Read the rule book. Look at lots of other cars. Use the right material. Make sure the joints fit very tight. Add extra bars , gussets. Tie the cage to the body at the A pillars, B pillars, cowl, any where you can. Tack everything before any final welding. If you have any question on welding, have someone that you have seen their work do the final welding. Designing to drop tha tacked cage thru the floor to gain access to all upper welds is a good idea. Take your time, no hurry. I built and designed my cage myself. It got good comments from the Division 3 tech director who certed it and a few well known chassis guys to boot. I am not a tig welder. I bent most of the tubes, fitted them all and tacked it. Had a professional weld it all up.
Doug
Perfect example there, cross bar has to be welded first, then the brace diagonal welded in next. It goes together in steps, something a person with experience will know. PPPPP, proper planning prevents poor performance.
if I understand you correctly, I thought a few years back, the above was changed, in that they now wanted the diagonal bar one piece, and the cross bar two pieces?
And the the reply earlier about needing two inches of clearance between any bar and the helmet, is that a written rule or common sense, although the 2" is somewhat arbitrary?
On the MS vs CM for Nascar, I thought there were three main reasons, cost, weight savings is not overly important, and the fact the stock cars get banged up over the course of a season and put back on the track, and MS can handle that, and welded CM, although a stronger material, doesn't like repeated abuse, and hard to tell when its near its useful end.
