Keith Craft Inc.- We service what we sell!!! Check out our Cobra engines!!! We build high performance racing engines and components for the fast pace strip racing industry as well as daily drivers who want to be FIRST!!!

FE Forums sponsored by Keith Craft Inc.


Go Back   Club Cobra > Engine Building, Tuning, and Induction > FE TALK

Welcome to Club Cobra!  The World's largest non biased Shelby Cobra related site!

  •  » Representation from nearly all Cobra/Daytona/GT40 manufacturers
  •  » Help from all over the world for your questions
  •  » Build logs for you and all members
  •  » Blogs
  •  » Image Gallery
  •  » Many thousands of members and nearly 1 million posts! 

YES! I want to register an account for free right now!  p.s.: For registered members this ad will NOT show

Keith Craft Racing
Nevada Classics
Main Menu
Nevada Classics
Nevada Classics
MMG Superformance
Keith Craft Racing
Advertise at CC
Banner Ad Rates
Keith Craft Racing
MMG Superformance
MMG Superformance
November 2024
S M T W T F S
          1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30

Kirkham Motorsports

Like Tree6Likes

Reply
 
LinkBack Thread Tools Rate Thread Display Modes
  #101 (permalink)  
Old 04-22-2013, 11:46 AM
RodKnock's Avatar
Senior Club Cobra Member
Visit my Photo Gallery

 
Join Date: Feb 2007
Cobra Make, Engine: KMP 539, a Ton of Aluminum
Posts: 9,588
Not Ranked     
Default

Quote:
Originally Posted by ERA Chas View Post
Checked several times over the years.
Is your 30% figure based on an exact wheel match-meaning Hali Cobra 7 1/2 / 9 1/2 wheels like Phil's, Lynn's and originals? Or 30% lighter than the same size steel wheel?
The M & A Castings Advantage
Reply With Quote
  #102 (permalink)  
Old 04-22-2013, 11:48 AM
RodKnock's Avatar
Senior Club Cobra Member
Visit my Photo Gallery

 
Join Date: Feb 2007
Cobra Make, Engine: KMP 539, a Ton of Aluminum
Posts: 9,588
Not Ranked     
Default

Quote:
Originally Posted by patrickt View Post
Unless you're running at the adhesion break point, I don't think you'd notice much of a difference.
I'm always "running at the adhesion break point." Literally and figuratively.
Reply With Quote
  #103 (permalink)  
Old 04-22-2013, 11:52 AM
patrickt's Avatar
Half-Ass Member
Visit my Photo Gallery

 
Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,000
Not Ranked     
Default

Quote:
Originally Posted by RodKnock View Post
RodKnock, you're smarter than that, they're just talking about the elements of aluminum and magnesium, not the wheels. The density of aluminum is 2.7kg/m3 and magnesium is 1.74 -- that's 36% They are not saying their wheels weigh a third less. Now c'mon, you knew that....
Reply With Quote
  #104 (permalink)  
Old 04-22-2013, 11:56 AM
rodneym's Avatar
Full Blown Member
Visit my Photo Gallery
Premier Contributor
 
Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
Not Ranked     
Default

I've got unmounted Trigos and Halibrand mags.
I'll put them on my bathroom scale tonight.
ERA Chas likes this.
__________________
rodneym
Reply With Quote
  #105 (permalink)  
Old 04-22-2013, 11:59 AM
RodKnock's Avatar
Senior Club Cobra Member
Visit my Photo Gallery

 
Join Date: Feb 2007
Cobra Make, Engine: KMP 539, a Ton of Aluminum
Posts: 9,588
Not Ranked     
Default

Quote:
Originally Posted by patrickt View Post
RodKnock, you're smarter than that, they're just talking about the elements of aluminum and magnesium, not the wheels. The density of aluminum is 2.7kg/m3 and magnesium is 1.74 -- that's 36% They are not saying their wheels weigh a third less. Now c'mon, you knew that....
I think I missed those two elements on my Chemistry test when we studied the chapter on the Periodic Table of the Elements.
Reply With Quote
  #106 (permalink)  
Old 04-22-2013, 11:59 AM
glenview289's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Jan 2004
Posts: 69
Not Ranked     
Default Al vs Mag

Aluminum (6061 alloy) weighs 2720 kilograms/cubic meter and Magnesium weighs 1738 kilograms/cubic meter or 36.1% lighter than Aluminum. That percentage could vary depending on what alloy and how much of it is needed to cast the two materials. It is also possible that the cross section of one of the wheel materials may need to change to achieve the same strength and therefore also affect the weight difference. I think that if the Magnesium wheels were always available, regardless of any weight advantage, you would see a lot more of them because they are just another one of the cool and unique features of these cars.

Bill
Reply With Quote
  #107 (permalink)  
Old 04-22-2013, 12:02 PM
rodneym's Avatar
Full Blown Member
Visit my Photo Gallery
Premier Contributor
 
Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
Not Ranked     
Default

duplicate post
__________________
rodneym

Last edited by rodneym; 04-22-2013 at 10:38 PM..
Reply With Quote
  #108 (permalink)  
Old 04-22-2013, 12:26 PM
patrickt's Avatar
Half-Ass Member
Visit my Photo Gallery

 
Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,000
Not Ranked     
Default

Quote:
Originally Posted by RodKnock View Post
I think I missed those two elements on my Chemistry test when we studied the chapter on the Periodic Table of the Elements.
Here's a fast shot I took of the back wheel after putting it back on, again, this morning after the weighing process. Now you gotta admit, for a weekend's worth of work...


