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Open Track Racing
Break my neck or Crush my skull?
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<blockquote data-quote="black-plasma" data-source="post: 7716392" data-attributes="member: 59879"><p>I just added a custom 4 pt. installed in my car and when I asked about 4130 he responded with the following;</p><p></p><p>> Yes, I can do 4130.. in fact I'm doing one right now BUT the problem is</p><p>> the two different rule sets (NHRA vs SCCA's). If I recall correctly-and</p><p>> I'll check to be sure- NHRA allows a thinner wall when using 4130 -thus</p><p>> the lighter weight- while the SCCA no longer allows the thinner walled</p><p>> tube. So, you end up with the same weight as a DOM Mild Steel cage. 4130</p><p>> has a higher tensile strength but typically doubles the cost (in</p><p>> materials and weld time).</p><p></p><p>4130 will give you a weight break if you only plan on drag racing, which is why it is popular with that crowd.</p></blockquote><p></p>
[QUOTE="black-plasma, post: 7716392, member: 59879"] I just added a custom 4 pt. installed in my car and when I asked about 4130 he responded with the following; > Yes, I can do 4130.. in fact I'm doing one right now BUT the problem is > the two different rule sets (NHRA vs SCCA's). If I recall correctly-and > I'll check to be sure- NHRA allows a thinner wall when using 4130 -thus > the lighter weight- while the SCCA no longer allows the thinner walled > tube. So, you end up with the same weight as a DOM Mild Steel cage. 4130 > has a higher tensile strength but typically doubles the cost (in > materials and weld time). 4130 will give you a weight break if you only plan on drag racing, which is why it is popular with that crowd. [/QUOTE]
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Break my neck or Crush my skull?
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