Improving 2008 Focus Sedan Aerodynamics - Page 2 - Focus Fanatics
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace


Go Back   Focus Fanatics > Ford Focus Second Generation > MK2 Focus

MK2 Focus The place to chat about general questions, window tinting, exterior body, interior and lighting upgrades for the second generation 2008-2011 Focus.

Search This Forum | Image Search | Advanced Search    
Ford Focus Tire & Wheels FocusFanatics Merchandise

Reply
 
Thread Tools Display Modes
Old 10-01-2012, 09:01 AM   #11
mac.mogul
Focus Fanatic
 
mac.mogul's Avatar
 
Join Date: Oct 2011
Fan#: 90409
Location: Wichita, KS
What I Drive: 2011 Sterling Grey SES Sedan

Posts: 3,665
FF Reputation: 13 mac.mogul Great Standing Member
Buy-Sell-Trade Rating: (0)
-Find some 15" steelies and put low rolling resistance tires on them, have your alignment set as close to "0" as possible
-check out the 3dcarbon front lip air dam.
-A belly pan is not recommended unless you are able to design and test it in a wind tunnel... You can make your car dangerous with poorly designed aero.
-Vortex Generators won't do anything on our cars because there's very little low-pressure air coming off of the roof unless you've got a roof spoiler.
-Don't worry about the decklid spoiler. It is just for looks and doesn't have any real effect on aerodynamics.
-If you have access to it, try using ethanol free gasoline. I saw a huge bump in MPG when I switched.
-Lower suspension will decrease the amount of low-pressure air under the car, but if you don't have the proper hardware to correct alignment, you won't realize any gasoline savings.

With cold air you'll need a tune to get the most efficient engine operation possible. I'm not sure that your gasoline savings will translate to the amount of money you'll need to spend on hardware and tuning.

Good choice on the spark plugs though. I also use the AR103's and they are definitely a fuel saver.
__________________
2011 SES 5spd #006 >> SR #213

What other people think of me is none of my business.
mac.mogul is offline  
    Reply With Quote
Sponsored Links
Advertisement
 
Old 10-01-2012, 12:34 PM   #12
5characters
No Mo Fo Fo
 
5characters's Avatar
 
Join Date: Sep 2010
Fan#: 78897
Location: Pickerington, OH
What I Drive: 2012 M2 Touring

Posts: 3,243
FF Reputation: 2 5characters Good Standing Member
Buy-Sell-Trade Rating: (0)
slow down


and here is a little bit more on the VG

http://www.mitsubishi-motors.com/cor...004/16E_03.pdf

http://www.focusfanatics.com/forum/showthread.php?t=270062
__________________
Just bring me coffee!
5characters is offline  
    Reply With Quote
Old 10-01-2012, 04:10 PM   #13
emsvitil
Focus Addict
 
Join Date: Sep 2007
Fan#: 50210
Location: SoCal, CA
What I Drive: 2000 SE Wagon

Posts: 1,202
FF Reputation: 9 emsvitil Good Standing Member
Buy-Sell-Trade Rating: (0)
http://autospeed.com/cms/title_Modif...5/article.html

http://autospeed.com/cms/title_Modif...6/article.html
__________________
Ed
emsvitil is offline  
    Reply With Quote
Old 10-01-2012, 06:37 PM   #14
Montag
Focus Enthusiast
 
Montag's Avatar
 
Join Date: Jan 2011
Fan#: 81977
Location: Knoxville, TN
What I Drive: 1997 Olds Cutlass Supreme

Posts: 197
FF Reputation: 3 Montag Good Standing Member
Buy-Sell-Trade Rating: (0)
two words: BOAT TAIL





__________________
1997 Oldsmobile Cutlass Supreme SL. 3100 v-6. Auto. 4-door. Green.
2004 Chevrolet Silverado. 5.3 v-8. Auto. 4wd. Long bed. White.
Montag is offline  
    Reply With Quote
Old 10-01-2012, 06:43 PM   #15
StockTalon
Guest
 
Join Date: Feb 2012
Fan#: 94771
Location: Troy, MI
What I Drive: 2012 Focus Titanium

Posts: 1,854
FF Reputation: 1 StockTalon Good Standing Member
Buy-Sell-Trade Rating: (0)
Reduce the frontal area, run smaller mirrors, leave the windows and sunroof closed, make fender skirts, etc.

