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Old 06-11-2014, 03:44 PM   #11 (permalink)
The Lisle Luddite Lodge
 
Join Date: Apr 2014
Location: Central New York State
Posts: 12

The Honda - '91 Honda Civic LX
90 day: 34.67 mpg (US)
Thanks: 3
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Rear suspension aero detail question?

I am halfway through my second full tank of gas and have logged 220 miles so it seems on track to maintain the nice mileage numbers. I am not sure I will have the patience to get three full tanks through it before I start the modifications. I have to at the least get the rocker panels and rear wheel wells together before next winter as well. At the rate we move that means I need to get started.

This car here is pretty much what I pictured doing when we aquired this car.
http://ecomodder.com/forum/showthrea...tml#post419709

I have some ideas for additional details but that is what I am shooting at.

I have idenified an interesting detail on my car and it has created several questons for me.

First what is it?



Second: What does it do?



I have never paid much attention to fine details like this so I am not sure I see how the turbulance around the wheels works in this example.

My first thought was that it is deflecting air that would be hitting the suspension arm into the hollow of the actual wheel.

My second thought was that it is deflecting the turbulance caused by the tire back into the wheel to minimize its effects.

I am wondering, given the nature of some of the other design details, if the engineers left the holes in the wheels, and covers I suppose, to allow the air pressure to equalize keeping that deflected air from creating turbulance if it has nowhere to go?

I noticed that few if any HIgh mpg cars come with solid wheels or smooth covers.

So as I plan my skirts, wheel well covers and Kammback transitions those were the first questions that came up.

Thanks in advance.

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1991 Civic LX
Operator software optimized for efficiency

Current modifications:
Vacuum gauge
Deleted rear mud flaps

Planned modifications:
Manual torque converter lock up
Full gauges (only has factory temp gauge)
MpGuino
Large front air dam (covering front grill)
Skirts
Rear Wheel enclosure
Partial rear pan
Kammback

Last edited by Luddite Lodge; 06-11-2014 at 03:45 PM.. Reason: spelling
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Old 06-12-2014, 01:37 AM   #12 (permalink)
Too many cars
 
Gasoline Fumes's Avatar
 
Join Date: Oct 2009
Location: New York State
Posts: 1,329

CRXFi - '88 Honda CRX XFi

Insight 256 - '00 Honda Insight
Team Honda
Gen-1 Insights

Insight 5342 - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 64.18 mpg (US)
Thanks: 794
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I took those off my Wagon when doing some suspension work. I'm not sure what their purpose is.
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Old 06-12-2014, 11:56 AM   #13 (permalink)
Cyborg ECU
 
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Join Date: Mar 2011
Location: Coastal Southern California
Posts: 5,772

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
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I think the reason "few if any high mpg cars" come with smooth wheel covers or solid wheels is mainly marketing. Most people don't like em. But there could be some brake cooling considerations too. Some people will lean on the brakes hard, by habit or of necessity (live in a mountainous places, anyone?). That said, the first gen insight and the civic hybrid had some flat, nealry solid wheel covers on them. I also think those were ways cool, good looking wheels.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.

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Old 06-15-2014, 12:44 PM   #14 (permalink)
The Lisle Luddite Lodge
 
Join Date: Apr 2014
Location: Central New York State
Posts: 12

The Honda - '91 Honda Civic LX
90 day: 34.67 mpg (US)
Thanks: 3
Thanked 2 Times in 2 Posts
Affodable Wheel covers?

I do have to brake hard sometimes with the stops at the bottom of the hills around here.
I am going to go with the smooth wheel covers, I will just have to pay attention and see if I get any brake fade.

I am still intrigued by that rear suspension deflector, it has to be there for a reason, I am going to try to include it in my thinking.

Does anyone know if the insight or civic hybrid wheel covers will fit my older civic? I had a wheel cross reference chart once that I am not finding now.

I have 2 sets of the bolt on honda covers that I can not see how to easily convert to smooth.

I found these:


But they are kind of pricey for us.

These are convertible but are also kind of pricey for us.



All suggestions welcome.

Thanks
__________________
1991 Civic LX
Operator software optimized for efficiency

Current modifications:
Vacuum gauge
Deleted rear mud flaps

Planned modifications:
Manual torque converter lock up
Full gauges (only has factory temp gauge)
MpGuino
Large front air dam (covering front grill)
Skirts
Rear Wheel enclosure
Partial rear pan
Kammback

Last edited by Luddite Lodge; 06-15-2014 at 01:04 PM.. Reason: lost some text
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Old 06-15-2014, 01:12 PM   #15 (permalink)
Cyborg ECU
 
California98Civic's Avatar
 
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 5,772

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,149
Thanked 1,856 Times in 1,265 Posts
Maybe the deflector protects something in the suspension from road debris?
__________________


See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.

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Old 06-15-2014, 02:10 PM   #16 (permalink)
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I believe those help with getting clean air to the brakes.

Quote:
Originally Posted by Gasoline Fumes View Post
I took those off my Wagon when doing some suspension work. I'm not sure what their purpose is.
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Old 06-21-2014, 05:21 AM   #17 (permalink)
Too many cars
 
Gasoline Fumes's Avatar
 
Join Date: Oct 2009
Location: New York State
Posts: 1,329

CRXFi - '88 Honda CRX XFi

Insight 256 - '00 Honda Insight
Team Honda
Gen-1 Insights

Insight 5342 - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 64.18 mpg (US)
Thanks: 794
Thanked 608 Times in 359 Posts
Quote:
Originally Posted by California98Civic View Post
Maybe the deflector protects something in the suspension from road debris?
That's what I'm leaning towards. In the parts diagrams, Honda calls them covers. Directly behind them is the lower shock bolt. On my Wagon, there are plastic covers over the lower control arm inner bolts too. Didn't help in rusty New York, I still had to cut the shock bolts out in pieces.

The way they're angled, they would send some air towards the rear drums. But I don't know if the rear brakes need any airflow. And they might direct water kicked up by the front tires towards the rear drums. I'm not really sure what the deflectors are for and I'm not really sure why I removed them.

8 & 11 in this diagram:

http://stores.revolutionparts.com/ho...peed-automatic

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