roll cage questions

Old 02-11-2008, 05:38 PM
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bamacj
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Default roll cage questions

Getting ready to order a 10 point cage for my back half s10. No motor yet so I dont know what its going to run. I would like the cage to be good for at least 6.0et 1/8 mile. Where can i find out what the specs for the cage should be? My s/w catalog has 3 types, ews/dom/chrome moley"4130"

Thanks Joe
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Old 02-12-2008, 02:02 PM
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olds48
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I don't know.But don't let people mislead you on chromoly.Chromoly is steel,mild steel is steel.Steel wieghs what steel weighs.The only reason Cm is lighter is it is stronger and you can reduce wall thickness.The people at S&W told me the wieght difference between Cm and MS on a 10 point cage is only about 30 lbs.Not enuff for me tos spend another $300.Just my .02c.Plus it has to be TIG welded. :? Pain in the......
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Old 02-12-2008, 04:39 PM
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jmarksdragster
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Go with 1 5/8 or 1 3/4 .120 wall DOM mild steel.
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Old 02-12-2008, 04:54 PM
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bamacj
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Does all cages require tig welding or is that just for c/m?
Thanks for the reply's Joe
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Old 02-12-2008, 08:11 PM
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olds48
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Just CM.Everything else can be MIG welded.They don't allow stick welded at all
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Old 02-13-2008, 12:01 AM
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Bubstr
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The weight savings comes from thiner wall thickness on C/M. 1 3/4 DOM .120 weighs 2.089 a foot. C/M in .083 same diameter weighs 1.478 and .095 weighs 1.679 for the same foot. Mild steel and C/M weigh the same if they are the same size.
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Old 02-14-2008, 02:55 PM
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bamacj
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Thanks for the reply's. Just one more question, why is the "ews" cages so much cheaper? Are they not legal?
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Old 02-14-2008, 03:38 PM
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olds48
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EWS stands for electric welded seam.It is a flat bar of steel rolled into a circle and the seem is welded.DOM stands for drawn over mandrel,it has no seams.More expensive to produce and stronger since there is no seam to theoritically fail.That's where the cost comes in.
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Old 02-14-2008, 04:14 PM
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mcracecars
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ews is also known by crew tube, or cold rolled electricly welded....

also to clarify..... dom is actually seamed tubing, it is drawn over a mandrel to smooth out the seam, and to make the tube thickness more uniform.
chrome moly is a true seamless tube, as it is manufactured by drawing 4130 solid rods over a mandrel (heated of course) to get it into a tube of the required thickness. This is a simplified explaination, as there are other steps involved in both proceedures.
this is how I understand it anyway.... :wink:
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Old 02-14-2008, 04:39 PM
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olds48
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I did not know that ops: .Guess I should keep my mouth shut until I learn some more
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