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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 10-04-2008, 03:00 PM   #1 (permalink)
Old Retired R&D Dude
 
Join Date: May 2008
Location: Woburn Mass USA
Posts: 702

Little Red - '12 Toyota Prius c 2 Two
90 day: 57.82 mpg (US)

"Whitey" Bulger - '14 Toyota RAV4 LE
Thanks: 10
Thanked 18 Times in 17 Posts
giant turbulator tape?

Actually, it's just a strip of coroplas with a saw tooth cut..


And I'm testing some spay-on glue to see if it will hold coroplas on the skid plate.



Since this is not adding frontal area, I hope it's not going to add any drag.

If it generates a wide band of vortexes under the engine openings, it might cause some effect. Maybe I'll see a coolant temperature change.?.
Maybe the noise level will drop?

When VTs were added under the nose of a Honda Insight, it made the car more stable at highway speeds.

Got a little road trip this afternoon..

__________________
Cheers,
Rich

Current ride: 2014 RAV4 LE AWD (24 MPG)

Wife's Pizza Transporter
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 10-04-2008, 04:28 PM   #2 (permalink)
X-Frenchy: very
 
groar's Avatar
 
Join Date: Jun 2008
Location: Toulouse, France
Posts: 595

scenic - '01 renault scenic
90 day: 43.09 mpg (US)

megane - '97 renault megane classic
Diesel
90 day: 72.53 mpg (US)

dennisius - '06 Toyota Prius
Team Toyota
90 day: 69.27 mpg (US)
Thanks: 9
Thanked 34 Times in 23 Posts
Quote:
Originally Posted by Xringer View Post
Actually, it's just a strip of coroplas with a saw tooth cut..
Giant cars need giant solutions

Quote:
When VTs were added under the nose of a Honda Insight, it made the car more stable at highway speeds.
Is it this article : Blowing the Vortex, Part 4 (part "Front Undertray") ?

Quote:
Got a little road trip this afternoon..
My ears are ready to ear you...
I looked at thick tape this afternoon, but couldn't find some

Denis.
__________________
Save money & CO2 at home : http://ecorenovator.org/
Created and managed by the creators of http://ecomodder.com/
---
Earth and health are priceless, so are kilotank and AT-PZEV
Best Mégane tank: 1268.9mi @ 77.847 MPG(US)
2008/06-2011/10 saving:
  • 5725.5 kg CO2 (5342.6+382.9)
  • Diesel / Money: 42.17% = 2446.25€ = 3357.26$


---
megane : thread - kill switch.
  Reply With Quote
Old 10-04-2008, 05:26 PM   #3 (permalink)
EcoModding Lurker
 
Join Date: Aug 2008
Location: Olympia, wa
Posts: 96

Red Beast - '82 Honda V45 Sabre Vetter Fairing
90 day: 39.38 mpg (US)

The Wife's bike - '82 Honda CM450E Red
90 day: 57.22 mpg (US)

Yellow Submarine - '04 Dodge Neon SXT
90 day: 28.71 mpg (US)
Thanks: 6
Thanked 1 Time in 1 Post
It looks good, and may easily hidden with a different color choice. I was thinking along the same line for the the fairing on my motorcycle.
__________________
  Reply With Quote
Old 10-05-2008, 10:26 AM   #4 (permalink)
Old Retired R&D Dude
 
Join Date: May 2008
Location: Woburn Mass USA
Posts: 702

Little Red - '12 Toyota Prius c 2 Two
90 day: 57.82 mpg (US)

"Whitey" Bulger - '14 Toyota RAV4 LE
Thanks: 10
Thanked 18 Times in 17 Posts
Quote:
Originally Posted by groar View Post
Giant cars need giant solutions



Is it this article : Blowing the Vortex, Part 4 (part "Front Undertray") ?



My ears are ready to ear you...
I looked at thick tape this afternoon, but couldn't find some

Denis.
Yeah, a CRV is bigger than you might think. (Heavy too).
Yes, that's the article.
"Four AirTab vortex generators were placed at the leading edge of the undertray.

Immediately noticeable was improved aerodynamic stability. The Insight is not an aerodynamically stable car at speed – it is discombobulated by, especially, the bow waves of trucks. This can be felt when slowly passing a truck heading in the same direction on a multi-lane road. As the Honda draws adjacent to the front of the truck, the very light car is pushed away from the truck. (This affect, once recognised, can be felt to a degree in lots of cars – but it’s quite clear in the Honda.) With the undertray vortex generators in place, the affect of the truck bow waves was diminished. The bow wave affect could still be felt, but it needed less steering correction.

OK, so the car was experiencing better stability, probably through reduced frontal lift. But would there be a trade-off in extra drag, resulting in increased fuel consumption? The answer to that is – no!

