Roll Cages And Cams Approved?

[gslrallysport]

The need for heat treatement of CM seems to have gone now that most people have the TIG requirements (temperatures) under control.

There are plenty of already engineered CM cages now, so the engineering costs are not as relevant any more. They simply sign off on a pre-existing design, no analysis required.

Chrome molly cages are a joke. Stupidly stiff brittle cages that don't give any flex whatsoever in the event of a crash, and due to the self-hardening properties of CM, will crack by themselves over time... CD Steel will stay joined together under a high load for a lot longer than CM. Drag cars aren't allowed to paint their tubes as the welds need to inspected every 5 mins of race time for cracks...

If you value your life, don't get a CM cage. After about 2 years they start to become weak, and very easily broken in the event of an accident. The death at Bathurst a year or two ago up the top, failed CM cage, the heart piercing bar that let go in the ex-rospen WRX at Jimna couple of years ago, failed CM cage... Chris Atkinson at Rally Japan last year where the cage just fell apart... FAILED CM CAGE!

There's a reason why the FIA has just banned Chrome Molly Cages in rally cars, its downright dangerous... To properly weld Chrome Molly is a very long and drawn out process, and very few can do it properly... and even when done properly it still only has a maximum useable life of 3-5 years maximum...

This isn't any help for you guys in Sydney but this company does a very cage and start with a 6 point CAMS approved for $1850 I think.

I'll get my car back with the cage fitted next week and will put some pictures up.

http://motorsportsolutionsaustralia.com/

Thanks for the plug! Appreciate it!

[Roy]

...To properly weld Chrome Molly is a very long and drawn out process, and very few can do it properly...

Agree, i cant speak for those that care currently manufacturing cages using CM, but the thought of ppl not utilising post weld heat treatment/stree relief is a concern. Sur eyou can control heat inptu pretty well with TIG, but doesnt change thge fact that you are changing the grain structure of the material (and surrounding) when welding it...