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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-20-2013, 01:55 PM   #11 (permalink)
Diesel FTW
 
PAFirefighter11's Avatar
 
Join Date: Apr 2013
Location: Flourtown, PA | Bethany, DE
Posts: 91

Golf TDI - '03 Volskwagen Golf TDI GL
90 day: 44.63 mpg (US)
Thanks: 3
Thanked 12 Times in 8 Posts
Thanks a bunch! The mud flaps should be removed, correct?


Also, is there a proven MPG increase from damming up the open grille areas up front?


I know it's ugly but I got a great deal on it!

__________________
-Rick R
-'03 Volkswagen Golf TDI (49.9 MPG - Stock with Eco Friendly Tires
-'98 Jeep Grand Cherokee 5.9L - 32" MTZ's, 4.5" lift (11.5 MPG)
-'98 Pontiac Firebird Trans Am WS7 5.7L (22 MPG)
-'01 Pontiac Firebird Trans Am WS6 5.7L (22 MPG)
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 11-20-2013, 02:28 PM   #12 (permalink)
NightKnight
 
NachtRitter's Avatar
 
Join Date: Dec 2008
Location: Placerville, CA
Posts: 1,594

RippinRoo - '05 Subaru Legacy Wagon 2.5 GT
Subaru
90 day: 21.16 mpg (US)

Helga - '00 Volkswagen Jetta TDI
TEAM VW AUDI Group
Diesel
90 day: 53.91 mpg (US)

Olga - '03 Volkswagen Jetta Wagon
90 day: 46.24 mpg (US)
Thanks: 303
Thanked 311 Times in 186 Posts
Looks like a great little car!

Yes, removing the mudflaps and blocking as much of the grill as feasible will both help aero and (therefore) FE.
  Reply With Quote
The Following User Says Thank You to NachtRitter For This Useful Post:
PAFirefighter11 (11-22-2013)
Old 11-20-2013, 07:22 PM   #13 (permalink)
Hydrogen > EV
 
Join Date: Apr 2012
Location: NW Ohio, United States
Posts: 2,017

Snow White and the 6.2 Dwarfs - '11 Chevrolet Corvette LT2
Last 3: 26.46 mpg (US)

Silver Flea - '05 Honda Insight
90 day: 58.96 mpg (US)
Thanks: 981
Thanked 383 Times in 279 Posts
One point on the grille block-

There is a bit of controversy on why the grille block works. Yes, aero should help, but one thing that can't be argued is the temperature increase. Operating around peak engine temperature is more efficient than cold- in this weather, that faster warm up time and ease of keeping a warmer temperature will definitely help- just monitor your engine temps, even more so as the weather (eventually) gets warmer.
__________________





Best Tanks:
Mustang - 54.83 mpg (US) at the Green Grand Prix
Insight - 82.91966 mpg (US) over 818.5 miles.
  Reply With Quote
The Following User Says Thank You to UltArc For This Useful Post:
PAFirefighter11 (11-22-2013)
Old 11-21-2013, 05:09 PM   #14 (permalink)
.........................
 
darcane's Avatar
 
Join Date: Aug 2009
Location: Buckley, WA
Posts: 1,586

Ninja 650R - '06 Kawasaki Ninja 650R
90 day: 52.02 mpg (US)

B*tch - '01 Honda Civic HX
Team Honda
90 day: 38.09 mpg (US)

Ms. Hyde - '06 Cadillac CTS V
Sports Cars
90 day: 16.93 mpg (US)
Thanks: 375
Thanked 480 Times in 311 Posts
Quote:
Originally Posted by PAFirefighter11 View Post
I took care of the fart pipe tip for now:
Any change in volume because of that?

On my '01 Civic, the muffler fell completely off due to rust. With no muffler at all, it is quieter than the ricer Civics with fart cans. I have to assume that the typical fart can actually amplifies the exhaust note.
__________________
2001 Civic HX Mods


Past Cars:
CTS-V

2003 Silverado Mods
  Reply With Quote
Old 11-21-2013, 05:24 PM   #15 (permalink)
.........................
 
darcane's Avatar
 
Join Date: Aug 2009
Location: Buckley, WA
Posts: 1,586

Ninja 650R - '06 Kawasaki Ninja 650R
90 day: 52.02 mpg (US)

B*tch - '01 Honda Civic HX
Team Honda
90 day: 38.09 mpg (US)

Ms. Hyde - '06 Cadillac CTS V
Sports Cars
90 day: 16.93 mpg (US)
Thanks: 375
Thanked 480 Times in 311 Posts
Quote:
Originally Posted by PAFirefighter11 View Post
Thanks a bunch! The mud flaps should be removed, correct?

Also, is there a proven MPG increase from damming up the open grille areas up front?


I know it's ugly but I got a great deal on it!
Doesn't look too ugly to me.

Remove the mudflaps.
Block the upper grill
Block most of the lower grill. Leave a hole on passenger side of the car (radiator should be only half wide on your car, the other half is the AC condenser). Black coroplast should be nearly invisible.

