Lip/Bumper = useable down-force?

Bernard1414 · 12-29-2013, 03:37 AM

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.

DEpointfive0 · 12-29-2013, 04:12 AM

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

Shadezz · 12-29-2013, 10:40 AM

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...

DEpointfive0 · 12-29-2013, 10:46 AM

Quote:

Originally Posted by Shadezz

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?

fuct · 12-30-2013, 09:02 AM

Quote:

Originally Posted by Shadezz

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...

sorry man but i dont think this is true.

Mitco39 · 12-30-2013, 09:48 AM

Closest thing I found to adding downforce.

Megan Journal

kenchan · 12-30-2013, 10:19 AM

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.

XwChriswX · 12-30-2013, 10:29 AM

Quote:

Originally Posted by kenchan

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

kenchan · 12-30-2013, 10:52 AM

Quote:

Originally Posted by XwChriswX

Drivermod FTL

Justice97 · 12-30-2013, 11:00 AM

Quote:

Originally Posted by fuct

sorry man but i dont think this is true.

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.

XwChriswX · 12-30-2013, 11:06 AM

Quote:

Originally Posted by Shadezz

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...

Quote:

Originally Posted by fuct

sorry man but i dont think this is true.

Quote:

Originally Posted by Justice97

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)

Justice97 · 12-30-2013, 11:15 AM

Quote:

Originally Posted by XwChriswX

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.

fuct · 12-30-2013, 11:16 AM

Quote:

Originally Posted by Justice97

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.

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.

wstar · 12-30-2013, 12:37 PM

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.

Masterbeatty · 12-31-2013, 06:05 PM

^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.

12-29-2013, 03:37 AM	#1 (permalink)
Bernard1414 Base Member Join Date: Oct 2013 Location: New Jersey Posts: 22 Drives: 370z 40th anniv. Rep Power: 11	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.

12-29-2013, 04:12 AM	#2 (permalink)
DEpointfive0 Premium Member Bitches Join Date: Jan 2012 Location: SoCal Posts: 14,824 Drives: a lot Rep Power: 17151	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 __________________ Do YOU want to know what/where I got my username from? ( Click to show/hide ) NSFW due to language:

12-29-2013, 10:40 AM	#3 (permalink)
Shadezz Track Member Join Date: May 2012 Location: Colorado Age: 42 Posts: 896 Drives: 2012 Nissan 370Z Rep Power: 14	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... Bernard1414 likes this. __________________ 2012 370Z BLACK EDITION/ FLT BLK Rays / 5% 3M Tint / DW's / Z1 SS & 2 Piece Rotors Nismo S-Tune OEM / Beluga CBE & Y-PIPE / DDX370 / GTR Start .4 Fluid / NST Blue Kit

12-30-2013, 09:48 AM	#6 (permalink)
Mitco39 A True Z Fanatic Join Date: Aug 2012 Location: Edmonton Alberta Canada Posts: 2,089 Drives: 40th 370z Rep Power: 131	Closest thing I found to adding downforce. Megan Journal Megan370z and TheGreatOne like this. __________________ 2007 Chevy Duramax - EFILive Tuned By Me 2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her My Build --> http://www.the370z.com/members-370z-...39s-build.html

12-30-2013, 12:37 PM	#14 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3594	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. Megan370z and Bernard1414 like this. __________________ 7AT Track Car! Journal thread / Car setup details

12-30-2013, 10:19 AM	#7 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141520	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.

12-31-2013, 06:05 PM	#15 (permalink)
Masterbeatty A True Z Fanatic Join Date: May 2012 Location: Whales Vagina Posts: 4,586 Drives: the speed limit... Rep Power: 122866	^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. Bernard1414 likes this. __________________ 2011 MB 6MT Masterbeatty journal**

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