Last edited by patrickt; 11-04-2016 at 09:40 AM..
Reply With Quote
  #109 (permalink)  
Old 04-22-2013, 12:33 PM
CC Member
Visit my Photo Gallery

 
Join Date: Oct 2003
Posts: 4,078
Not Ranked     
Default

Quote:
Originally Posted by glenview289 View Post
It is also possible that the cross section of one of the wheel materials may need to change to achieve the same strength and therefore also affect the weight difference.
Bill
An excellent point. Both companies may use different structure in the webs, hubs and rims also.
You should post here more than 42 times in 9 years Bill.
__________________
Chas.
Reply With Quote
  #110 (permalink)  
Old 04-22-2013, 04:38 PM
patrickt's Avatar
Half-Ass Member
Visit my Photo Gallery

 
Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,000
Not Ranked     
Default

Quote:
Originally Posted by rodneym View Post
I've got unmounted Trigos and Halibrand mags.
I'll put them on my bathroom scale tonight.
Uhhh, why don't you just knock off early today and trot on home to weigh those wheels? No stopping at your favorite watering-hole, either.
Reply With Quote
  #111 (permalink)  
Old 04-22-2013, 10:33 PM
rodneym's Avatar
Full Blown Member
Visit my Photo Gallery
Premier Contributor
 
Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
Not Ranked     
Default

Well, I did what I said I'd do.
The problem is that my scale wouldn't weigh anything that light (it's a digital scale).
Sorry.
__________________
rodneym
Reply With Quote
  #112 (permalink)  
Old 04-23-2013, 04:24 AM
patrickt's Avatar
Half-Ass Member
Visit my Photo Gallery

 
Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,000
Not Ranked     
Default OK, this is a toughie...

Quote:
Originally Posted by rodneym View Post
Well, I did what I said I'd do.
The problem is that my scale wouldn't weigh anything that light (it's a digital scale).
Sorry.
1) Weigh yourself.
2) Weigh yourself while holding a wheel.
3) Subtract the two weights.

<sigh>
Reply With Quote
  #113 (permalink)  
Old 04-23-2013, 07:46 AM
RodKnock's Avatar
Senior Club Cobra Member
Visit my Photo Gallery

 
Join Date: Feb 2007
Cobra Make, Engine: KMP 539, a Ton of Aluminum
Posts: 9,588
Not Ranked     
Default

Quote:
Originally Posted by patrickt View Post
1) Weigh yourself.
2) Weigh yourself while holding a wheel.
3) Subtract the two weights.

<sigh>
That reminds me. I have an algebra test Friday.
Reply With Quote
  #114 (permalink)  
Old 04-23-2013, 07:50 AM
patrickt's Avatar
Half-Ass Member
Visit my Photo Gallery

 
Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,000
Not Ranked     
Default

Quote:
Originally Posted by RodKnock View Post
That reminds me. I have an algebra test Friday.
Well whatever you do, don't cheat off rodneym.
Reply With Quote
  #115 (permalink)  
Old 04-23-2013, 11:55 AM
rodneym's Avatar
Full Blown Member
Visit my Photo Gallery
Premier Contributor
 
Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
Not Ranked     
Default

I will not tare myself for your sick pleasures, sir.

It was a subconsciously induced brain fart. My Id rejected to contributing to a thread with the word fluoroelestomer in it.
__________________
rodneym
Reply With Quote
  #116 (permalink)  
Old 04-23-2013, 11:57 AM
patrickt's Avatar
Half-Ass Member
Visit my Photo Gallery

 
Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,000
Not Ranked     
Default

Quote:
Originally Posted by rodneym View Post
I will not tare myself for your sick pleasures, sir.

It was a subconsciously induced brain fart. My Id rejected to contributing to a thread with the word fluoroelestomer in it.
You don't have to tell us how much you weigh, just the wheels.
Reply With Quote
  #117 (permalink)  
Old 04-23-2013, 12:00 PM
rodneym's Avatar
Full Blown Member
Visit my Photo Gallery
Premier Contributor
 
Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
Not Ranked     
Default

I don't want to know how much I weigh!!!
__________________
rodneym
Reply With Quote
  #118 (permalink)  
Old 04-23-2013, 12:11 PM
RodKnock's Avatar
Senior Club Cobra Member
Visit my Photo Gallery

 
Join Date: Feb 2007
Cobra Make, Engine: KMP 539, a Ton of Aluminum
Posts: 9,588
Not Ranked     
Default

Quote:
Originally Posted by rodneym View Post
I don't want to know how much I weigh!!!
May I suggest an Ironman Scale? It will not only tell you the weight of your wheels, but also tell you your body fat %.
Reply With Quote
  #119 (permalink)  
Old 04-23-2013, 12:35 PM
patrickt's Avatar
Half-Ass Member
Visit my Photo Gallery

 
Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,000
Not Ranked     
Default

Well are we going to get the dang weights of the wheels or not? Lemmee tell you, one way to get in shape is take those suckers on and off your car a couple of times and lug them around for one reason or another.
Reply With Quote
  #120 (permalink)  
Old 04-23-2013, 12:42 PM
RodKnock's Avatar
Senior Club Cobra Member
Visit my Photo Gallery

 
Join Date: Feb 2007
Cobra Make, Engine: KMP 539, a Ton of Aluminum
Posts: 9,588
Not Ranked     
Default

Quote:
Originally Posted by patrickt View Post
Lemmee tell you, one way to get in shape is take those suckers on and off your car a couple of times and lug them around for one reason or another.
Only if you repeated it everyday for the rest of your life.

Yes, I want to know the difference in weight between the aluminum and magnesium wheels as well.
Reply With Quote
Reply



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 04:05 AM.


Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: CC Policy