I haven't been able to notice an improvement when I lowered mine, but the temps have been plummeting since I did it, so it's hard to quantify.
__________________
2001 Civic HX Mods


Past Cars:
CTS-V

2003 Silverado Mods
  Reply With Quote
The Following User Says Thank You to darcane For This Useful Post:
PAFirefighter11 (11-22-2013)
Old 11-22-2013, 05:14 PM   #16 (permalink)
Diesel FTW
 
PAFirefighter11's Avatar
 
Join Date: Apr 2013
Location: Flourtown, PA | Bethany, DE
Posts: 91

Golf TDI - '03 Volskwagen Golf TDI GL
90 day: 44.63 mpg (US)
Thanks: 3
Thanked 12 Times in 8 Posts
Thanks for all the aero info help guys! Need to get these flaps off ASAP. Trans is being swapped back to the OE one on Sunday morning, yay! Lower revving will be nice on the highway. I checked on the way in to work this morning and it's at 3200 at 65 MPH.

I may remove this front lip and design something that's better. This one goes upward towards the center. I want it flat/level for the full length.



Quote:
Originally Posted by darcane View Post
Any change in volume because of that?

On my '01 Civic, the muffler fell completely off due to rust. With no muffler at all, it is quieter than the ricer Civics with fart cans. I have to assume that the typical fart can actually amplifies the exhaust note.
There's definitely an increase in noise with the top removed. My theory is that the tip was preventing some of the sound getting to the cab. Now with the tip off it's able to travel a bit more freely towards the cab. This muffler definitely amplifies the sound and really makes me mad. But it's stainless so it should last. I need to look into getting a stock style replacement and selling this. I do worry that I'll need somewhat of an adapter due to the larger size. Downpipe area looks to be 2" or 2 1/4" max. The new stainless pipe goes all the way from the downpipe to the muffler and it's about 2 3/4" or 3" it seems. I'll cross that bridge when I get there though.


Quote:
Originally Posted by darcane View Post
Doesn't look too ugly to me.

Remove the mudflaps.
Block the upper grill
Block most of the lower grill. Leave a hole on passenger side of the car (radiator should be only half wide on your car, the other half is the AC condenser). Black coroplast should be nearly invisible.

I haven't been able to notice an improvement when I lowered mine, but the temps have been plummeting since I did it, so it's hard to quantify.
Thanks! All on the list now. I just raised the back end up 1". It was riding on the bump stops prior to that so my back was killing me! I'm not sure what coroplast is but I'll be Googling it right now.

EDIT: Got it! That advertising sign material. Should be able to drag my fiance to Michaels or some craft store for that lol.

I assume it's better to put on the outside of the grille holes than on the inside? Inside might act as a minor parachute?
__________________
-Rick R
-'03 Volkswagen Golf TDI (49.9 MPG - Stock with Eco Friendly Tires
-'98 Jeep Grand Cherokee 5.9L - 32" MTZ's, 4.5" lift (11.5 MPG)
-'98 Pontiac Firebird Trans Am WS7 5.7L (22 MPG)
-'01 Pontiac Firebird Trans Am WS6 5.7L (22 MPG)
  Reply With Quote
Old 11-23-2013, 04:05 AM   #17 (permalink)
EcoModding Apprentice
 
Join Date: Mar 2012
Location: Adelaide, Australia
Posts: 235

F Truck - '77 Ford F100 2x4, single cab, lwb
90 day: 8.75 mpg (US)

Bombodore - '98 Holden Commodore Exec Wagon
90 day: 21.35 mpg (US)

Civic - '93 Honda Civic GL
90 day: 36.62 mpg (US)

Jim The Prius - '09 Toyota Prius
90 day: 36.66 mpg (US)
Thanks: 154
Thanked 61 Times in 35 Posts
I had an even bigger fart can on mine til a couple of days ago, after cutting it off completely and just having straight pipe its much quieter and more bearable inside the car but my housemate said its louder outside the car than it was, especially in the upper rev range (>3-4krpm)

The grill block on the inside of the factory grill is better than nothing but on the outside will be best if you dont mind the look of it
__________________


(Posted in 2020) 2009 Prius Off Road project: https://ecomodder.com/forum/showthre...ide-38366.html

(Posted in 2012) 1977 F100 Project: http://ecomodder.com/forum/showthrea...tml#post310326
  Reply With Quote
Old 11-23-2013, 11:48 AM   #18 (permalink)
NightKnight
 
NachtRitter's Avatar
 
Join Date: Dec 2008
Location: Placerville, CA
Posts: 1,594

RippinRoo - '05 Subaru Legacy Wagon 2.5 GT
Subaru
90 day: 21.16 mpg (US)

Helga - '00 Volkswagen Jetta TDI
TEAM VW AUDI Group
Diesel
90 day: 53.91 mpg (US)

Olga - '03 Volkswagen Jetta Wagon
90 day: 46.24 mpg (US)
Thanks: 303
Thanked 311 Times in 186 Posts
Quote:
Originally Posted by PAFirefighter11 View Post
I may remove this front lip and design something that's better. This one goes upward towards the center. I want it flat/level for the full length.
There can be benefit to the design that is on there now. If the sides come down where the lower-hanging suspension and the wheels/tires are, then the lip is helping reduce the amount of air flowing over those components. The middle area under the car is usually higher than the suspension, so there may be no benefit in having the lip go down as far as the outsides... in fact, you may end up blocking more air than necessary, thereby increasing the drag.

Notice I say "can be" and "may" ... this is theoretical and would require some testing on your car model to confirm.

  Reply With Quote
Reply  Post New Thread


Tags
aerodynamics, air dam spoiler, better mpg, honda hx, lowered vehicle

Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com