Also, lower the car as much as possible and run a lip spoiler.
StockTalon is offline  
    Reply With Quote
Old 10-02-2012, 08:19 PM   #16
mixadj
Focus Rookie
 
mixadj's Avatar
 
Join Date: Jun 2012
Fan#: 100022
Location: Charlotte, NC
What I Drive: 2008 Ford SES AT

Posts: 14
FF Reputation: 1 mixadj Good Standing Member
Buy-Sell-Trade Rating: (0)
Sorry I haven't been back to this thread lately, I have midterms this week. I have a feeling I am going to have to do some more research on this subject. I might look into building a quick release boat-tail for when I go down the highway. I do have a frontal belly pan but I think it ends right before the transaxle. I was looking at some release notes for the MK II body and it said the mirrors were already designed to be low drag. I will have to look at dropping the vehicle though I do like my current ride height. I will also look into front wheel deflectors and extending the belly pan. Thank you for everyone who chimed in, I will have some reading material for the weekend with all those links. I am actually surprised aerodynamics for the focus has not been threaded before. Maybe it has but just not for the American MK II. I need to go make a friend at the Motorsports lab on campus....
mixadj is offline  
    Reply With Quote
Old 10-02-2012, 08:37 PM   #17
StockTalon
Guest
 
Join Date: Feb 2012
Fan#: 94771
Location: Troy, MI
What I Drive: 2012 Focus Titanium

Posts: 1,854
FF Reputation: 1 StockTalon Good Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by mixadj View Post
Sorry I haven't been back to this thread lately, I have midterms this week. I have a feeling I am going to have to do some more research on this subject. I might look into building a quick release boat-tail for when I go down the highway. I do have a frontal belly pan but I think it ends right before the transaxle. I was looking at some release notes for the MK II body and it said the mirrors were already designed to be low drag. I will have to look at dropping the vehicle though I do like my current ride height. I will also look into front wheel deflectors and extending the belly pan. Thank you for everyone who chimed in, I will have some reading material for the weekend with all those links. I am actually surprised aerodynamics for the focus has not been threaded before. Maybe it has but just not for the American MK II. I need to go make a friend at the Motorsports lab on campus....
I doubt this will be possible but, see if you can get a hold of Andrew Brilliant. He is very good at areo work. His main outlook on the whole concept is downforce but, I'm sure you can learn how things work from what he has to say. Either from, posts, articles or, if you can get a hold of him, what he can teach you.
StockTalon is offline  
    Reply With Quote
Old 10-02-2012, 09:30 PM   #18
crice8
Focus Fanatic
 
crice8's Avatar
 
Join Date: Apr 2011
Fan#: 84830
Location: tyler, TX
What I Drive: 2010 Sterling Gray Focus SE Sedan

Posts: 3,383
FF Reputation: 9 crice8 Good Standing Member
Buy-Sell-Trade Rating: (13)
EcoModder.com
This is where I learned alot on this matter.
I suggest lowering it, 3dcarbon front lip, Lighter flatter wheels with high rolling tires...
But the most effective change would be driving habits. You would yield much better mpgs simply by cutting back 6mph to where the car shifts up but at the lowest rpms..
__________________
Galatians 6:14
crice8 is offline  
    Reply With Quote
Old 10-10-2012, 08:24 AM   #19
Gettysburg150
Focus Addict
 
Gettysburg150's Avatar
 
Join Date: Apr 2012
Fan#: 97408
Location: Gburg, PA
What I Drive: 08 Silverfrost Metallic SE, 5 speed

Posts: 651
FF Reputation: 2 Gettysburg150 Good Standing Member
Buy-Sell-Trade Rating: (0)
Slow down. I average 40+ mpg when I drive at 55 mph and shift at 2000rpm. On a recent trip to Jersey, round trip 420 miles, I averaged 37 mpg at an average speed of 75mph. My mods are FRPP suspension (springs/struts/shocks) and wider 205/60r15 Michelin MXV4 tires set to 37 psi
__________________

Sedan Revolution Two Three Zero
FRPP, "Stealth" CAI, Debadged, wider tires, louder stereo, turbo mainfold in the wrong place...
Gettysburg150 is offline  
    Reply With Quote
Old 10-10-2012, 02:17 PM   #20
emsvitil
Focus Addict
 
Join Date: Sep 2007
Fan#: 50210
Location: SoCal, CA
What I Drive: 2000 SE Wagon

Posts: 1,202
FF Reputation: 9 emsvitil Good Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by Gettysburg150 View Post
Slow down. I average 40+ mpg when I drive at 55 mph and shift at 2000rpm. On a recent trip to Jersey, round trip 420 miles, I averaged 37 mpg at an average speed of 75mph. My mods are FRPP suspension (springs/struts/shocks) and wider 205/60r15 Michelin MXV4 tires set to 37 psi

Ok...

420 miles / 75 mph = 5.6 hours
420 miles / 55 mph = 7.64 hours

420 miles / 37 mpg = 11.35 gallons
420 miles / 45 mpg = 9.33 gallons


So can either save 2 hours of travel time or 2 gallons of gas.

At $4 per gallon, the 2 hours costs you $8........

How much is 2 hours of your time worth?
__________________
Ed
emsvitil is offline  
    Reply With Quote
Reply

Bookmarks & Social Networks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 02:25 AM.


Copyright 2002-2014 FocusFanatics.com. All Rights Reserved : Terms of Use : Privacy Policy : Advertise Information : Site Map

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Acura TLX or Fiesta ST. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area.