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11-20-2005, 10:26 PM
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#1
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3 pedals>*
Join Date: Oct 2005
Posts: 2,024
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Wind diffuser
What do you think about them??? Would they work if you placed them under the car where the spare??
Would it hurt mpg?
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11-20-2005, 11:16 PM
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#2
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*shrug*
Join Date: Sep 2005
Posts: 7,406
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If it cuts down on
If it cuts down on resistance it should help.
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11-20-2005, 11:41 PM
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#3
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3 pedals>*
Join Date: Oct 2005
Posts: 2,024
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I think it might hurt my mpg
I think it might hurt my mpg is because my car is really high off the ground.
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11-21-2005, 03:56 AM
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#4
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3 pedals>*
Join Date: Oct 2005
Posts: 2,024
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Ok after some careful
Ok after some careful research I have come to a few conclusions.
*The air has to have a good transition from one part to another, there can't be big gaps in between the parts.
*There has to be a good flow which means the surface should be smooth.
*Don't get the air trapped in the rear bumper, at 5mph it doesn't matter but at 65mph the rear bumper works like a parachute for the incoming air. The less wind resistence under the car the faster the car will go and the less force you need to push it.
I'm thinking If i put a wind diffuser under my car where the spare is I'll gain 1mpg for sure. Every little thing counts in the mpg war.
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11-21-2005, 07:36 AM
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#5
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Moderator
Join Date: Oct 2005
Location: Newnan, GA
Posts: 1,615
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The Civic VX has a rear
The Civic VX has a rear bumper wind diffuser on it already. (just a little trivia)
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11-21-2005, 07:57 AM
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#6
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New Member
Join Date: Oct 2005
Posts: 21
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"*Don't get the air trapped
"*Don't get the air trapped in the rear bumper, at 5mph it doesn't matter but at 65mph the rear bumper works like a parachute for the incoming air. The less wind resistence under the car the faster the car will go and the less force you need to push it."
I have been intrigued one of the tricks some of the drag racers have been using...holes in the rear bumper to allow that air to flow out.
Here's a premade version: 
...but I'd need concrete, measureable results before I cut two big hole in my bumper. |
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11-21-2005, 08:04 AM
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#7
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3 pedals>*
Join Date: Oct 2005
Posts: 2,024
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Re: The Civic VX has a rear
Quote:
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Originally Posted by DaX
The Civic VX has a rear bumper wind diffuser on it already. (just a little trivia)
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Yes but I don't have a civic, I have a 3000lb behemeth that has a 150hp 4 cylender motor.
I was mainly looking at the new civic coupe. On the honda website you can click the 360 3D view and see the underside of it and the wind diffuser under the car.
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11-21-2005, 08:19 AM
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#8
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3 pedals>*
Join Date: Oct 2005
Posts: 2,024
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I'm not going to cut holes
I'm not going to cut holes in my bumper, there are other methods.
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11-21-2005, 08:29 AM
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#9
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Driving on E
Join Date: Sep 2005
Location: Salt Lake City, UT
Posts: 3,993
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Re: I'm not going to cut holes
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Originally Posted by Compaq888
I'm not going to cut holes in my bumper, there are other methods.
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I'm actually thinking of cutting holes in my bumper eventually and covering it with some black metal screen material. Maybe in the spring I'll get a donor bumper and do it myself.
If you guys have any good links to websites that talk about diffusers I'd love to read them. I think it would be a way cool mod to do. |
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11-21-2005, 08:32 AM
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#10
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3 pedals>*
Join Date: Oct 2005
Posts: 2,024
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check the 360 3D view of the
check the 360 3D view of the new civic coupe on the honda.com website. You'll see exactly what i'm talking about.
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11-21-2005, 11:13 AM
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#11
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3 pedals>*
Join Date: Oct 2005
Posts: 2,024
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Checked under my car and a
Checked under my car and a thick piece of plastic can just go under the spare tire compartment. Not only will there be less wind resistance but it will block all the small pockets where air can get held up.
My spare compartment actually hangs lower than the bumper, so do you think I should still go through this???
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11-21-2005, 06:21 PM
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#12
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*shrug*
Join Date: Sep 2005
Posts: 7,406
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Go for it, just make sure
Go for it, just make sure everything's smooth and not in a way to obstruct airflow.
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11-22-2005, 07:52 PM
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#13
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granny just passed me
Join Date: Sep 2005
Location: Pittsburgh, PA
Posts: 1,200
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I have been thinking about
I have been thinking about cutting holes in my bumper also. But i am too chicken.
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2008 EPA adjusted:
Distance traveled by bicycle in 2007= 1,830ish miles
Average commute speed=25mph (yes, that's in a car)
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11-28-2005, 11:33 AM
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#14
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New Member
Join Date: Nov 2005
Posts: 19
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Why not just remove the
Why not just remove the bumper, people?
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11-28-2005, 11:38 AM
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#15
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Driving on E
Join Date: Sep 2005
Location: Salt Lake City, UT
Posts: 3,993
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Re: Why not just remove the
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Originally Posted by mjo
Why not just remove the bumper, people?
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LOL. If it was only that easy. Stupid safety laws. |
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11-28-2005, 05:52 PM
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#16
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granny just passed me
Join Date: Sep 2005
Location: Pittsburgh, PA
Posts: 1,200
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I saw a truck today with no
I saw a truck today with no front or rear bumper on it. Of coure this was in the country.
__________________
2008 EPA adjusted:
Distance traveled by bicycle in 2007= 1,830ish miles
Average commute speed=25mph (yes, that's in a car)
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11-28-2005, 06:16 PM
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#17
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Driving on E
Join Date: Sep 2005
Location: Salt Lake City, UT
Posts: 3,993
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Something I didn't think
Something I didn't think about before. If the majority of driving is city driving there is little need to adjust for aerodynamic drag. Aerodynamic drag is only a factor at highway speeds.
So unless you're on the freeway/interstate on a regular basis, I would recommend not spending the time/money on it.
But then again, I'm the one spending crazy amounts of money trying to squeeze every mpg out of my car, so don't listen to me.
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