Go Back   EcoModder Forum > EcoModding > Aerodynamics
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 06-24-2009, 12:30 PM   #1 (permalink)
Master EcoModder
 
tasdrouille's Avatar
 
Join Date: Jan 2008
Location: Mirabel, QC
Posts: 1,672

The Guzzler - '08 Hyundai Elantra GL
90 day: 33.12 mpg (US)

Got Soul? - '11 Kia Soul 2U
Thanks: 35
Thanked 86 Times in 57 Posts
Datsun Z aeromods wind tunnel testing

Never seen this posted here. It's good stuff

Windtunnel Test Data - HybridZ

__________________



www.HyperKilometreur.com - Quand chaque goutte compte...
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 06-24-2009, 03:00 PM   #2 (permalink)
Master EcoModder
 
Join Date: Mar 2008
Location: USA
Posts: 568
Thanks: 1
Thanked 73 Times in 58 Posts
Am I reading the data incorrectly, or does it say those mods made very little difference?

I'd have thought the headlight covers, side skirts, windshield and hatch fairings, etc. would have done more to reduce drag.
  Reply With Quote
Old 06-24-2009, 04:39 PM   #3 (permalink)
EcoModding Lurker
 
Join Date: Apr 2008
Location: Regina, Saskatchewan
Posts: 73
Thanks: 0
Thanked 0 Times in 0 Posts
Those cars are fairly decent already for aero, but it in both cases, blocking off the openings at the front of the car made a significant improvement. ~10% reduction in required HP.
  Reply With Quote
Old 06-24-2009, 04:50 PM   #4 (permalink)
Master EcoModder
 
tasdrouille's Avatar
 
Join Date: Jan 2008
Location: Mirabel, QC
Posts: 1,672

The Guzzler - '08 Hyundai Elantra GL
90 day: 33.12 mpg (US)

Got Soul? - '11 Kia Soul 2U
Thanks: 35
Thanked 86 Times in 57 Posts
Well, there's a 13% difference in Cd from the stock car to the best iteration tested, but they kept adding, combining and removing stuff.
__________________



www.HyperKilometreur.com - Quand chaque goutte compte...
  Reply With Quote
Old 06-24-2009, 05:01 PM   #5 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,203

CM400E - '81 Honda CM400E
90 day: 51.49 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
Mitsubishi
90 day: 56.69 mpg (US)

Daox's Volt - '13 Chevrolet Volt
Thanks: 2,501
Thanked 2,587 Times in 1,554 Posts
Sorry, but I gotta comment. A stock Cd of .45 is not decent at all. Thats about as good as a truck. Just because it looks slippery doesn't mean it is.
__________________
Current project: A better alternator delete
  Reply With Quote
Old 06-24-2009, 05:34 PM   #6 (permalink)
EcoModding Lurker
 
Join Date: Apr 2008
Location: Regina, Saskatchewan
Posts: 73
Thanks: 0
Thanked 0 Times in 0 Posts
I mis-spoke(typed). You're right of course, I should have said CdA. The frontal area of those cars is absolutely tiny, and manages to compensate quite a bit for the efficiency of it all. If my math isn't too far off, it's about the same as the current VW Beetle.
  Reply With Quote
Old 06-24-2009, 05:34 PM   #7 (permalink)
EcoModding Apprentice
 
Join Date: Mar 2009
Location: Massachusetts
Posts: 216
Thanks: 0
Thanked 1 Time in 1 Post
They look fairly efficient, but I had a 240 and a 260Z and the aero was terrible. You could actually feel the wind resisting the car and they had all kinds of stability problems at speed. Much like a truck, actually. I find it interesting that the ducktail I had on the 260 decreased drag—I thought it just helped keep it from wandering so much. I'm also surprised the headlight covers didn't do more as much of the wind resistance and wandering seemed to come from that area. Never drove one with the covers, but I guess there's little difference according to the wind. The flared fenders actually decrease drag, which is amusing as the wheel wells were such an aero disaster that I guess just keeping some of the air out of there is worth the penalty in frontal area.
  Reply With Quote
Old 06-25-2009, 07:20 PM   #8 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 16,256
Thanks: 24,382
Thanked 7,359 Times in 4,759 Posts
Z-cars

CAR and DRIVER did some aero mods to a Z-car in 1974 after their success with the Pinto.They did not achieve as dramatic results as with the Pinto.A beautiful composite nose,with headlight covers was soon offered on the market.I'll post the article next Saturday.
  Reply With Quote
Old 06-25-2009, 07:31 PM   #9 (permalink)
Master EcoModder
 
bondo's Avatar
 
Join Date: Jan 2008
Location: Arkansas
Posts: 279
Thanks: 90
Thanked 240 Times in 90 Posts
Looks like they are in the A2 Wind Tunnel

That is the A2 windtunnel in Mooresville, North Carolina. Great bunch of folks there.

Somebody dropped a bunch of money running that many tests on different configurations for the Datsun Z.

Bondo
  Reply With Quote
Old 06-27-2009, 04:52 PM   #10 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 16,256
Thanks: 24,382
Thanked 7,359 Times in 4,759 Posts
z-mods

Al Glidewell is pretty swamped with work and I don't think he'll be able to do the scans.------------ Here's a synopsis of the C and D 240-Z mods: for best economy,a rear spoiler of aluminum sheet,about 8-inches ( 200mm ) angled up at 30-degrees gave best MPG for downforce ( 110-lbs ) and 0.20 mpg.------------ The front air dam allowed 3.6-inches of ground clearance,hung basically straight down,canceled 85-pounds of lift and added 0.8mpg at 70mph.-------- The G-Nose,offered on Nissan's 240ZG,with grille block.added length,and covered headlights allowed a 1.2mpg improvement at 70.top speed 5-mph higher and 95-pound lift reduction.Headlight covers by themselves were good for 0.2 mpg.Total for C and D mods: 1.2 mpg @ 70-mpg,from 22 mpg,to around 23.5.

  Reply With Quote
Reply  Post New Thread




Similar Threads
Thread Thread Starter Forum Replies Last Post
DIY full size wind tunnel tasdrouille Aerodynamics 32 06-06-2011 04:31 AM
Homemade wind tunnel? justpassntime Aerodynamics 17 06-05-2011 04:17 PM
tuft testing, vortex generators, and God's own wind tunnel jim-frank Aerodynamics 10 06-27-2009 03:48 PM
Rain and snow - ad hoc wind tunnel testing? bwilson4web Aerodynamics 1 03-15-2009 04:32 PM
Virtual Wind Tunnel rockorager Aerodynamics 1 06-03-2008 06:34 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com