240hoke Posted July 3, 2008 Share Posted July 3, 2008 Your control arms look awesome! I want to build something very similar for my car.. also thanks for the coping link, looks handy and is now in my bookmarks! I have a few questions though on material use and construction. It may be a subject for a completely different thread in the fabrication section but thought i would mention it. Here is an quote from a fab book I just finished reading: "One final comment about using chrome moly - DON'T. There are few applications that warrant the use of chrome moly unless your building and airplane, a formula-1 car, or an indy car. Unfortunately, chrome-moly shteel has become trick. It literally falls into the category of "a little bit of knowledge can be dangerous" It goes on to mention that annealed chrome-moly should be used for suspension parts and it should be preheated to around 500 degrees before welding to prevent thermal shock and crack. After welding the metal becomes brittle and need to be stress relieved. It says the affected zones should be heated to a cherry red color (around 1250F) and then allowed to cool slowly to room temperature. I fall into the little bit of knowledge category but I thought I would just bring this up as its food for thought, and suspension failure wouldn't be a good thing. Quote Link to comment Share on other sites More sharing options...
EMWHYR0HEN Posted July 4, 2008 Author Share Posted July 4, 2008 Thanks Austin. From my research and recomendations, 4130 under wall thickness .120'' does not need to be pre heated if the surrounding temperature is somewhere above 70 degrees F. Also, one must make sure the welds cool slowly and no surrounding "breeze" of air contaminate the molten metal. I'm no expert but, I was guided all the way though my build by my welding and metalurgy professor who used to build drag race frames. Very knowledgeable guy. Quote Link to comment Share on other sites More sharing options...
MoNkEyT88 Posted October 28, 2008 Share Posted October 28, 2008 Did you notch your own tubing, or have someone do it? Quote Link to comment Share on other sites More sharing options...
Guest 280ZForce Posted October 28, 2008 Share Posted October 28, 2008 Did you notch your own tubing, or have someone do it? he notched it himself Quote Link to comment Share on other sites More sharing options...
EMWHYR0HEN Posted October 28, 2008 Author Share Posted October 28, 2008 Did you notch your own tubing, or have someone do it? Youd be surprized what you can do with a cutoff wheel and some good hand- eye coordination. Quote Link to comment Share on other sites More sharing options...
MoNkEyT88 Posted October 28, 2008 Share Posted October 28, 2008 Yes sir, Before we had all of this technology, somebody actually had to do the work manually. Quote Link to comment Share on other sites More sharing options...
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