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CC Advertisers
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 6Likes
04-21-2013, 06:55 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Quote:
Originally Posted by ERA Chas
Would you do me a favor now??
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But of course.  Tomorrow I will pull them back off and weigh them (bathroom scale, but pretty accurate). I know what my Yokos weigh.  |
04-22-2013, 10:11 AM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
How much do those Trigos weigh?
Chas, my front 235-50-15 Trigos, with Yokos, weigh 43 lbs. The tires alone weigh 26 lbs. The front wheels are 17 lbs.
My rear 295-50-15 Trigos, with Yokos, weigh 54 lbs. The tires alone weigh 32 lbs. The rear wheels are 22 lbs.
Avon CR6ZZ 245/60VR15 weigh 30 lbs.
Avon CR6ZZ 295/50VR15 weigh 34 lbs.
http://rogerkrausracing.com/racetire...CR500+2013.pdf |
04-22-2013, 10:30 AM
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Senior Club Cobra Member
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Join Date: Feb 2007
Cobra Make, Engine: KMP 539, a Ton of Aluminum
Posts: 9,592
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Not Ranked
Quote:
Originally Posted by patrickt
The front wheels are 17 lbs. The rear wheels are 22 lbs.
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Quote:
Originally Posted by ERA Chas
My uncoated, unfinished wheels weigh 17.8-F / 19.7-R.
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The weights of each set of wheels doesn't seem right. Magnesium wheels are advertised as being approx. 30% less weight. |
04-22-2013, 10:33 AM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Quote:
Originally Posted by RodKnock
The weights of each set of wheels doesn't seem right. Magnesium wheels are advertised as being approx. 30% less weight.
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Surely someone on here has unmounted Trigos and can put them on the scale to double check me. But I think I'm right (did it twice, all four wheels). Now this is a bathroom scale, but I did check the calibration of it with 30lbs of my son's free weights, and it was accurate. |
04-22-2013, 10:34 AM
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CC Member
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Join Date: Oct 2003
Posts: 4,078
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Not Ranked
Quote:
Originally Posted by RodKnock
The weights of each set of wheels doesn't seem right. Magnesium wheels are advertised as being approx. 30% less weight.
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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?
__________________
Chas.
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04-22-2013, 10:43 AM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Uhhh, RodKnock, original mags with Avons look like they come in higher than Trigos and Yokos.  Unless you're running at the adhesion break point, I don't think you'd notice much of a difference.... |
04-22-2013, 11:48 AM
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Senior Club Cobra Member
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Join Date: Feb 2007
Cobra Make, Engine: KMP 539, a Ton of Aluminum
Posts: 9,592
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Not Ranked
Quote:
Originally Posted by patrickt
Unless you're running at the adhesion break point, I don't think you'd notice much of a difference.
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I'm always "running at the adhesion break point." Literally and figuratively.  |
04-22-2013, 11:56 AM
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Full Blown Member
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Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
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Not Ranked
I've got unmounted Trigos and Halibrand mags.
I'll put them on my bathroom scale tonight.
__________________
rodneym
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04-22-2013, 12:02 PM
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Full Blown Member
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Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
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Not Ranked
duplicate post
__________________
rodneym
Last edited by rodneym; 04-22-2013 at 10:38 PM..
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04-22-2013, 11:59 AM
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CC Member
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Join Date: Jan 2004
Posts: 69
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Not Ranked
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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04-22-2013, 12:33 PM
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CC Member
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Join Date: Oct 2003
Posts: 4,078
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Not Ranked
Quote:
Originally Posted by glenview289
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
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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.
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04-22-2013, 11:46 AM
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Senior Club Cobra Member
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Join Date: Feb 2007
Cobra Make, Engine: KMP 539, a Ton of Aluminum
Posts: 9,592
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Not Ranked
Quote:
Originally Posted by ERA Chas
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?
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The M & A Castings Advantage |
04-22-2013, 11:52 AM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Quote:
Originally Posted by RodKnock
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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.... |
04-22-2013, 11:59 AM
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Senior Club Cobra Member
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Join Date: Feb 2007
Cobra Make, Engine: KMP 539, a Ton of Aluminum
Posts: 9,592
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Not Ranked
Quote:
Originally Posted by patrickt
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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