Previous Thread
Next Thread
Print Thread
Page 2 of 2 1 2
Re: 63-67 b body- reducing drag coefficient [Re: RustyM] #2534974
08/12/18 10:43 AM
08/12/18 10:43 AM
Joined: Mar 2006
Posts: 9,791
MI, usa
dvw Offline
master
dvw  Offline
master

Joined: Mar 2006
Posts: 9,791
MI, usa
Has anybody run a B Body at speed (around 150) with the bumper/K Frame closed off? How about the rear below the trunk floor to bumper. I'm wondering if it creates any lift? I can't run an air dam or spoiler do to rules. The underneath pans at the front and rear are interesting.
Doug

Re: 63-67 b body- reducing drag coefficient [Re: dvw] #2535011
08/12/18 11:35 AM
08/12/18 11:35 AM
Joined: Feb 2003
Posts: 6,849
F
fullmetaljacket Offline
master
fullmetaljacket  Offline
master
F

Joined: Feb 2003
Posts: 6,849
I've run a thin aluminum air dam underneath the trunk floor to the rear bumper for years, but one; I've never reached or breached the 150 MPH point, and two; I've never looked at my mph figures after doing such advancements.
Too much to explain, but I strongly believe the trunk to rear bumper is a huge subterranean parachute and when closed off rather easily, can make some eyebrows lift, not the car.
I've even thought about foils and small dams at perpendicular points of the chassis ie: Trans and torsion bar cross member, rear spring hanger members, all painted slippery gloss, etc.) where they could lend a hand in underbelly air management. This could/would be equivalent to lowering the car all together.
I was even thinking that swooped muffler designs would help a whole lot in street/strip applications.
Mufflers, talk about an underbelly 55' Chevy shoebox right in the air stream.

Re: 63-67 b body- reducing drag coefficient [Re: RustyM] #2535326
08/12/18 10:00 PM
08/12/18 10:00 PM
Joined: Oct 2007
Posts: 4,205
New York
polyspheric Offline
master
polyspheric  Offline
master

Joined: Oct 2007
Posts: 4,205
New York
The grill is FLAT, ugly and a total air trap

Move it forward as much as you can (like the Charger), and blank the areas that don't directly feed the radiator core.


Boffin Emeritus
Re: 63-67 b body- reducing drag coefficient [Re: RustyM] #2535718
08/13/18 04:57 PM
08/13/18 04:57 PM
Joined: Jan 2005
Posts: 12,406
Kalispell Mt.
H
HotRodDave Offline
I Live Here
HotRodDave  Offline
I Live Here
H

Joined: Jan 2005
Posts: 12,406
Kalispell Mt.
Before building fancy stuff hoping for improvements you can always experiment with duct tape first and replicate the stuff that helps with sheetmetal after improvements are verified/justified


I am not causing global warming, I am just trying to hold off a impending Ice Age!



Re: 63-67 b body- reducing drag coefficient [Re: RustyM] #2535748
08/13/18 05:45 PM
08/13/18 05:45 PM
Joined: Feb 2017
Posts: 566
Texas
R
RustyM Offline OP
mopar
RustyM  Offline OP
mopar
R

Joined: Feb 2017
Posts: 566
Texas
i can create a crude set of wind tests here either in my paint booth or in a big tent i have.
Wind i can create and i have high end fog machines so i can direct visible air flow over the car, was hoping for ideas, pics from others that had done things they knew worked in order to save time.

If i flow the car, will try to let yall know what i find out.

Re: 63-67 b body- reducing drag coefficient [Re: RustyM] #2536155
08/14/18 01:55 PM
08/14/18 01:55 PM
Joined: Dec 2003
Posts: 22,695
Bitopia
J
jcc Offline
If you can't dazzle em with diamonds..
jcc  Offline
If you can't dazzle em with diamonds..
J

Joined: Dec 2003
Posts: 22,695
Bitopia
Originally Posted By RustyM
i can create a crude set of wind tests here either in my paint booth or in a big tent i have.
Wind i can create and i have high end fog machines so i can direct visible air flow over the car, was hoping for ideas, pics from others that had done things they knew worked in order to save time.

If i flow the car, will try to let yall know what i find out.


IMO (idea), coast down tests are more useful to the backyard DIY, if you can replicate accurately on a closed road section(?), both directions. But "GIGO" still applies. It would be hard to understand reliably others interpretation of backyard tent wind tests.

If you are indeed serious, I would go down the path of nearly completely covering the underside of the chassis, as much as possible, from a wind drag standpoint, in that that would give the best you can achieve from that side of the car, It would not need to pretty or elegant, just be cheap. easy, not flap, nor detach or catch fire. You would then know the ultimate target and reward for any chassis streamlining, and whether its worth it or not. Then you can go after the other 5 sides.

Last edited by jcc; 08/14/18 02:02 PM.

Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
Re: 63-67 b body- reducing drag coefficient [Re: RustyM] #2536179
08/14/18 02:39 PM
08/14/18 02:39 PM
Joined: Feb 2003
Posts: 6,849
F
fullmetaljacket Offline
master
fullmetaljacket  Offline
master
F

Joined: Feb 2003
Posts: 6,849
As soon as I get back home, I'll flick the special parts on my car to give you an idea of what I've done to cut air or at least manage it.

Page 2 of 2 1 2






Powered by UBB.threads™ PHP Forum Software 7.7.1