With the undertray vortex generators in place, the fuel consumption averaged 2.9 litres/100. In fact, on one trip the car equalled its best-ever consumption at 2.8 litres/100km – however, the traffic flow that day was particularly kind and so I don’t think that the vortex generators can be said to have helped in achieving this. But they certainly weren’t harming fuel consumption..."


I did 30 highway miles last night. On the way to Quincy, most of the trip was stop and go. Average speed was about 8 MPH until we got past the broken down car on the side of the road. (All 4 million cars that went by had to stop and look)!

But, we drove back home in the 58 MPH range on the way back and the glue held very well.
I was trying not to get us killed by all the Saturday night drivers going
70 to 90, so I didn't take any time to notice the effects of the mods.
Didn't even think about looking at the SC2 until I got home.
Maybe old folks should just stay at home on Saturday nite!
__________________
Cheers,
Rich

Current ride: 2014 RAV4 LE AWD (24 MPG)

Wife's Pizza Transporter
  Reply With Quote
Old 10-11-2008, 07:15 PM   #5 (permalink)
Old Retired R&D Dude
 
Join Date: May 2008
Location: Woburn Mass USA
Posts: 702

Little Red - '12 Toyota Prius c 2 Two
90 day: 57.82 mpg (US)

"Whitey" Bulger - '14 Toyota RAV4 LE
Thanks: 10
Thanked 18 Times in 17 Posts
The coolant temperature seems to running a little lower than normal.
But I'm pretty sure that has to do with the cooler weather we are having in Mass.

Made a short trip to Home Depot (Gorilla tape) on Rt-95 and noticed my MPG weren't
all that great either. So, it might have to do with the cooler weather.
I'm pretty sure my Jumbo Orange ZZ strip isn't hurting my MPG..

I hope to be doing a doing a 200 mile round trip next Sunday on the Mass Pike.
I plan on passing some trucks (if I can find some slow ones) to see if the
stability/handling feels any different as I drive into truck-wakes..

Since my CRV front end isn't really that light, I'm not likely to see
"improved aerodynamic stability". But, you never know until you try.

Got the Gorilla tape today and hope to add some normal size ZZ tape to the mirrors next week.
__________________
Cheers,
Rich

Current ride: 2014 RAV4 LE AWD (24 MPG)

Wife's Pizza Transporter

Last edited by Xringer; 10-11-2008 at 10:33 PM.. Reason: adding text
  Reply With Quote
Old 08-20-2009, 10:59 AM   #6 (permalink)
16 Ferret Circus
 
bnmorgan's Avatar
 
Join Date: May 2009
Location: Ecru, Mississippi
Posts: 95

GrumblyDavidson - '00 Harley Davidson Road King FLHRP-I
90 day: 38.37 mpg (US)

Golf - '04 Volkswagen Golf GL-TDI
90 day: 38.29 mpg (US)
Thanks: 11
Thanked 7 Times in 6 Posts
Any chance to repost those pictures? I'm looking at somethign similar for the GoKart along the hood front and roof at the break line above windshield.
  Reply With Quote
Old 08-20-2009, 11:46 AM   #7 (permalink)
Old Retired R&D Dude
 
Join Date: May 2008
Location: Woburn Mass USA
Posts: 702

Little Red - '12 Toyota Prius c 2 Two
90 day: 57.82 mpg (US)

"Whitey" Bulger - '14 Toyota RAV4 LE
Thanks: 10
Thanked 18 Times in 17 Posts
Quote:
Originally Posted by bnmorgan View Post
Any chance to repost those pictures? I'm looking at somethign similar for the GoKart along the hood front and roof at the break line above windshield.
Since I've replaced my old CRV, I'm slowly getting rid of all the old pics..
I have way too many on my PC too.




I'm not sure that this 'mod' did anything. Maybe if the coroplas was a bit thicker.?.
Theoretically, (at least in my mind) it should have had some effect..
But, that effect might be very hard to detect.
__________________
Cheers,
Rich

Current ride: 2014 RAV4 LE AWD (24 MPG)

Wife's Pizza Transporter
  Reply With Quote
Old 08-20-2009, 12:08 PM   #8 (permalink)
16 Ferret Circus
 
bnmorgan's Avatar
 
Join Date: May 2009
Location: Ecru, Mississippi
Posts: 95

GrumblyDavidson - '00 Harley Davidson Road King FLHRP-I
90 day: 38.37 mpg (US)

Golf - '04 Volkswagen Golf GL-TDI
90 day: 38.29 mpg (US)
Thanks: 11
Thanked 7 Times in 6 Posts
I'm not convinced it's gonna help me at all. biggest thing i need is some way to reduce or fill the drag bubble behind the gokart. Flow sims that i have available both show a big clunk of dead air being hauled along. Trouble is the calculation time between each thing I try is tough.

  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
My kingdom for a giant, heated workspace MetroMPG The Lounge 14 12-12-2010 09:08 AM



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