Chin spoiler and tire spats

[aerohead]

Originally Posted by Cd

I'm puzzled because the smooth wheels helped the drag yet the spat did nothing for the drag.

It sounds as if you mean that the front airdam keeps air from colliding with the tire, spoiling an opportunity for the spat to function, yet the wheel covers ( Moon discs ) functioned as they did, so plenty of air was getting to that area.

Without the wheel being even with the outer edge of the spat,the forward face of the spat is being attacked by the airstream.It may have a local Cd as high as 1.11 right there,with full separation,and turbulence following it far down the rocker area.

[66sprint6]

Ok, ive still got the first chin spoiler we made, and could finish it up and install it to try out, but now I have a question. What would be better, chin spoiler and tire spats, or do a front underbody tray from the bumper to the front suspension and then some spats along with that? If the tray would be better I wouldnt have to worry about the ground clearance but then again I can make the spoiler a bit higher to deal with it if needed. I appreciate any advice!
Matt

[aerohead]

Originally Posted by Frank Lee

Like that boxy yet sleek old Lexus sedan, whatever that was.

would that be the '89 LS 400,@ Cd 0.29?

[aerohead]

Originally Posted by tru

I think ur confused, as was i on first inspection. the spat is on the front side upstream on the rear tires.

tru,it just hit me that I was interpreting the airflow from left to right which would make the tail the nose!
Good grief!
My apology to all.
Is this the Camaro with the aluminum nose which is completely sealed?

[aerohead]

Originally Posted by Cd

I'm puzzled because the smooth wheels helped the drag yet the spat did nothing for the drag.

It sounds as if you mean that the front airdam keeps air from colliding with the tire, spoiling an opportunity for the spat to function, yet the wheel covers ( Moon discs ) functioned as they did, so plenty of air was getting to that area.

Cd,I just realized I've been dyslexic on this whole thread.
My brain was interpreting the image with airflow from the left to right.
tru tried to set me right and it went right over my head.
Is this the Camaro with the aluminum nose which extends to almost ground level?
I need to know exactly which car this is.I apologize for the mix-up.( you guys need to keep a close eye on me!).

[66sprint6]

Originally Posted by 66sprint6

Ok, ive still got the first chin spoiler we made, and could finish it up and install it to try out, but now I have a question. What would be better, chin spoiler and tire spats, or do a front underbody tray from the bumper to the front suspension and then some spats along with that? If the tray would be better I wouldnt have to worry about the ground clearance but then again I can make the spoiler a bit higher to deal with it if needed. I appreciate any advice!
Matt

Im workin on a 93 Escort, not the salt flat camaro, please refer to question asked above and keep posts on topic.
Thanks
Matt

[aerohead]

Originally Posted by 66sprint6

Im workin on a 93 Escort, not the salt flat camaro, please refer to question asked above and keep posts on topic.
Thanks
Matt

Matt,I would recommend you do the front airdam first.I didn't find a photo of your chin spoiler.Did I miss a link?
Today's NASCAR noses( without the splitter) would be a good example for a nose remodel for healthy airflow if you wanted to take it that far.The lower portion could be a flexible material to deal with curbs and parking hazards.
After that you could appraise your situation and go from there.

[66sprint6]

Thanks! I didnt take a pic, it was too dark and we never finished it. I believe we will reuse the brackets and run somethin more flexible like what you stated, maybe some garden edging or similar. I got to thinking about the underbody pan, but if you look at the front of my car, there is alot of "ugly" that sticks out below the bottom of the front bumper so my belly pan would have to come down abruptly, then smooth out in order to cover it all up. A front splitter or apron would cover it...then maybe make a pan connected to it? I need new struts for this thing so Im thinkin bout loweing it an inch or two as well down the road.

Heres a picture of the "ugly" under the bumper.



Matt

[California98Civic]

Originally Posted by aerohead

Today's NASCAR noses( without the splitter) would be a good example for a nose remodel for healthy airflow if you wanted to take it that far.The lower portion could be a flexible material to deal with curbs and parking hazards.

Perhaps like this:
http://media.scenedaily.com/images/5...r-Nascar-2.jpg

james

[Cd]

Originally Posted by aerohead

would that be the '89 LS 400,@ Cd 0.29?

That car had a Cd of .29 was tweaked further to .28 and finally .27 in series III trim
Source : Lexus LS400






The next generation LS430 had an even lower Cd of .26, and .25 with optional air suspension, which lowered the car around an inch.



Despite LOOKING sleeker, the current generation ls460 is also .26
( I suspect the wheels have to do with the higher drag )

Sources :
LS | Detailed Specifications



LS430 :



LS460 :