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  #101 (permalink)  
Old 04-22-2013, 11:46 AM
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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
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  #102 (permalink)  
Old 04-22-2013, 11:48 AM
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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.
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  #103 (permalink)  
Old 04-22-2013, 11:52 AM
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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....
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  #104 (permalink)  
Old 04-22-2013, 11:56 AM
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I've got unmounted Trigos and Halibrand mags.
I'll put them on my bathroom scale tonight.
ERA Chas likes this.
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  #105 (permalink)  
Old 04-22-2013, 11:59 AM
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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.
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  #106 (permalink)  
Old 04-22-2013, 11:59 AM
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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
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  #107 (permalink)  
Old 04-22-2013, 12:02 PM
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duplicate post
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Last edited by rodneym; 04-22-2013 at 10:38 PM..
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  #108 (permalink)  
Old 04-22-2013, 12:26 PM
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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..
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  #109 (permalink)  
Old 04-22-2013, 12:33 PM
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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.
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  #110 (permalink)  
Old 04-22-2013, 04:38 PM
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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.
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  #111 (permalink)  
Old 04-22-2013, 10:33 PM
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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.
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  #112 (permalink)  
Old 04-23-2013, 04:24 AM
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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>
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  #113 (permalink)  
Old 04-23-2013, 07:46 AM
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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.
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  #114 (permalink)  
Old 04-23-2013, 07:50 AM
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That reminds me. I have an algebra test Friday.
Well whatever you do, don't cheat off rodneym.
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  #115 (permalink)  
Old 04-23-2013, 11:55 AM
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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.
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  #116 (permalink)  
Old 04-23-2013, 11:57 AM
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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.
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  #117 (permalink)  
Old 04-23-2013, 12:00 PM
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I don't want to know how much I weigh!!!
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  #118 (permalink)  
Old 04-23-2013, 12:11 PM
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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 %.
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  #119 (permalink)  
Old 04-23-2013, 12:35 PM
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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.
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  #120 (permalink)  
Old 04-23-2013, 12:42 PM
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Quote:
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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.
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