Roll Cage design - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

240sxaddict · 06-22-2007, 11:33 PM

ok, time attack... you'd probably want to practice at some hpde level courses first right? yep...and have you ever looked up those sanctioning bodies rules(SCCA and NASA)? Let me see if I can find whats completely stupid/non-legal in your designs.

1) cages cannot travel through the firewall.
2) 6-8 points is max
3) overhead Xbrace is useless and definietly in the way
4) your main hoop must have on diagonal support bar and harness bar at the appropriate shoulder level. I only see this in one of your drawings.
5) the section rearward of the rear strut towers is useless. if the strut section doesnt flex if properly tied into the rollcage neither will the rear. plus the aforementioned extra points reason.

ok sure, you want to do time attack and they dont have specifics listed as to design of rollcage except it wont be accepted if it looks unsafe. your best bet is still to go along with scca/nasa specs because chances are the tech inspectors who are checking out the cages do it for multiple events/organizations and most likely know SCCA/NASA rules. and this is so you can still run your car legally at other events to keep your driving skills up and ready for the challenge. plus, a bare 6point cage costs an average of $1500 at a tuner shop... now add all those other braces... "poor with big plans" wont cut it there.

BTW... I design and build cages, not just talking out my ass here.

06-22-2007, 11:33 PM	#21
240sxaddict Leaky Injector Join Date: Jun 2007 Location: MD Age: 39 Posts: 89 Trader Rating: (0) Feedback Score: 0 reviews	ok, time attack... you'd probably want to practice at some hpde level courses first right? yep...and have you ever looked up those sanctioning bodies rules(SCCA and NASA)? Let me see if I can find whats completely stupid/non-legal in your designs. 1) cages cannot travel through the firewall. 2) 6-8 points is max 3) overhead Xbrace is useless and definietly in the way 4) your main hoop must have on diagonal support bar and harness bar at the appropriate shoulder level. I only see this in one of your drawings. 5) the section rearward of the rear strut towers is useless. if the strut section doesnt flex if properly tied into the rollcage neither will the rear. plus the aforementioned extra points reason. ok sure, you want to do time attack and they dont have specifics listed as to design of rollcage except it wont be accepted if it looks unsafe. your best bet is still to go along with scca/nasa specs because chances are the tech inspectors who are checking out the cages do it for multiple events/organizations and most likely know SCCA/NASA rules. and this is so you can still run your car legally at other events to keep your driving skills up and ready for the challenge. plus, a bare 6point cage costs an average of $1500 at a tuner shop... now add all those other braces... "poor with big plans" wont cut it there. BTW... I design and build cages, not just talking out my ass here.