Re: 63-67 b body- reducing drag coefficient
[Re: dvw]
#2535011
08/12/18 11:35 AM
08/12/18 11:35 AM
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Joined: Feb 2003
Posts: 6,849
fullmetaljacket
master
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master
Joined: Feb 2003
Posts: 6,849
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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.
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Re: 63-67 b body- reducing drag coefficient
[Re: RustyM]
#2535326
08/12/18 10:00 PM
08/12/18 10:00 PM
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Joined: Oct 2007
Posts: 4,210 New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,210
New York
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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
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Re: 63-67 b body- reducing drag coefficient
[Re: RustyM]
#2535718
08/13/18 04:57 PM
08/13/18 04:57 PM
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Joined: Jan 2005
Posts: 12,423 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,423
Kalispell Mt.
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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!
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Re: 63-67 b body- reducing drag coefficient
[Re: RustyM]
#2536155
08/14/18 01:55 PM
08/14/18 01:55 PM
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Joined: Dec 2003
Posts: 22,717 Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,717
Bitopia
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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.
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