel and the factory body panel surface data! The Nismo 370Z aero parts are available color matched from the factory to ensure quality installations with a near perfect color match.

Nismo S-Tune Bringing Showroom Upgrades to the 2009 Nissan 370Z
The Nismo S-Tune Aero Package focuses on aerodynamic and aesthetic mods, eliminating lift, increasing downforce and minimizing drag. It includes: - Nose Extension - Front Lip Spoiler - Side Skirts - Rear Spoiler - Rear diffuser - Nismo Floor Mats (score!) The Nismo S-Tune Performance Package is the one we’re interested in, bringing simple, effective modifications that should make the most of the 370Z’s performance: - Stainless Steel Performance Exhaust - 19” Forged Aluminum Nismo LMZ5 Wheels - Nismo S-Tune Springs and Dampers - Nismo S-Tune Brake Pads - Nismo Floor Mats (double score!)

Nismo S-Tune Aero Package Nissan 370Z 09+

I have tested my car at the track...I'm no race car driver but any additional downforce I'll take...Least I feel better at the track and know my lips not going to fall off.

The part to remember from that quote is: "is an external aero appearance related piece." I'm sure being a big mfg, they do have access to a wind tunnel, but I really doubt the S-tune bits add significant downforce, just looking at them. The "diffuser" in particular isn't really a diffuser, and the "downforce" part of their claims could easily be referring to just the rear spoiler, not the front end stuff.

the section you highlighted in red was not written by Nissan. even if it was it only says, "The Nismo 370Z Aero Package was tested extensively in a wind tunnel and..." that could also mean the Nismo kit that comes on the actual nismo.

im not trying to bust chops, hell i like the added on S-Tune stuff, but im hard pressed to believe it adds downforce. sorry :/


i just clicked your links.... you took that from a store ad. find me actual documentation from Nissan, Autech or Nismo.

Can anyone tell me the review this guys giving?:ughdance:
Hope this helps Fuct..

I get funny looks from others when I do this on occasion... :ugh:

Probably because they don't mean to do it like this...

http://weknowmemes.com/wp-content/up...whole-meme.jpg


:icon17:

Well the stock one didn't get any background music, and the S-tune got some kind of heavy metal -ish elevator music intro, so it must be more badass :)