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Material Question
I going to order my Chomemoly tubing for my cage. 1 5/8" O.D. 4130 by 0.083" wall thickness. My question IS D.O.M.(drawn over mandrel) Is ths DOM tubing the standard for the cage material? Neither my SFI 25.5 specifications book or my old 2003 NHRA book mentions anything about the "DOM" 4130 .
Here is the quote from my SFI book. (25.5 spec)
All structural material for the roll cage, (tubing, flat bar, ect.), must be normalized 4130 chrome-molybdenum steel (4130N) purchased to the requirements of military specification MIL-T-6736B.
Is this MIL spec DOM?
I think by drawing the material over the forming mandrel it gives more consistant wall thickness. Is all 4130 DOM?
Thanks in advance.
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87 gn, Champion heads, 4 billet caps and a girdle. Turbonetics T66 4 bolt with custom 4" downpipe , FAST B/B W/WB02, PTE 210 roller cam, th400 w/trans brake. 525 RWHP @21 psi on a mustang dyno.
Current best et 1.465 60',4.176 @83.33 330', 6.455@105.81 1/8 mile.
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